Sr. No.
Questions
1
Stroke / Bore Ratio
2 3 4
Difference bw MECC & AECC Boiler Cold Starting Reasons for FW !accu" #ot co"ing u$
5
6
W% air co"$ressor cooler drain o$en w%en we sto$ t%e co"$ressor
Disc%age "et%od of EE cleaning water'
7
W% air co"$ressor crank case breat% $i$e $ro(ided and w% wit% fla$'
8
)ow to know cl oil feed is correct'
9
!*+ & su$et !*+ difference and %ow it works
1
Dead Man,s Alar"
Answers !n"ine #ower $eve%o#e$ &'()*)A)n)+, &'()*)A)n)+, o- one cy, no o- cy%in$ers. /u%ti#%y an$ $ivi$e by '20, were 0 is te ra$ius o- #iston & ()'*20,)A)n)+)20 & ()'Stro+eBore,)A)n) ()'Stro+eBore,)A)n)20 20 ence tota% #ower increases as stro+ebore ratio increases. An$ obvious%y #ower re$uces wen no o- cy%in$ers re$uces. A%so bearin" -riction re$uces as stro+ebore ratio increases. TBN
*t basicall ser(es t%e $ur$ose of An -nloader w%ile sto$$ing t%e co"$ressor to drain an tra$$ed air between t%e clinders.*t is done so t%at t%e tra$$ed co"$ressed air abo(e t%e $iston does not add u$ to t%e starting load t%e ne0t ti"e t%e co"$ressor cuts in. Mi0ture is collected in soot collecting tank. D tank %as %eating coils1stea"2. coils1stea"2. 3nce tank full $ut alkanit control c%e"ical n o$en stea". 3nce water e(a$orates collect d soot. A$art fro" dat during was%ing a 4ute bag is attac%ed to t%e $i$e o$ening of soot t%roug% w%ic% so"e a"ount of soot se$aration takes $lace. A$art fro" all dis ( %a(e a connection to bilge tank. But we seldo" use it as it creates trouble for ows. Also in case of tank ru$turing d content of tank could be transferred to bilge tank.
if ur $iston ring worn out or butt clearance is incresed so at t%t ti"e our crankcase is $ressurised so we want to a(oid t%t $ressure wit% t%e %el$ of breat%er $i$e.. fla$ is o$en onl w%en crancase $ressure is "ore t%n at"os$%eric $ressure
b calculating scoc and co"$aring it wit% s%o$ trial re$orts Before t%e Su$er !*+ was introduced (ariable in4ection ti"ing was obtained b "eans of a s$ecial $rofile on t%e fuel $u"$ $lunger. )ence t%ere was a fi0ed relations%i$ between t%e in4ection ti"ing and t%e fuel inde0. +%us it was not $ossible to ad4ust t%e fuel inde0 of t%e indi(idual $u"$s wit%out also altering t%e in4ection ti"ing. For t%is reason t%e Su$er !*+ was introduced5 w%ere it is $ossible to ad4ust t%e fuel inde0 and t%e in4ection ti"ing inde$endentl. Bot% do t%e sa"e function of "aintaining $"a0 after t%e break $oint. 3nl difference between t%e two is t%at !*+ %as a fi0ed break $oint w%ic% is usuall 678 load and su$er9!*+ %ad (ariable break $oint... Means break $oint can be c%anged fro" 678............ 678....................... ....................... .......................... .......................... .............. .. but w% t%e break $oint is to be ad4usted' Well before t%at let "e e0$lain break $oint5 it is t%e reduction of (it inde0 at a s$ecified load lets sa at 678"cr after t%at (it inde0 reduces. As is in fuel rack t%ere is an inde0 on %ow "uc% fuel is being $u"$ed 1ou can see t%at in fuel rack2 5 4ust like t%at (it inde0 is t%e ad4ust"ent in fuel ti"ing 1ad(ancing or retarding2. So in !*+ t%is break $oint is fi0ed "a be at 678 but in S!*+ it can be ad4usted t%ese are ad4usted electronicall t%e ad4ust"ent of break $oint de$ends on sca(enge air $ressure.#owadas all "an b&w %a(e s(it i guess
Surveyor
Function
Trassi Trassi Trassi Trassi Trassi Trassi Trassi Trassi
4b 4b 4b 4b
11
%ow to re"o(e and c%eck condition of butto" end bearing of A/E wit%out re"o(ing clinder %ead
Re"o(e fuel in4ecter >st . . And fr" t%at %old $ut ee bolt on $iston to$ and connect c%ain block . . . And nw o$en crankase door . . +urn t%e engine to suitable $osition so t%at u wil o$en connecting rod bolt and lower butto" %alf . . #w all wt .on c%ain block . . uide $iston rod and $iston and crancase w%ile turning engine so t%at its to$ $art doesnt da"age . . And wit% flas% lgt u can ins$ect to$ $art . . .
6 12
13
And(antages of se"i se"i balanced rudder ''
W% flw%eel $ro(ided in air co"$ressor
turning tor
*t works on $rinci$le of ca$acitance.... $robe interface is filled wit% dielectric. Dielectric constant of oil and water are different
14
o.w.s $robe working'
15
Diff btw unloader of "ac and reefer1draw reefers dia2
16 17 18
define sc( efficienc:. *f ; is de stroke wat s de for"ula foer sc( efficienc if ! is de total (olu"e ; is de stroke gi(e e
19
w% do u need a deaerator.. deaerator.. i said to a(oid air lock.. dont u t%ink e0$n tank can do it.. den wat s de significnce
2 21 22
rudder $ressure test Define critical r$". W %ic% all "ac%ines %a(e dat...does dat...does a centri $u"$ $osses criti r$" tra""el gauge %ow is it used:..W%r ll u find dat $unc% "ark.. e0act location
23
3ne gauge glass s%owing low le(el and in t%e ot%er t%e le(el is fluctuating.Action to be taken'
u %a(e to consider t%e reading w%ic% is lowest and sto$ t%e boiler if no correcti(e action take t%en lead to ru$ture of boiler tube
24
w%at is differential $ressure in ac co"$' W% no diff $res in "ac '
*n "ac air is sucked fr" outside nd in case of air refrigeration refrigerant refrigerant is sucked fr" closed line itself n refrigerant acts on d lubricant.....so lubricant.....so to get d e0act lube oil $ressure diffrential gauge is used
25
w% in4ection $ressure %ig% in diesel engines w%ereas boiler using sa"e fuel but less in4ection $ressure '
diesel engines are C* engines %ig% $ressure n te""$erature are re
26
reefer co"$ressor suction $ressure is constant and roo"s "aintained at different te"$erature %ow ''
27
W% refergeration co"$ressors are single stage co"$ressors'
in case of air co"$ressor Der is a solenoid o$eratd drain (l( wic% (l o$en d drain durng startng for ?9 Min der wud b no co"$ression in dat case n al d accu"ulated water "oisture wud b draind der b $re(entng d co"$ressor fr" %ea( startng tor
es#an$e
es#an$e
es#an$e es#an$e Bec= critical $ressure is low fr refrigerant
F3 (/( leaking leads to after burning resulting in reduction of @"a0 n increase in %ig% te"$erature.... Also black s"oke fro" funnel
28
fuel (al(e leaking 5 $a0 will increase or decrease '
29
Significance of %a(ing t%rust block inside t%e engine & as well as re"aining outside'
3
)ow to ad4ust ta$$et clearance if no "arks on flw%eel or ca"s%aft and $us% rods are tig%t
3$en t%e crankcase door and c%eck for t%e fuel ca" to be on rise and t%e re"aining two ca"s of $us% rods on base circle
31
W% $% of feed water in %ot well less t%an in boiler
Boiler water is "ore alkaline t%an feed water because c%e"ical added is carried back b stea" in reduced concentration.
32
W%at t$e of "otor is t%ere in windlass or winc%es
*n electro %draulic sste" winc%/windlass "otor is %draulic and $ressure generation $u"$ %as induction "otor:.!ariable deli(er $u"$ .......Also e0ternal gear (ane a0ial $iston "otor is also used..
%ow wil u know "icro"eter is gi(ing e0act readings'
"icro"eter is $ro(ided wit% a reference $iece t%at is of standard di"ension..7"" i guess..calibrate t%e "icro"eter accordingl.
Crankcase relief door setting.
Crankcase Relief Door Setting enerall done b s%ore $art wit% S$ring Balance Met%od. @ G F/A. Force is found out b a sensiti(e s$ring balance and area of t%e relief door is gi(en in t%e "anual. )ence5 $ressure can be set.
35
Bu"$ing clearance5 %ow it inc or dec5 %ow to c%eck.
Air Co"$ressor Bu"$ing Clearance *ncreases if t%e crank$in bearings are worn out and decreases if clinder %ead is o(er tig%tened o(er t%e gasket. Clearance can be "easured wit% t%e %el$ of a lead wire ball.
36 37
A-+3MA+*C C3MB-S+*3# SS+EM *# B3*;ER D*A A#D W3R*# Can o(ernor be "anuall disengaged
38
w% sli$$ing clutc% is $ro(ided in windlass..'
39
)ow do ou start a co"$ressor "anuall'
4
W%at is $ri"ing in fuel $u"$s'
41
our sea water line flange l eking ur %ief engineer tols u to cut gasket for t%at %ow u will cut.
Trassi
Trassi 33
Sar/a 34
Trassi
Trassi
42
43
our %dro$%ouk $u"$ was licking because t%ere was no gland on $u"$ %ow will ou select gland for $un$.
-r aft bilge well not taking suction $ossible reasons
Windlass is su$$osed to sli$ incase of e0cessi(e force. 3t%erwise ro$e will break and can cause accidents Re"o(al of air after re$lacing a fuel $u"$ on t%e engine. We use t%e sa"e line t%at circulates low $ressure fuel t%ru t%e in4ector w%en engine is not running. - %a(e to "easure outer dia of flange $cd n bolt dia n outer dia of $i$e.
Siris - %a(e to "easure s%aft dia5 see t%e si=e of gland casing5 w%ile asse"bling gland s%ould $ut one b one n s%ouldn,t %a(e an twist5 cut of glands s%ouldn,t in sa"e line.
Siris
Filter "a be c%ocked5gasket licking5ot%er two (al(e no %olding5 le(el of bilge is low5 %ole in bilge line5suction "out% c%o(ked b clot%es.
isra *f deflections are out of range..take "ain bearing clearance of all units...if "b clearances are not as re
44
)ow will u rectif t%at crank s%aft deflection
45
W% diffuser if (olute casing is t%ere ''
Diffuser is "ore effecti(e t%an (olute casing ..it is used w%ere %ig% $ressure is re
46
W% does t%e %draulicall o$erated e0%aust (al(e of t%e "ain engine not fall in t%e clinder if air s$ring $ressure is re"o(ed '
!al(e will not fall into t%e co"bustion s$ace as t%e s$indle is located onto t%e air $iston wit% t%e aid of a s$lit cotter w%ic% $re(ents t%e s$indle fro" falling down e(en if t%e s$ring air is (ented co"$letel
47
W% ( r not blowing down boiler to bilge
water flas%es off to stea" e0cess $ossibilit of burns da"age to e
48
W% distribution %ole is not $ro(ided i n clarifier $lates'
- don,t re
49
5
51
Bnkr line $r testing'
%ow to cut off fuel fro" s$rcific unit ' in "anue(ring if needed %ow to do it '
relief (al(e n Safet (al(e differences atleast 7
@rocedure...c%oose an one sa"e bk tk for suction and filling..kee$ing t%e (al(e o$en w%ic% isolates all t%e bunker tanks fro" t%e bunker "anifold.."ake sure bunker "anifold (al(e is also closed.. start fuel oil transfer $u"$...now slowl slowl start closing t%e bunker tk filling (al(e..t%is will increase t%e $ressure in t%e bk line Bc= as u %a(e closed t%e (al(es for filling bk tk... one %as to sta near t%e $/$ breaker wit% a radio set..t%e $ressure is raised till about H bar. ..n re"aining .I bar 1H.I bar2 wit% a %draulic %and $u"$..ti"e li"it * don,t re"e"ber...* t%ink it was > "in
in Man B& W lift t%e roller u$ using c%ain in Sul=er R+A +urn t%e knob below fuel $u"$. it can be done w%ile engine is running Fuel cut off le(er...turned to >6 degree b %and..so roller lift u$ fr" t%e fuel ca".. .take air %ose..and connect it to $uncture (al(e..u can cutoff w%en running also..
>.S! Full o$ern at set $r. R!Start o$en at set $ressure.Full o$en at>79 ?8abo(e t%e set $ressure ?.S! Close at set $ressure. R! Set at $r. ;ower t%an t%e set $r. S! Relie(e e0cess "ass R! RElei(e e0cess $r. HS! Can o$en "anuall R! Can,t o$en "anuall 7Set to o$en 8 abo(e t%e working $r R! Set to o$en at >8 abo(e t%e working $r
52
%ow we can order a $i$e
@re$are t%e data for w%at u %a(e to order. ;ike for $i$e 9 its no"inal dia5 s%edule5 "aterial5 legnt%5 $ressure5 etc. w%ate(er is known. Send t%ese data to co"$an t%roug% t%e software ser(ice $ro(ided onboard for ordering5 wit% CE3 and ca$tain a$$ro(al. 3t%er "et%od is to find res$ecti(e code for w%at u %a(e to indent in *M@A or *SSA "anual5 and forward a s$are re
53
E0%aust gas boiler n Eg econo"iser ....Differences
e0%aust gas boiler is an integrated sste" %a(ing its own water and stea" dru". Econo"iser is a se$arate %eat e0c%anging sste" getting water fro" and $utting stea" into au0 boiler water and stea" dru"
54
Wt is t%e function of "i0ing collu" in f.o sste"...''
55
in cascade tank oil is found and was is ur i""ediate action '''1boiler is firing now2..
Mainl >2 radual c%ange o(er of fuel fro" )ea( oil to diesel oil and (ice (ersa5 As na"e said it allows "i0ing of two grades of fuels ?2 An (a$our or air lock in ss is (ented t%roug% to$ of colu"n c%a"ber 2 *t $re(ents return of fuel oil w%ic% is alread at in4ection te"$ to again "i0 wit% co"$ low te"$ fuel in se(ice tk...t%ereb sa(ing t%er"al efficienc of fuel ciculating ss. H2 An alread counted fuel t%roug% flow"eter is re
*f u see oil in cascade tank...sto$ "ain engine5 c%ange generator to diesel oil5 t%en sto$ boiler5 c%ange o(er all d %eaters to stb %eater. # t%en c%eck one b one w%ic% %eater is leaking n rectif.
Siris
56
wat r t%e safeties in steering gear and its location..'''
57
w% t%e %ig% $ressure line1eg.steering gear sste"2 %as s
58
fro" telesco$ic $i$e 5 %ow does lo goes to 0%ead bearing 5 an ot%r conection is t%r after telesco$ic $i$e''
59
during "anue(ring5 %ow to know if starting air (al(e is leaking '
6
fitted bolts'' can anbod e0$lain''
61
w%at u %a(e done onbrd to control no0''%ow u know t%at no0 are in li"i t''
62
)ow to order nut n bolt'
63
W% settling tank te"$ is not "aintain abo(e J degree celcius.
64
W% we blow t%roug% engine in a%ead direction nor"al'
65
)ow to c%eck t%e trueness of o"d alar"''
66
)ow ll u re"o(e broken tie rod'
le(el switc%es are $resent in sste"5 relief (al(e5 "anual b$ass (al(e5 low $ressure (al(e5 electrcial sto$$er5 "anual sto$$er5 "otor o(erload alar". le(el switc% > will gi(e an alar" in case of loss of oil due to bursting of $i$e5 le(el switc% ? will acti(ate in furt%er loss and resulting in acti(ation of solenoid (al(es w%ic% will o$erate bot% b$ass (al(e and isolating (al(e si"ultaneousl as a result s$litting of sste" suc% dat eac% $ower sste" will o$erate ? ra"s onl5 furt%er loss of oil will results in acti(ation of rd le(el switc% in suc% situation fault sste" willb isolated and one sste" will o$erate ? ra"s as e"ergenc steering gear...RE;*EF !A;(e *S @RESE#+ in sste" to release o(er $ressure in case of rudder s%ocks during roug% weat%er location unknown. MA#-A; b$ass (al(e is $ro(ided incase of isolating one ssete" and rudder to turn "ec%anicall. low $ressure (al(e is #R! w%ic% o$ens for oil filling fro" %eader tank bec= in %ig% $ressure lines ( cA#+ $ut gaskets so $ro$er sealings and o rings ( use s
telesco$ic $i$e is arrange"ent %as one inner $i$e one outer & stuffing bo0 at d lower end of fi0ed outer $i$e %a(ing floating bus%. outer $i$e is 4oined to t%e "ain oil su$$l & inner one to t%e guide s%oe for Mc c. floating bus% is not $acked at bot% surfaces. "an b&w cross%ead 4ournal %as a central a0ial bore w%ic% %as connecting bores to u$$er s%ell. lower bore %as a transe(erse slit at d surface w%ic% is aligned wit% t%e large bore of t%e s%ell. large bore is longitudinall connected wit% ot%er groo(es. design %as certain features suc% t%at bigger 4ournal dia 5"ini"u" $la bw d surfaces5 c%anneling t%roug% groo(es. so (er largeload bearing area and better distribution of oil t%erefore $ressure re
con(ectional currents sets in due to w%ic% its not settling an"ore
enerall ca"s at t%e ti"e of testing after t%e $re(ious finsi% wit% engine are in forward direction 5 so first its forward is tested to a(oid e0cess air use and t%en 5 astern aftr abt >7 "ins once air res( tanks are back ? ca$acit .. *f distributor ca"s are a%ead after FWE t%an blow t%roug% will be a%ead and (ice (ersa C%eck 3 settingG flus%ing o"d wit% 3? fr" 3? clinder in o"d itself......c%eck for S$an setting w%ic% sends gas....don,t re"br na"e....%a(ng %ig%est ;E;.....if alar" co"es o"d is $ro$erl working.....corrections r welcu"
>.$ass a braided wire down t%e botto" %alf and $ull it out ?. if t%e break s "idwa t%en go for t%is "et%od... $ull t%e to$ $art out using c%ain block... for t%e re"aining $iece.... cla"$ it at t%e botto" e0$osed side... use $ull blocks and %old t%e tie rod $ice wit% cla"$... now re"o(e t%e botto" nut....and use a %d 4ack below t%e tie rod $iece.. now use a s$acer to $us% t%e $iece u$... re$eat $rocedure and use "ore s$acers till broken $iece e"erges out fro" to$.. use e/r crane to lift it u$ b
s$eed droo$ settings need to be altered. as t%e load increases5 t%e r$" tends to decrease before stabili=ing itself again. t%at "eans our generator s$eed i s falling below a certain r$" w%en load is increased "ore t%an 7kW. So w%at s%ould be done is5 run t%e generator at no load and c%eck its R@M. "ake sure t%at it is wit%in t%e li"its $rescribed in t%e "anual. *f not5 ad4ust it accordingl. @roble" s%ould be sol(ed. Agar gen is not taking load5 c%eck t%e go(ernor setting5 $ossible it,s load setting %as been set at a lower le(el5 t%en c%eck droo$5 if t%ese are correct5 c%eck $ower "anage"ent sste".... Bco= if $roble" is wit% t/c dat can be seen b "an ot%er was5 t/c will start "aking abnor"al noice 5 also if aur fault gen will not co"e on load.... @aralleling wud fail.
67
3ne generatar not taking "ore t%an 7kw5 w%' an one
68
S+@ blower fails' W%at will do'
69
one of t%e $late %eat e0c%anger is ru$tured w%at will u do' none $lease
Re"o(e ? consecuti(e $lates if new $late are nt a(ailable. and tig%ten wt% t%e sa"e a"ount corrs$onding to t%e t%ickness of t%e ? $lates re"o(ed.
7
*.g o0gen %ig% le(el..Reasons
Cooling air gi(en to u$take (al(e leaking 5 blower seal leaking 5 air da"$er o$ened "ore
71
)ow to test t%e relief (al(e of air co"$ressor''''''''
Re"o(e relief (al(e fro" co"$ressor n fi0 it to %draulic $u"$ wit% a flange ..use water for testing ..now raise $ressure ..n kee$ c%ecking $ressure at w%ic% it lifts
72
*n fuel oil ser(ice sste" for "ain engine. ..w% t%e %eater is $laced after t%e circulating $u"$ w% not before t%e $u"$'
73
w% cant we turn generator in re(erse direction
74
sur(eor on board s%ow %i" )@ relief (al(e is working .
75
Sca(enge s$ace ins$ection:w%at ou will c%eck before cleaning and after cleaning and before enter w%at $recaution ou will take..
76 77
)ow u will calculate co"$ression ratio.. ou %a(e to "ake a $i$e..%ow ou will "ake..
78
ear $u"$5 %ow does it generate $ressure5 cr oss
ser(ice air connection $ro(ided wit% $ressure reducing (al(e...
fuel is a "i0ture of lot of $roducts wit% different boiling $oint %ence if %eater is $laced before circulating $u"$ t%en it can lead to gasification ...so if it is after circulating $u"$ t%en due to increase in $ressure boiling $oint of $roducts of fuel also c%anges %ence $re(ents gasification t%e lube oil $u"$ won,t run in t%e ot%er direction %ence t%e engine will sei=e Close t%e disc%arge... Run t%e co"$ressor in "anual... *f it lifts at correct $ressure it,s working fine if doesn,t lift sto$ t%e co"$ressor i""ediatel
Siris Siris
8
3n t%e fuel $u"$ side5 a $i$e co"ing out of t%e fuel $u"$ wit% s$ring5 * said S)3C ABS3RBER W%ic% is t%e $oint at w%ic% s%ock absor$tion is needed' Function and need of la"ellas' 1 cross
81
Fuel $u"$ o(er%aul of A/E' w%at is t%e "ost i"$ortant as$ect w%ile bo0ing back t%e fuel $u"$ w%ic% can go wrong
82 83
Diff. B/w ref. Co"$. Mec% seal and $u"$ "ec%anical seal' if water is "i0ed wit% lb oil (iscosit will incr or decr.''
84
w%at action after an a/e is tri$$ed on low lub oil $r'
85
3"d alar" sounds -r action
86
W% $ressure test is carri ed b water not b air/gas'
*f t%e sste" bursts under t%e $ressure +est t%e air or gas will e0$and5 accelerating t%e broken $ieces of "etal outwards.So5 @ressure tests are alwas carried out )draulicall5 t%is usuall "eans water5 because t%at is c%ea$5 safe and readil a(ailable
87
w%at is t%e cause of e0t gases is co"ing out fro" all clinder %ead of au0 engine'
no==le ring of turboc%arger
88
w%at will %a$$en to t%e "ain bearing of au0 engine if lub oil $r is 4 ust near to t%e lub oil tri$ $r'
79
Trassi
s%i"s and "arking on t%e fuel rack and $lunger to be "atc%ed
ecrease ee$ t%e $re9lub $u"$ running ee$ turning t%e engine using turning bar...followed b Crankcase ins$ection after H7 "inutes Si"ultaneousl tr to find t%e reason for tri$. But $racticall we c%eck t%e ;3 filter first run fro" engine roo" as $er "an b&w
E0actl....t%ere will not be a "a4or $roble" as long as t%e engine is o$erating at low
Trassi
Trassi
89
Crankcase relief (/( lifting $resure
9
w%at r t%e ad(antaged of long stroke engine'
91 92 93 94
during lub oil water testing if i add reagent
95
if distance 1clearance2 between wear ring and casing ri ng is increased5 "otor a"$ere increased or decreased.
96
Boiler water test5 full'
97
Difference betn boiler water and 4acket water'
98
W%at is diff betn cetan and octane nu"ber'
99
+9Alkalinit test'
1
W%at is $erfor"ance cur(e'
11
)ow will - calculate $ower of "ain engine e0ce$t $ower card "et%od'
12
%w fuel $u"$ is connected wit% go(erner
13
air co"$ressor (al(es and %ow u will find out w%ic% side will be facing t%e $iston ' draw t%e diagra"
14
w% t%ere is negati(e ca" for air distributor & $ositi(e ca" for fuel ca"'
15
wat is "eant b Boiler safet (al(e floating'
16 17 18 19
Fuel $u"$ and e0%aust (al(e actuating ss in ca"less engine Was ur boiler "ediu" or low $ress boiler Ca$acit control in ac::.Diagra" of unloader in ca$acit control Air co"$ not starting on Auto & Manual
11
@ur$ose of turning gear
111 112 113 114 115 116 117
Met%od of cutting fuel $$ of a unit in "ain engine )ow ou will kee$ cross%ead bearing read for sur(e including "et%od of bearing re"o(al' Met%od of re"o(ing "ain bearing of "ain engine. W%t all c%ecks ou will do in gearcase of fuel oil se$arator' )ow ou will co"e to knw $urifier bowl %as attained re
118
W%at all $ossible reasons H incresed lub oil consu"$tion after > %rs of decarb of generator
119 12 121
%ot & cold corrosion draw stuffing bo0 and 0$lain Air co"$ress ).@ side ka $ressure ?7bar %ai to suction side $ressure kitna %o ga e0actl'
1.5 abso%ute >. Slow s$eed ?. ;ow grade fuel can burn co"$letel . Mo"ent of inertia is less and %ence flw%eel of less weig%t can be used
Trassi +a/at
For 4cw i said we usuall dose #itrate to sto$ corrsion5 n in boiler water we do $%os$%ate test 5 $) for $rotecting t%e boiler tube for scale for"ation.
+ake sa"$le fro" @9alkalinit test5 titrate it wit% #/7 sul$%uric acid n add "et%ale orange1 M9 alkalinit25 t%e colour of solution s%ould beco"e colourless fro" $ink. *t "easures t%e w%ole carbonate concentration and %dro0ile ion...
rion for calculation of $ower ot%er t%an @;A# for"ula is5 calculate t%e tor
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#egati(e ca" ensures $ositi(e closing of starting air (l( t%roug% air distributor...in negati(e ca" t%e ca" re"ains "ostl on base circle and onl $ortion of ca" at rise w%ic% $re(ents ca" fro" wear down...fuel ca" is alwas in o$eration w%en engine is running. Floating of a safet (al(e "eans setting t%e safet (al(e $ressure.
* (ressure tri# over%oa$ re%ay active
>. +urning gear is a starting interlock in an engine. Connecting t%e turning gear to t%e flw%eel5 o$erates a switc%5 t%ereb starting beco"es i"$ossible. ?. +o c%eck t%e free rotation of t%e engine,s $arts5 running gear5 c%ain dri(es5 s%aft5 $ro$eller.
*f our $iston ring da"aged t%en t%e can cause large consu"$tion of oil. *f o ring in our lo $i$e line of turboc%ager t%en oil will esca$e t%roug% t%at but no e0 %ig% te"$ will be noted
5 bar
Trassi
$( breaker is located in t%e line and $( (/( is on t%e tank ... $ur$ose is to $re(ent fro" o(er$ressure or (accu" @( breaker is located in a line its work for a line safet at a ti"e of $utting of ig for tank colla$sing its ? "" of wter gauge and for (accu" its 9I "" ag of (accu" and $( (al(e its indi(isual tank safet .. @( (( setting is >H & 97 ""wg for indi(idual tk5 to co"$ensate e0$n n contraction of cargo during sailing. @( breaker >6 & 9I ""wg is a co""on sec safet fr full ig line/ cargo tanks in case an $(( doesn,t o$erate Mast riser 1"anual o$eration2 to allow gases to esca$e n t%us $re(ent o(er$ressurisation of tanks w%ile loading...w%en $(( cant co$e u$
122
w%at is t%e $ur$ose of Mast riser5 @! breaker and indi(idual @! (al(es w%ic% are located on eac% cargo tank'''
123
%ow to know in4etion $oint of fuel $u"$
124
)ow to take butt clearance of $iston ring'' ...$rocedure and instru"ent used''
125
w% $ulse t$e turbo c%arging sste" is used in au0 engine
126
w% centrifugal $u"$ not used for %fo ...w%ile it is used for lo
127
all t%ings do ou c%eck during a0%aust (al(e o(er%aul ''
128
w%at all c%ecks ou do 4ust before "ounting e0%aust (al(e back '''
129
w%ic% > is better "ec%anical seal or gland $acking '' ''
13
%ow can ( control ca(itation ''
( can control ca(itation b controling t%e te"$ of t%e fluid and also controling t%e suctn $ressure.. suctn $ressure s%ould not reac% %ig% (acuu".. t%is can b controled b $ro$er "aintenance of sutn filter
131
w% Hs stroke go(ernor faster t%an ?s
As d s$eed of go(ernor increases its sensiti(it increase...it can detect s"all s$eed (ariations due to c%ange in load:.As we know dat HLt au0iliar engines r used as $ri"e "o(er for dri(ing alternators...& load c%anges r fre
132
Kacket water line of gen
133
)ow to s%ow sur(eor testing of bilge i n4ection (al(e'
134
Fwg if >8 (accu"'
135
aft bilge well not taking sucn
136
137
For new ring it is taken b $lacing it on t%e least weared area of liner and for old ring it is taken on t%e "ost weared area of t%e liner.. At t%at area for used rings t%ere is "ore c%ance of blow$ast because of lack of sealing: Because of load (ariation +%e $r re
c%ecks ( r doing after o(er%auling are leak test for air and dro$ down test of t%e s$indle:.. in dro$ down test test ( ll su$$l air to t%e non return (al(e in e0%aust (al(e asse"bl t%en ( ll re"o(e t%e air connectn.. if (al(e fall down wit% in > %r t%en it indicate leakages wit% in t%e ste".....for leakge test ( ll su$$l air to t%e non return (al(e.. if air co"es t%roug% a bore below t%e oil drain $i$e t%en it "eans ur ste" seal is leaking..t%en re"o(e t%e oil drain $i$e and c%eck.. if air co"es t%roug% oil drain %ole t%en it "eans eit%er ur air $iston is leaking or ur relief (al(e is leaking..
Trassi take a gunn bag ...Fill wit% water...And $ut it near d suction (ala(e of t%e $u"$...And start t%e $u"$
Trassi
*f (acuu" is >8 boiling rate of water (l increase n salinit increases.. scalling in e(a$orater increases:::::::::...Ra$id boiling5carro(er of salt5ad4ust (acuu"e ad4usting (al(e.. S%ell te"$ low leak in t%e line
Trassi Trassi
c%eck $eak and co"$ression $ressure5 e0%aust te"$5 4cw in and out te"$5 l.o ou are about to do decab of one unit in "ain engine 55 so w%at $ara"eters ou gonna record before doing t%at ''' and t%e $recautions'' $ressure "ain engine5 $iston cooling oil $ressure and te"$5 sca(enge air $ressure and te"$erature5 c%eck t%e stuffing bo0 l.o tank le(el5 "ake sure u %a(e a safet "eeting5 i""obili=ation certificate5 $ro$eller clearance and work $er"it before %and "/e 5 a/e eng lubrication
rion
flw%eel "arking5fuel $u"$ "arking...... b c%ecking t%e freeness of $us% rod and rocker ar".... b c%ecking t%e $osition of ca" s%aft... e0tre"e case b $utting %ead inside crankcase and looking inside liner ....re"o(e fuel in4ecrtor and fi0 a gauge t%ere ...w%en $iston is co"ing to tdc it will rotate in one direction at one $oint it will sto$ and rotating in o$$osite co= it started "o(ing to bdc..b t%is wa also u can find
138
%ow ou know AE $iston is in tdc '
139
Deco"$ression le(er of a diesel generator o$erates1o$ens2 w%ic% (al(e. e0%aust or suction''
14
W% do we use stor" (al(e in sewage sste" instead of non return (al(e'w%at is t%e ad(antage of using stor" (al(e'*f we use non return (al(e w%at will %a$$en'
And also for t%e fact t%at nor"all t%ese (al(es re"ain in close condition onl o$en due to t%e weig%t of disc%arge so unlike a regular sa globe #R! need not be alwas ke$t in an o$en $osition
141
if u see t%e sewage sste" t%ere is on u bend in t%e disc%arge line...can u tel "e w% it,s is t%ere' Wat is t%e reason
Si$%oning effect b bend:.a if der s no %eig%t of li
142
co"$ressor liner lubrication
143 144 145 146
stuffing bo0 n clearances w% we caliberate cl liner %e wanted to listen (er s$ecific answer lantern ring $osition and function in cen $/$5 re(ersing of staring air ca"
147
swelling 5 $anting in boiler
148
boliers9"ountings5 working of d$ trans"itter5 %ow feed water is controlled to boiler5 working of dia$%rag" control (al(e5 draw t%e control diagra" of boiler feed water controller
149
generator9 now u r gng to la u$ generator for ? "ont%s5 w%at all $recautions ou will do before la u$'5 w%at all c%ecks ou will do after ? "ont%s for restartig t%e generator
15
w%at is t%e ca$acit of ur air bottle' Regulations and %e asked safet too
151
w%at is u"s c%ecklist5 %e told "e dat5 now u r Ht% engr co"ing to engine roo" for u"s round5 tell "e $rocedure one b one.
152
w%at is t%e $ur$ose of $uncture (al(e5 %ow it will acti(ates5:..+%en %e asked55 e(en in running ti"e of "ain engine at sea5 air is $resent on to$ of t%e $uncture (al(e but w% it is not acti(ating'''
153
w%at is "ean b stea" %a""er'.....w%at is "ean b water %a""er'
154
w% gudgeon $in floating t$e in engine but not in co"$ressor''
155 156
W%at is #D+W%ic% all #D+ can be done onboard W%at is initial setting of dial guage w%at,s it,s least count w%at,s it,s range
157
W% would t%ere be r$" fluctuations in case of sca(enge fires'
eaust
Co"$ressor liner lubrication is done b in4ecting dro$s of oil t%roug% t%e inlet (al(e along wit% t%e air
Swe%%in" : su$$en %oa$ increase stea/ #ressure "oes $own water %eve% sows tan nor/a%
la u$ "eans we %a(e to kee$ generator for > or ? "ont%s in idle5555 first and i"$ortant t%ing is condition of s$ace %eater555 it will take care of t%e insulation of windings555 %e is %a$$ wit% t%is answer555 t%en we %a(e to tell abt t%e $ri"e "o(er side like condition of lube oil5 $re%eater5 fuel line c%ecks5 an rust or corrosion to t%e $ri"e "o(er after la off etc.
in stea" %a""ering..t%e stea" goes to t%e cold $i$e w%ic% is %a(ing condensate inside and not been drained..so w%en it goes in it cools down and for" water ra$idl w%ic% lowers t%e $ressure in at t%at s$ot and t%e condensate w%ic% was not drained full get sucked on to t%at $lace and bang t%e walls of t%e $i$e..t%ats stea" %a""ering but water %a""ering is w%en a (al(e1ot%er t%en stea"2is o$ened and $ressure is %ig% like water fro" a $u"$ and t%at water %its t%e bends of t%e $i$e creating noise and da"age to t%e $i$e..
*n air co"$ t%e c,s%aft is dri(ing t%e $iston in all strokes5but in case of AE c,s%aft is dri(ing t%e $iston in all strokes e0ce$t $ower stroke5w%ere t%e $iston now dri(es t%e cranks%aft.So t%e sudden c%ange in direction of force can cause an *M@AC+ ;3AD*# on t%e $in if it is floating due to clearance in AE $iston
non $estructive tests
*n sca(enge fire5 t%ere will b less air a(ailable for sca(enging5 n t%us t%e @"a0 will b less5 in s%ort5 $ower will b less so t%e firing will affect n t%e cranks%aft "o(e"ent will Fluctuate.. t%us r$" will fluctuate in accordance.
+a/at +a/at
16 161 162
- %a(e to weld crack in a $late..w%at is t%e surface $re$aration u will do.. Safet in gas cutting So"e Bearing no JJJRS w%at does it all re$resent
163
W%at is batc% $urification'
164
A sea water $i$eline on our (essel is corroded and leaking5 %ow will ou $re$are new $i$eline on9board
165
*"$eller of a centrifugal $/$ is stuck in t%e $u"$. )ow will ou re"o(e it wit%out an da"age.
166
can anone %el$ "e wit% t%e back $ressure relations%i$ in a $urifier...i "ean if i increase t%e back $ressure 1b closing t%e (al(e2 or reduce t%e back $ressure 1b o$ening t%e (al(e2 w%at will be t%e effect on t%e $urit of oil'...a$art fro" t%e E9;*#E "o(ing outward and inward res$ecti(el.%ow will back $ressure affect t%e o$ening and closing of bowl'
167
%ow to select gland $acking
168
if no (iscot%r" onboard 5 %ow u "aintain fo (iscosit'
169
boiler not firing w%at would be our actions'
17
W% back $ressure (al(e in refri (eg roo" e(en t%oug% a t%er"ostat is t%ere'''
171
w%n o"d will gi(e alar"' at w%at $ercent ;E;
172
Engine roo" crane "aintenance'
173
)ow to tig%ten boiler gauge glass''
174
)ow to carr out leak test in s%ell and tube t$e ).E
175
)ow do ou weld ? Al $lates''
176
Centrifugal $u"$ air e0traction "et%od'
!#%ain $ye #enetrant test
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#or"all done if so"e conta"ination is found in oil..."ostl water..+ake entire oil fro" su"$...transfer it to lube oil settling tank...let it settle for at least ?H %ours...drain little water fro" it...start $urifier doing suction and filling to l ube oil settling tank..do water test in oil...and kee$ c%ecking water content.. )e wanted to know about %ow 4ig is $re$ared and flanges are "ade...For flange ou "easeure t%e dia"eter of t%e flange5bolts5@CD and t%e inner dia"eter of t%e $i$e
rion
tr to %eat t%e i"$eller and t%en use bearing $uller to re"o(e it
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See if no back $ressure oil (l co"e n go like a $u"$ ..if back $ressure is t%ere oil (l sta for a w%ile to o(erco"e t%at $ressure ..so "ore t" oil stas in $urifier so "ore $urification Based on fluid5 te"$ "ainl5 3D5*D We "aintain t%e te"$ re
ta+e to /anua% o#eration. ;%ose -ue% an$ ato/ia/e -ai%ure 'ta+e out #i%ot burner n$ a$?ust te e%ectro$es n$ c%ean te =%ter insi$e te burner n$ b%ow wit air, 3.>a/e -ai%ure' o#en /ain burner $oor c%ean te air no<<%e torou"%y n$ swir% #%ate, @- ave >a/e -ai%ure ?ust reset te a%ar/ n$ cec+ te #ressure o- te #i%ot $.o #u/#. @- no #ressure =%% u# #i%ot $.o tan+ n$ $o #i%ot $.o #u/# #ur"in".
>.%old back a %ig% e(a$orator $ressure w%en an e(a$orator feeds into a co""on co"$ressor suction line fed b e(a$orator working at lower $ressures. ?. controlling e(a$orating $resssure and %ence te"$erature to a(oid low te"$erature w%ic% could cause $roble"s 1 free=ing in water cooler 2 ?.78 for ? stroke ..>.?78 for H stroke "ediu" s$eed engine bea" defection w%en %ook is at "ini"u" distance :. Running test for "ins to c%eck te"$erature ;i"it switc% Break testing and lubrication... 3(erload testing...........Wire renewal 7 ears
first o$en t%e bot% end co(er of t%e cooler s%ell and t%en fill t%e s%ell wit% water 5 and finall $ressurise s%ell using co"$ressed air t%roug% (ent connection & c%eck t%e bot% end of s%ell . if an tube is leaking t%en water "ust co"ing t%roug% t%e tube w%ic% is leak.. +ig welding is used ...tungsten inert gas ...argon is $ro(ided wit% torc% w%ic% s%ield t%e "etal fro" o0idation and arc is struck between tungsten electrode and $arent "etal Air e4ector "et%od li
177
Sweating of refer cc 'causes and action'
178
Bearings used in $urifier'
179
$ositi(e ca" and negati(e ca" differences..'
18
w% a negati(e ca" is used instead of $ositi(e ca"
181
*n w%at case ;ocal e"ergenc "anoeu(ring to be carried out..' ;ist all t%e ste$s in(ol(ed in e"ergenc "anoeu(ring..'
182
*s t%ere an tel tale %ole $ro(ided in $late t$e %eat e0c%anger
183
And w%ile o$ening we tig%ten t%e 4ack full first and t%en loosen it a bit ... b %ow "ucc% angle do we loosen it
184
W%at %a$$ens to efficienc if u go fro" cold sea water to %ot'
Means li< ref is returning... Slig%t sweating is ok...e0cess sweating s%ows fault t0( b%ai %" sure n%i %ai....agar wet saturated low te"$ ref gas c/c "e aega to outside c/c "oisture will condense....i.e sweating.....causes fault te( setting 5 frosting of e(a$orator coil & e0cessi(e fall in s.w te"$ w%ere condensor is s.w cooled t%at will lead to e0cess subcooling dan e0$ected.....actions t%rottle d cooling water outlet....so dat ref gas te"$ increases....defrosting b $assing %ot ref gas or b e0ternal %eaters if $resent Reasn is li< ref cu"in bak to cc.."eans al d ref is nt used in d e(a$orator.dt "a be due to e(a$oratr fan nt running5incorrect setting of t0(5t0( "alfunction5solenoid (l( "alfunction5e(a$oratr tubes frosted or fouled5crankcase %eater nt wrking
in "itsubis%i self4ector $urifier....u$$er bearing is su$$orted b s$ring.....lower $art %as ? bearing....+%e %ig%er one is roller t$e....and below t%at a t%rust bearing.....+%e lower two are i""ersed in oil in t%e gear case....+%e direction of t%e t%rust bearing is i"$ortant. ....*f $laced u$ side down t%en it will go off in > "in. t%us in t%e (ertical s%aft total bearings. )ori=ontal s%aft is su$$orted b two ball bearing or roller bearing at t%e two ends. !ertical s%aft contains t%ree bearings.+wo bearings at t%e e0tre"e ends are roller or ball bearings.+%e u$$er bearing containing t%e s%aft is "ade radiall stable b t%e s$ring loaded asse"bl5w%ic% is res$onsible for t%e (ertical inclination of (ertical s%aft.+%e ne0t lower bearing is an angular bearing to su$$ort t%e s%aft a0iall and counteract t%e t%rust force. w%en t%e "o(e"ent of roller is u$wards for actuation5 t%en its $ositi(e ca". and w%en roller "o(es downwards t%en its a negati(e ca". for e0a"$le fuel ca" is $ositi(e ca" and start air distributor is negati(e ca".
+o $ositi(el s%ut ofc $ilot air to starting ((...& also a negati(e ca" wont be in contact of rollers t%e t" of w%ole engine o$eration 1w%en start air is cut off2...t%us reducing its wear *n negati(e ca" at t%e working face of ca" t%e follower or (al(e will act in downward direction as in case of starting air distributer w%rere $ilot (al(e actuate in downward direction and it s%uts because of s$ring $ressure in case s$ring fails negati(e ca" will $ositi(el s%ut it. snd in nor"al o$eration its no "ore in contact wit% (al(e rod so reduces ca",s wear and tear
Failure of re"ote ctrl ss5 Fail of go(r55 @rocedure9 take control fr" bridge to engine roo" ...$ut blowers on auto ..turn go(ernor knob to local "anu(ering ..go to local $latfor" and c%ange selector switc% to engine side ..c%eck starting air $ressure ..contact bridge wit% walkie talkie ..acce$t telegra" ... i(e air kick after reac%ing a certain r$" ..increase fuel le(er fro" =ero ..n gi(e fuel according to r$" re
185
)ow to detect leaks in $late t$e %eat e0c%anger'
186
*f w%ile o$ening a nut wit% %d 4ack it is not o$ening at s$ecified $ressure t%en wat to do
187
W%at is fuel $u"$ lead in 4erk t$e fuel $u"$
188
)ow "an wear ring and casing ring are $resent in a centrifugal $u"$.
189
e0$ansion tank o(er flowing and bubbles co"ing out reasons and actions '
19
aft bilge well not taking suction w%ere as forward bilge well is alrig%t are t%e reasons'
191 192
Ste$s for $re$aring M/E for de$arture. %ow ball Bearing is fitted on s%aft'
193
t$es of filler gauges
194
w%at are t%e edd losses in centrifugal $u"$'
195 196 197 198 199 2
)ow air "otor lubrication is done' W%at is "o"ent co"$ensator' w%at is Mark no. *n Js7ME c6.? w%at does C in Js7ME C6.? stand for )w to c%eck garter s$ring $ro$erl wrking Autoback flus% filter working
21
#a"e t%e deck crane "o(e"ents n safet of deck crane
+ell tale %ole is $ro(ided in gasket:::::..*ndi(iduall ins$ect $lates one b one in a darkened s$ace wit% a la"$ against t%e $late and ou can s$ot if an "inute %oles in t%e $late. +%ese %oles cause internal leakage between t%e two "ediu"s. if an $late $erforation found5 $lates to be discarded in $airs.............................................................. (isual ins$ection or fluorescent de $enetrate is used to find an defeats. 1De $enetrate is used on one side5 followed b ultra(iolet ras on t%e ot%er side2 * don,t t%ink t%is "a occur..*f so increase little b little "ore $r but not "ore t%an 7 to > bar
+%e distance t%e to$ of $lunger is abo(e t%e cut off %oles w%en t%at unit,s $iston is at tdc::. B c%ecking t%e fuel $u"$ lead "arkings and t%e $lungers $osition wit% res$ect to t%e "arkings5 we can deter"ine w%et%er $iston is at +DC. +%is is in addition to to its "a4or reason5 w%ic% is to c%eck fuel ti"ings wit% res$ect to $lunger wear. . +ill now w%ic%e(er centrifugal $u"$ i %( o(er%auled i %( found one wear ring at suction t%roat to $re(ent s%ort ckt of suction & disc%arge side5 n two casing rings to $re(ent erosion of t%e casing
1..Dac+ey water suction #u/# "%an$ %ea+in" so #u/# t+in" suction -r/ tt #%ace so tese air ir co/in" out -r/ e#ansiin t+ in bubb%es -or/ 2..;rac+ in %iner can"e te %iner 3.inter coo%er in ac %ea+ i- bubb%es reason is %iner crac+?cw eater %ea+in"air co/#ressor ?ac+et %ea+in" .......i- e t+ over>ow1. ?cw eater %ea+in" an$ stea/ #assin" truo ?ac+et water si$e2.%uboi% coo%er %ea+in" an$ oi% "oin" to e t+3. e.t+ =%%e$ wen te en"ine is sto##e$ r co%$wen en"ine starte$ t water #re eate$ an$ wi%% e#an$ 4.=%%in" va%ve %e-t o#en
strainer of aft bilge well c%oked....or gasket of strainer broken so sucking air....%ole on $i$eline...
Trassi trassi
Tere are 6 ty#es o- -ee%er "au"e avai%ab%e: 1. Eo NoEo -ee%er "au"e 2. Strai"t %ea- -ee%er "au"e 3. Ta#ere$ -ee%er "au"e 4. oub%e en$e$ "au"e 5. set "au"e 6. Fee%er stri#.
$u"$ start wit% outlet (al(e close....nw as we knw $ower is rate of doin wrk...in $u"$ work is to transfer t%e water..as t%e outlet (al(e is close n no water transfer take $lace5 den t%eoreticall no $ower consu"e..bt $racticall as ( start t%e $u"$ (id outlet (al(e close t%ere is still so"e $ower consu"$tion take $lace5 w%ic% can b seen as a"$erage,s of "otor....dis $ower consu"$tion is due to circulation of water wit%in casing...due to centrifugal force generated b $u"$....t%is is called edd losses in centrifugal $u"$... b FR; unit1filter regulator lubricator2 on t%e air line
0ea$ $ierence bw ; ;C; es#an$e es#an$e 1. oistin": ?ib /ovin" u# wit car"o %oa$. 2. S%ewin": crane rotatin". 3. *un": "rab /ovin" $own to re%ease car"o %oa$. +a/at
22
+/C surging in A/E....w%at will be ur action''
23
W% do we need to $u"$ down all t%e refrigerant before refilling''
24
@ur$ose of da"$er $lates in co"$ressor (al(es
25
)ow to re$air da"ged t%read of stud'
26
@erfor"ance of Hs engine and w%at all $ara"eters taken.Co"$ression $r taken or not5 %ow taken
27
W%at is written on ta$s and des5 w%ic% t$e of t%read'
28
Difference in gauges of refer gauge and ot%er gauges
29
*s t%ere an bellow before stea" sto$ (al(e in boiler 5..'''
21 211
$ressure relief (al(e on disc%arge side of air co"$r o$ens w%at will be t%e reason %ow to do inter$olation of sounding w%ile taking bunker ( alues gi(en
212
in bdn ul get densit of oil at >7 but ur taking oil at H97 a$$ro0 so wit% w%ic% for"ula will u calculate t%e densit at t%e gi(en te"$
213
%ow will u c%eck trueness of s%aft of centrifugal $$
214
Alar"s5tri$s interlocks in incinerator
215
+$e of burner in ur *' Draw it.
1. ;ec+ te %oa$. 2. ;ec+ te con$ition o- turbocar"er =%ter i- $irty ten renew. 3. !nsure no en"ine roo/ $oor is %e-t o#en'to /aintain #ositive #ressure., 4. !nsure te b%ower is #rovi$in" enou" air an$ is $irecte$ towar$s te turbocar"er. n /y si# te air $uctin" was $ivi$e$ an$ one o- te branc %e$ to te wor+so# store te -avourite s#ot -or Eaa%a /a+ers. -ten te oi%ers use to sut te venti%ation at oter #%aces to "et /ore awa in te store. %o%..
if we c%arge t%e refrigerant b weig%ing bottle5 we know t%at certain a"ount %as left t%e bottle. But we are not sure w%eat%er t%e sa"e a"ount %as reac%ed t%e sste".1"abe leaks in c%arging connection2 Secondl5 if we c%arge t%e refrigerant b onl seeing le(el in recie(er5 t%en we know certain a"ount %as entered t%e recie(er5 but we dont know if t%e sa"e or "ore a"ount %as left fro" t%e bottle1due to leaks in t%e ref sste"2. )ence we $u"$ down all t%e refrigerent and note down t%e initial and final bottle weig%t. #ow5 b talling t%e rise of le(el in recie(er and ensuring t%at bottle weig%t difference is also t%e sa"e5 we know for sure t%at t%e rig%t a"ount %as been c%arged
+%e $$ur$ose of da"$er $late is to $rotect t%e (al(e $late fro" une(en co"$ressi(e force and %ence to $re(ent undue weardown against (al(e $late and seat w%en co"$ressor %a(ing (ariable s$eed dri(e55555t%is $late "a not be fitted in case of induction "otor dri(e as a dri(er of co"$ressor wit% a needle file or a die nut:...Mainl done using t%e die w%ic% "atc%es t%e t%reading alread $resent. -se a "etal $olis% solution along wit% lube oil on t%e area and t%en use t%e die slowl "aking sure u don,t da"age t%e ot%er t%reads. Ensure not to a$$l too "uc% $ressure..
Ta# an$ $ie ave written: A. Trea$ #er inc'#itc, B. Ta# /ateria% ;. Trea$ -or/ sy/bo%s . (itc $ia. *i/it
#o..but ek de"ister 4aisa %ota %e.. to sto$ water $articles getting carried out...
trassi
%old d s%aft in lat%e.. fi0 a dial gauge1one w%ic% %as "agnetic base25 so t%at its $lunger touc%es t%e s%aft. set it at =ero in t%is $osition. turn t%e s%aft > re(olution wit% %and slowl and c%eck for t%e deflection. re$eat t%e sa"e $rocedure at different $oints along t%e lengt% of s%aft..
fla"e failure 5sld te"$ %ig%5 sld te"$ low5co"bustion c%"br te"$ %ig%5 flue gas te"$ %ig%5draug%t failure5 low le(el sld tk for incinerator5 t%er"al failure "otor o(erload .. all t%ses alar"s followed b tri$ sto$ incinerator .interlock9 door will not o$en till t%e CC+ reac%es to >I,c & flue gas will will be running continouls till CC+ te"$ dro$ below >I,c5 $ressure 4et t$e
/isra
tt#:www./arine$iese%s.in-o2Gstro+eGen"ineG#artsterGin-oairGstart 216
Auto air start (al(e' W%t t$e it was' Difference between sa"e for B&W and sul=er'
217
All Alar"s in steering ear'
/isra /isra
218
Steering gear test before de$arture5 w%at all test and c%ecks u do'
219
sea water $i$e flanges leak5 %ow to "ake gasket and fit gasket
22
w%at is t%e difference between windlass and " ooring winc%
221
fro" wer to take botto" end bearing clearance. of. generator..'
222
$urifier fuel oil te"$ not co"ing u$.reason
223
.w%at is t%e ;ube oil $ressure in refrigeration sste". w%ats t$e of condenser on our s%i$ and %ow is cooling water in/out arrange"ent in condenser 5cooling water enters fro" down side or u$side.
224 225
Su$$ose we will $ut e(a$orator in roo" t%en roo" will cool down or not.
226
W% t%ere is lube oil differential $ressure in co"$ressor and w%ic% $ressure it is s%owing.
227
testing starting air ((
228
Function of c%lorinator c%a"ber in sewage treat"ent $lant. W% we are adding tablets in sewage treat"ent $lant
229
W% co"$ressor is used i n (a$our co"$. Ccle.w%at is lub oil $ressure in co"$ressor
23
Function of deaerator.
231
+$es of e0$ansion (al(es. +E!5 is t%ere an b9$ass line for it. )ow does electronic e0$ansion (al(e work.
232 233
W%at will %a$$en to interface if s"aller si=e gra(it disc is used +$es of Air Conditioning Sste"s and w%ic% t$e on our s%i$.
>? %r before de$arture fro" $ort >. co""unication between e/r5 s/g roo"5 bridge ?. "ain steering . au0iliar steering H. e"ergenc steering. 7.e"ergenc $ower J. !isual ins$ection I. Rudder "o(e"ent fro" one side 7 to ot%er side 7 wit%in ?6 sec. 6. $osition of rudder wit% res$ect to $osition indicator N. detail diagra" of steering gear to be $asted in steering gear co"$art"ent +ake inner dia5 outer dia5$cd of flange and cut t%e gasket
/isra
A winc% is a "ac%ine usuall $owered b a %draulic/electric $ower unit t%at is used to %andle "ooring ro$es w%ic% are used too "oor a s%i$ w%ile it is in $ort or to a buo as in SBM/S@M o$erations. A windlass is a "ac%ine %draulicall actuated1stea" $owered in t%e olden das2 used for letting go/%auling u$ of anc%or. +%e $ower rating of t%e $ri"e "o(er of t%e windlass is "uc% %ig%er w%en co"$ared to t%e $ri"e "o(er of t%e "ooring winc%es. A s%i$ will usuall %a(e ? windlasses1for starboard and $ort anc%or2 and 79I 1de$ending on t%e si=e of t%e (essel 2"ooring winc%es Botto" s%ell w%en $iston is at bdc Ma be >2 Settling tank te"$erature too low...?2 +ransfer of %fo is going on to settling tank & t%e res$ecti(e bunker tank stea" is closed/blank for an $ur$ose...2)eater is not working $ro$erl..H2 )eater stea" return line (al(e is s%ut. 72stea" tra$ s not working $ro$erl
Siris +a/at +a/at +a/at
Diff $ress is t%e $ress diff betwn suction and l.o $ress in co"$. su"$ bc= suction is connected to t%e co"$ressor t%ere is aiwas $ress inside t%e co"$ 5if l.o is finis%ed t%en co"$ will da"age bc= $ress is t%ere inside so to knw t%e lo is t%ere or not t%ere is alwa a diff. @ress gauge and it is nor"all ?.79H bar.
+a/at
if u want to test starting air (al(e wit% bar $r trassi nu ke% we will close t%e air to distrubutor and kee$ all t%e indicator cocks o$en o$en starting air auto"atic (al(e and c%eck fro" eac% unit indicator cock w%et%er air is co"ing or not or use soa$ solution is u want to c%eck "inor leakage of starting air (al(e also
Trassi
We want to killl aerobic bacteria before disc%arging in sea bcse if u are disc%rging aerobic bacteria so its consu"ed o0gen and its %ar"ful to our sea life t%ts w% we kill bacteria in c%lorination c%a"ber
according to ?nd law of t%er"odna"ics 5%eat can onl be transferred fro" a source at low te"$erature to a sink at %ig% te"$erature if work is done on t%e sste". .now co"$ressor is used for t%is as it sets t%e refrigerant abo(e critical $ressure so t%at t%e refrigerant is in li?9>7bar -ndissol(ed gases...including tra$$ed air can be released to e0$ansion tank t%roug% a $oint %ig%est in line for deaeration.....
0eeat syste/ oub%e $uct syste/ Hone contro% syste/
/isra /isra +a/at /isra
if t%e s$ecfic gra(it of t%e bunker to be treated is %ig% 5t%e oil co"$onent %ig%er s$ecific gra(it will tend to go far awa fro" t%e center of rotation 5so t%e interface will s%ift outwards and t%e oil will start o(erflowing fro" water outlet ..so we will use a s"aller dia gra(it disc to "aintain t%e interface inwards ...............co= in t%e $urifier in order to "aintain interface t%e $ressure on eit%er side of interface s%ould be sa"e if r%o increses t%at will be co"$ensated b decreasing si=e of disk
235
in reference to no"ogra" c%art w% do we $refer s"aller dia"eter of gra(it discs for %ig%er s$ecific gra(i t of li
236
W% li$ clearance is gi(en' W% cant we fit relief ( al(e on boiler'%ow to "easure li$ clearance
237
do we %a(e air distributors on H au0 engines.... arent de air "otor started'''.. and %ow to ad4ust co"$ression $ressure of a running engine...
238
e0$lain %ow air distibutor works
239
w%at is t%e difference between e0$ansion (al(e of a.c. and refer sste"'
in AC A! 1Auto"atic2 t$e e0$ansion (al(e used...t%ese are $ulse "odulated....electronicall @* controlled (al(e. in reefer we are using t%e nor"al Su$er%eat control t%er"ostatic e0$ansion (al(e.
24
W%at is t%e use of u"brella seal
241
w%at are t%e was%er s$rings5 w%ere used in au0 engine'
*t is a seal5 actuall like a lea$ seal leaded fro" inside b s$ring to $re(ent t%e "i0ing and t%ereafter conta"ination of ca" lub oil b fuel oil.*t was introduced due to failure of sealing ring at %ig% te"$erature and losing its elastic sealing $ro$ert..........%el$ t%e lube oil conta"ination fro" fuel in t%e MA# engines *n rotoca$:..+o rotate s$indle:
242
Function of %unting gear
243
W%at is t%e difference between fuel (al(e o$ening $ressure and fuel in4ection $ressure'
244
w%at is blow down ring in safet (al(e'
Wit% t%e %el$ if li$ clearance we are incresing t%e area of a seat so "ore force acting on a (al(e so we ac%ei(e d/ >? witg t%e %el$ of li$ seal and clearance we are "easure fr" feeler gauge::::::::::::::::.. We dont use relief (/( bco= we want to release t%e e0cess st" $ress. And to attain blowdown effect w%ic% is not $ossible in relief (/(........... ;i$ clearance is not "easured b filler gauge..it is "easured b lead ball at least H in no. And tig%ting t%e bolts at re
larger generators in an"ar are started b air start (al(es and air distributor ie. sa"e as %ow t%e "ain engine is started .. M $re(ious s%i$ %ad air distributor .. but "ost of t%e" are air "otor started:::::::::. co"$ression $ressure of a running generator can be increased b eit%er re"o(ing t%e turboc%arger felt filter 1 or c%anging if c%oked 2 to increase t%e air intake 3R b t%rottling t%e air cooler cooling water so t%at t%e te"$ of t%e turboc%arged air is decreased e(en furt%er to increase t%e densit and t%ereb increasing t%e air intake ...
t%ere are t$es of air distributors ... radial 5 in line and rotar :::. t%e generaotors and "ost of t%e newer "ain engines in MA# B&W %a(e rotar t$e5 w%ere two $lates 5 one rotating wit% t%e ca"s%aft and one stationar 5 %a(e %oles 5 and t%ese "atc% to send air to a $articular unit .. t%e diagra" of t%is t$e is (er co"$le0 and not eas to understand...... t%e older ones %a(e eit%er in line or radial 5 its e0$laination is
>. )unting gear floating le(er "ec%anis" is re
245
W%at is $ro$eller $us% u$''
246
if a $u"$ is used to $u"$ ? cargos wit% different S and $u"$ tri$s wen $u"$ing t%e %ig%er S one... wat ? do.. ot%er t%an %eating or cooling of cargo.
247
%ow will u asse"ble o(er%auled fuel $u"$' )ow t%e barrel is fitted' )ow it is ensures t%at rack is fitted $ro$erl' W%at is t%e s$ecialit of deli(er (al(e'
@ro$eller $us% u$ "eans $us% our boss fr" =ero $oint to gi(en distance b t%e "aker wit% t%e %el$ of dial gauge and $ilgri" nut or %draulic 4ack.... or b skf sste"::::: *nitiall w%ile fitting $ro$eller a "arking is "ade5t%en as said b (irendra wt% %el$ of %d $u"$ $ilgri" nut I bar $ressure is gi(en to $us% t%e $ro$eller..and t%e distance to be obser(d..t%is difernce in initial "rking and new distance is $us% u$............. before $utting %ub we do reference "arking and t%en we $ut I bar $ressure on %ub and tr to $us% t%e %ub till t%t $oint after reac%ing t%t $oint again "ark H "" fr" %ub to s%aft after "aking calculate t%e distance btween two $oints so u got ur =ero $oints t%en we use "akers reco""endation (alues for accoto te"$ of %ub and tail and $ressure gi(en b "akers............ First a fall we $ut %ub on a tail s%aft wit% a $ressure of J7 bar wit% $ilgri" nut t%en "aake ref "ark ?7 "" fr" fwd end of t%e %ub t%en $ut dial gauge on %ub and t%en a$$l full oressure and finalk reac% t%t $oint and again second "ark of ?7 "" fr" fwd end of t%e %ub and after $us%u$ "easure distance between two reference "arks noted...
by $ecreasin" te s#ee$ o- ##
t%e deli(er (al(e is a non return t$e t%ere is a collar below t%e s"al (al(e disc w%ic% wil release t%e $resure of t%e deli(er line before closing t%e (al(e..bt t%at del(r line wil re"ain $ri"ed wit%out of $ressure..
First a fall take ouut clinder %ead and re"o(e all (al(es fr" t%e %ead and t%en clean ur %ead wit% e"r $a$er and after cleaning we will $ut wooden $lug or teflon $lug in water inlet side and t%en co(er water outlet side wit% flanges and connect $ressure gauge and water $ri(iding $lug in one flange for testing t%en a$ol >.7 ti"es $ressure of a working $ressure t%en u c%ck an leakages so u will easil one "ain $recaution u will tke before leak use alwass tested c%ain block and $ut clinder %ead akwas on wood for a(oiding surface wear down ....
248
)ow do ou $erfor" Cl )ead $ressure test 1Au0 Engine2'
249
Refrigeration c%arging P %ig% $ressure side .w%'
25
action if oil co"es in e(a$orator
251
s%i$side (al(e is leaking in engine roo"5 w%at actions to be taken''
252
*n $arallel o$eration > gen taking "ore load t%an ot%er....reason''
>.go(ernor wrong setting5 or "alfunction 1less r$"2?.a(r $roble"5 less e0itation (oltage 5 diodes da"aged .loose connection in gen ter"inal bo0 or in bus bar connection H.less insulation in windings 7.walt "etter s%owing wrong reading ...
253
w%at all c%ecks to be done before fitting new stud..''
C%eck t%e t%read.$itc% of t%e t%read..si=e and lengt% of t%e stud s%ould be sa"e. Before fitting clear inside wit% WD H or wit% an rest re"o(er5or clear t%e t%read wit% $ro$er si=e of +a$...using c%eck nut fit t%e stud.
Bcse bro w%en u c%arge a li
I can brin" %# settin" to be%ow at/ #r so tat oi% "ets suc+e$ by co/#r. ;%ean te oi% se#arator ot "assin" by increasin" re- te/# by trott%in" con$r sw Nitro"en #ur"in" o- -u%% coi%
infor" co"$an5kee$ energenc bilge suction stand b... "anage wit out $u"$ing out for t%e "a0i"u" ti"e... if not under control wit infor"ing ad"inistration a$$ro(el we can $u"$ out.. if leak is s"all and "anageable wait for co"$an to arrrange drdock.. and get re$aired...1not to o$en si$side (al(es at sea or $ort unsafe $ractice2
+a/at
254
W% we blow t%roug% engine
+%is water in inco"$ressible..and can cause a se(ere da"age to liner ..to re"o(e t%s we blow t%roug% and obser(e t%e content co"ing out SW*+C) ;E!E; >+%e steering sste" %as two lube oil tank sste" wit% ? ra"s functioning on eac% sste". +%ele(el switc% >gi(es an initial alar" following a loss of oil fro" eit%er sste". *n nor"al o$eration one $ower unit $ro(ides %draulic $ower to all four ra"s.+%e causes for t%e loss of oil is "ainl due to broken %draulic $i$es and da"age in t%e ra"5 t%us t%e leakage oil drains to t%e bilge well.SW*+C) ;E!E; ?W%en no action is taken i""ediatel u$on t%e $re(ious alar"5 t%e loss of oil continuesand o(er a $eriod of ti"e t%is loss of oil intiates one or bot% of t%e le(el switc%es ?. +%is leads to t%e energi=ation of a solenoid o$erated ser(o (al(e causing a co"bined isolating (al(e and b$ass (al(e to o$erate. +%us s$litting t%e sste" suc% t%ateac% $ower unit su$$lies $ower to ? ra"s onl .At t%e sa"e ti"e t%is switc% auto"aticall starts t%e ot%er standb %elesaw $u"$ to assist t%e turning and building u$ t%e $ressure in t%e ra"s.SW*+C) ;E!E; +%is switc% will get acti(ated w%en t%ere is still no furt%er i"$ro(e"ent in t%e loss of oil on t%e fault side. *n suc% a situation t%esteering continues un9interu$ted if one unitis sto$$ed and t%us t%e rudder is turned wit% t%e %el$ of t%e ot%er unit sste" of ? ra"s onl5 isolating t%e fault one5 and t%is is called as e"ergenc steering.+%us t%e steering sste" is designed to work at %alf of t%e "a0i"u" tor"in in case of s"all s%i$s 1s%i$s>5 ton dia$lace"ent2.
255
w%at is steering sste" safet'
256
e0$lain $anting in boiler '
A series of $ulsations resulting fro" re$eated "inor e0$losions in t%e furnace of a s%i$,sboiler or fro" (ibration of a s%i$,s $lating due to sea loads.
257
banking of boiler
boiler banking is we s%ut t%e "ain stea" (al(e and $ressuri=e it so t%at it acts as a stand b fr $ro(idng stea"..$arallel banking is ? boiler in use.
258
%ow gra(it disc "aintain interface
259
W%at is $itc% of $ro$eller
w%en $ro$eller is rotating in unielding fluid5 distance "o(ed b fwd b s%i$ in one re(olution of $ro$eller
26
w% au0iliar engine $erfor"ance is not taken using i ndicator cards'
+%is is because unlike a ? stroke engine in H stroke engine t%e $iston co"es twice to +DC in a ccle5so we cant take indicator cards 5and instead co"$ression $ressure and co"bustion $ressure is taken::::::::: au0 engines run at %ig%er r$" .. so t%e $ressure fluctuations are so ra$id t%at t%e stlus will not be able to follow t%e $ressure fluctuations due to inertia lag of t%e s$ring and t%e gra$% obtained will not be a stead one unlike w%at u get in a ? stroke ..
+%e %ole dia"eter decides t%e $osition of t%e interface. +%e bigger t%e internal dia"eter5 t%e fart%er is t%e interface. !ice (ersa. +%e fart%er is t%e interface t%e $oorer is t%e se$aration. *t de$ends on t%e densit of t%e oil being se$arated. +%e denser t%e bigger internal dia"eter of D re
261
ou get a o"d alar" w%en s%i$ entering $ort5 wat ll be ur action'
262
)ow to find if $iston is in tdc ot%er t%an flw%eel "arkings.
263
%ow can we find t%e w%ic% tube is leaking in air cooler of A/E'
264
%ow do we c%eck rotoca$ wit%out asse"bling'
265
w% s%ock absorber is ter in fuel $u"$''' we r c%ecking air $ulsation t%rou% t%e t%readed %ole''''''
266
W)A+ *S F;AS) BAC ARRES+3R ' W)ERE *+ *S @;ACED A#D )3W *+ W 3RS '
267
w%at f
268
watc%kee$er in t%e w%eel %ouse called e/r t%at t%e rudder is not res$onding to t%e "o(e"ent of w%eel reasons'
269
%ow do ou asse"ble an o(er%auled fuel $u"$ of au0iliar engine' %ow t%e barrel is fitted'. w%at safet will ou obser(e'
27
w%at is s$ecialit of deli(er (al(e'
271
)ow @iston rod connected to cross%ead and %ow connecting rod is connected
272
Diff between EE5EB5C3M@3S*+E B3*;ER
273
*n air co"$. *ntercooler is single $ass and aftercooer is double $ass .w%'
274 275
working of te"$erature control (al(e of 4cw. Differences between cast iron n steel
276
)ow is gra(it disk able to "aintain an interface between oil and water in $urifier'
277 278
(it //as ti"ing ad(ances 5%ow $r 5$ower & e0% t"$ alters' one $late of %eat e0c%anger ru$turd5wat is t%e action'
*f u %a(e o"d alar" w%ile entering $ort dont $anic. C%eck (alidit of alar" if its actual or false. *nfor" bridge. -f $ossible to sto$ engines $ro(ided u %a(e tug boats "aneu(er t%ru t%e". Else $roceed in ds a%d B looking at ca"s%aft u %a(e to look for fuel ca" as w%en $iston is tdc it will %a(e fuel in4ection
Trassi Asse"ble it on to (al(e wit s$rings5 "ark t%e to$ n botto" of rotoca$s $osition wit a "arker5 use a "allet n %a""er it... *t s%ould rotate little fa %a""ering... as %ig% $r. fuel can da"age t%e seat of (/(5 so for t%e $rotection of (/( ti$ n seat5 sock absorber is fitted.... it is gas safet de(ice to $re(ent t%e back flow of fla"e ::.t%e %eat energ of fla"e is i""ediatel dissi$ated .t%us it $re(ents fla"e fr" going ot%er side fuel
1.air in te syste/ 2. buer s#rin" too wea+ or -au%ty. 3./a?or %ea+a"es in te y$au%ic %ine. 4. @na##ro#riate wor+in" o- te%e/otor syste/...
assemling procedure9 $ut t%e barrel fro" t%e to$ of t%e fuel $u"$ bod..ensure t%at o rings are in $lace1outside of t%e barrel5 w%ic% $re(ent t%e f.o leaking into t%e crankcase2. t%en %and tig%ten t%e cla"$ing bolts of t%e barrel. in(ert t%e fuel $u"$ bod and insert t%e rack. now $ut t%e control slee(e in suc% a wa t%at a notc% "ark on t%e control slee(e "atc%es t%e notc% on t%e rack...after t%at $ut t%e s$ring carrier and t%en s$ring.. finall t%e $lunger %as to be slided in wit% its ke into t%e slot of control slee(e.. $ut t%e $lunger seat on t%e base of $lunger and t%en $lace t%e guide slee(e onto it.. take t%e asse"bl to t%e drilling "ac%ine and slig%tl $ress t%e guide slee(e ?9"" and t%en fit t%e circli$.. t%en tig%ten t%e cla"$ing bolt of t%e barrel wit% s$ecified tor
*ts because in t%e >st stage t%e air te"$ gained is under li"it to be cooled b a single $ass but after ?nd stage w%ic% is a %ig% $ressure stage.. +%e te"$ rises abnor"all. So single $ass cooler won,t be able to control t%e te"$. For t%at we re before cooler n aftr cooler
$es#an$e dia"eter of gra(it disc is res$onsible for t%e interface. located at t%e outlet of water. e0erts back $ressure at water outlet. if inner dia is "ore5 "ore back $r.5 so interface s%ifts inwards nd (ice (ersa.so o$ti"u" dia to b selected
28 281
*f one gauge glass s%ows %alf and ot%er fluctuation5 w%at it "eans' +$e of "ain bearing lubrication5 is t%at sa"e in a/e and "/e.'
+%e one s%owing %alf is c%oked. +$e is sa"e %drodna"ic lubrication
282
e(en after $ulling fuel rack to =ero a/e not sto$$ing ... reasons''
Fuel rack setting to =ero is not $ro$er so e(en if u bring it to =ero $osition t%en also fuel will continue to disc%arge..so it is not sto$$ing ...close t%e fuel (al(e before t%e $u"$ and see if engine sto$s
283
Clinder %ead leakage detecting "et%ods'
After o(er%auling5 $lug all t%e cooling water %oles5fill t%e cooling s$ace of clinder %ead b water and t%e filling %ole wit% t%e flange containing $ressure gauge and filling air no==le.lncrease t%e $ressure to >.7 ti"es t%e working $ressure b $assing air t%roug% t%e air no==le and (isuall ins$ect t%e leak for water.
284
W% flw%eel is $ro(ided at aft of t%e engine' W % not forward'
Flw%eel %as to be $ut at t%e tor
285
M/e& au0 eng 9no0 e"ission is sa"e or different'
286
During bunkering5 bunker %ose bursts5 w%at course of actions to be taken'
@ress e"ergenc sto$ button. *f u don,t %a(e e",c sto$ on t%e "anifold5 s%out out S+3@ on barges walk talk. +%en *nfor" barge on walk talk. *nfor" our c%ief engineer on walk talk. *nfor" Dut 3fficer and t%e bridge. *""idiatel +ake $ro"$t and
287
W% screw $u"$ not used for "ain engine lubrication'
Because we need to "aintain a continous and large a"t of flow ;.3. in lubrication w%ic% is onl $ro(ided b sub"erged cenrifugal $/$
288
is t%ere an (ent $ro(ided in ref cr ankcase'
289
W%at r t%e "ountings and safties on 3il water se$erators5'
29
if oil $ressure does not de(elo$ on "ain air co"$ressor reason for t%is'
Defecti(e $ressure gauge5 wrongl connection after ins$ection5 lo suction strainer c%ocked5crankcase leaking5 lo le(el low5lo consu"$tion "ore due to "ec%anical da"age5conta"inated lo
291
)ow will u co"e to know t%at air cooler tube is l eaking w%ile running'
;eaking tubes can be a difficult and will be noticed w%en t%e water is found in t%e sca(enge drain sste". *t "ust be confir"ed t%at it is seawater and not condensation due to %u"idit.
292
)ow to find t%e leaking air cooler tube w%ile running'
#30 e"ission for "/e and a/e are different..because $eak $ressure in bot% are different ..
ventre%ie- vvoi% sensor #robe eatin" coi%Sacri=cia% ano$e #%u" at botto/#ressure "au"e test coc+
Trassi
1. 0e$uce en"ine s#ee$ an$ air te/#erature be-ore turbocar"er to be %ess tan 65L; 2. ;ut o te coo%in" water an$ re/ove en$ covers 3. ;over one en$ o- tubes co/#%ete%y wit a tic+ seet o- ?ointin". A##%y soa# water at te oter en$. 4. *ea+in" tube wi%% "ive o bubb%es. 5. (%u" te %ea+in" tube wit woo$en #%u"s or co##er ta#ere$ #%u"s. Trassi
293
)ow to re$lace air cooler tubes'
294
Boiler Blow down
295
Mat is "ee 0in"
296
Ad(antage of water tube boiler
After identifing t%e da"aged tube5 t%e e0$anded $art of t%e tube is s%a(ed off on bot% sides wit% a drill bit lea(ing about 7 "" in t%e tube $late. +%e tube9setting tool is inserted into t%e s%a(ed $art of t%e tube and %it wit% t%e %a""er. +%is wa t%e tube can be $us%ed out of t%e tube $late till t%e tube end is gras$ed wit% a wrenc%. +%e w%ole lengt% of t%e tube is $ulled out wit% t%e %el$ of a wrenc%. *n case t%e tube cannot be re"o(ed b t%is "et%od5 t%en e0$anded $arts of bot% ends are s%a(ed off co"$letel. +%e tube9setting tool is t%en used. A s$are tube is inserted into t%e tube %ole and ad4usted suc% t%at it e0ceeds t%e face of t%e tube $late b >.7 ""s on t%e cooling water inlet side. +%e $ro4ected $art of t%e tube is e0$anded wit% bell e0$ansion tool. +%is $art of t%e tube would not be inserted into tube $late w%en t%e tube e0$ander is used. +%e tube e0$ander is used wit% t%e %el$ of a drill "ac%ine or "anuall. +%e tube can be %eld on ot%er side if t%e tube turns w%ile e0$anding. @us%ing forward t%e tube e0$ander to about ?/?7 ""s e0$ands t%e tube. W%en re(ersing t%e drill "ac%ine5 t%e tube e0$ander "ust be drawn out of t%e tube. After e0$anding bot% ends5 t%e tubes can be $ressure tested.
3$en (al(es in order 1>25 1?25 125 and close in re(erse. +%e blow down (al(e ad4acent to t%e boiler 1?2 s%ould be full o$en to $re(ent cutting of t%e (al(e seating faces. +%e rate of blow down is controlled b t%e second blow down (al(e 12. #e(er lea(e t%e boiler unattended w%en blowing down and ensure all (al(es are full closed after blowing down. A %ot drain $i$e indicates a leaking blow down (al(e. >2 S%i$ Side (/( ?2!/! attact%ed to t%e boiler s%ell 2 !/( ad4acent to (/( no.?
Connecting t%e botto" of t%e furnace to t%e boiler s%ell $lating is a sea"less 3geeT ring. +%is ring is $ressed out of t%icker $lating t%an t%e furnace t%e greater t%ickness is necessar since circulation in its (icinit is not as good as elsew%ere in t%e boiler and de$osits can accu"ulate between it and t%e boiler s%ell $lating. )and %ole cleaning doors are $ro(ided around t%e circu"ference of t%e boiler in t%e region of t%e 3geeT ring. +ell9taleT %oles drilled at e
1.i" eciency '"enera%%y "reater tan 85 , ence re$uce$ -ue% consu/#tion. 2.F%eibi%ity o- $esi"n O i/#ortant s#ace consi$eration. 3.;a#ab%e o- i" out#ut 'i.e. i" eva#oration rate,. 4.i" #ressures an$ te/#eratures i/#rove turbine #%ant eciency. 5.F%eib%e in o#eration to /eet >uctuatin" $e/an$s o- te #%ant O su#ereat contro% ra#i$%y res#onsive to can"in" $e/an$s. 6.Eenera%%y a%% sur-aces are circu%ar ence no su##ortin" stays are rePuire$. 7.Stea/ can be raise$ ra#i$%y -ro/ co%$ i- te occasion $e/an$s '3 to 4 ours co/#are$ to 24 ours -or s/o+e tube or =re tube boi%ers, because o- te #ositive circu%ation. 8.;onsi$er a =re tube or s/o+e tube boi%er an$ a water tube boi%er wit si/i%ar eva#oration rates te water tube boi%er wou%$ be co/#act an$ re%ative%y %i"t by co/#arison an$ its water content wou%$ be about 7 tonnes or %ess co/#are$ wit te s/o+e tube or =re tube boi%erQs 3 tonnes. 9.Mit $oub%e casin" ra$iation %oss can be cut to 1 or %ess.
297
W% Refrigeration Co"$ressor +akes Suction fro" Crankcase
In%i+e air co/#ressors it is co//on in reci#rocatin" ty#e re-ri"eration co/#ressors to ta+e suction -ro/ cran+case. ut%et -ro/ te eva#orator coi%s is %e$ to te co/#ressor cran+case. Tere are a -ew a$vanta"es wit tis $esi"n. 1., Since cran+case is #ressuri
To ca%cu%ate te c%earance vo%u/e o- a cy%in$er wit concave or conve #iston crown -o%%ow te ste#s be%ow. 1.Ree# te cy%in$er ea$ intact wit cy%in$er ?ac+et an$ cec+ -or #ro#er ti"tenin". @- it is not #ro#er%y ti"tene$ ti"ten it wit a torPue wrenc as #er te instruction /anua%. 2.#en te -ue% in?ector or -ue% va%ve -ro/ te cy%in$er ea$. 3.Brin" te #iston s%i"t%y o to# $ea$ center by /eans o- a turnin" bar or turnin" "ear /otor. 4.Ta+e a +nown Puantity o- tic+er oi% an$ #our it in to te cy%in$er ea$ ti%% te cy%in$er is -u%% o- oi% u# to te -ue% in?ector o%e or any convenient %eve%. A%ways use tic+er oi% because use o- very tin oi% /ay %ea+ trou" te #iston rin" c%earance. 5.0ecor$ te Puantity o- oi% #oure$ in to te cy%in$er an$ s%ow%y turn te >ywee% so tat te #iston a##roaces T;. Now te oi% wi%% start co/in" out -ro/ te cy%in$er trou" te in?ector o%e eact%y ti%% te ti/e #iston reaces T;. 6.;are-u%%y co%%ect te oi% witout s#i%%a"e an$ /easure te e#e%%e$ Puantity '*, o- oi%. Te $ierence o- tis /easure$ Puantity o- oi% wit te initia% vo%u/e o- oi% #oure$ wi%% "ive te c%earance vo%u/e o- a cy%in$er inc%u$in" te vo%u/e o- te in?ector o%e. Now te c%earance vo%u/e o- a cy%in$er can be ca%cu%ate$ by subtractin" te -ue% in?ector o%e vo%u/e wic can -oun$ /ate/atica%%y by te $ia/eter an$ te ei"t o- te o%e. Tus te c%earance vo%u/e o- a cy%in$er wit an irre"u%ar sa#e o- a #iston crown an$ cy%in$er ea$ is ca%cu%ate$.
298
)ow to find out t%e clearance (ol. of a con(e0 s%a$ed $iston engine
299 3 31 32 33
W% $lates of $urifier are conical and not straig%t' can we c%ange $urifier "otor wit% an ot%r "otor ' draw %draulic sste" for windlass 9M? bolt5w%ic% s$anner ou use 9no"inal dia"
34
*n $urifier (ertical s%aft two bearings are fitted one ball and ot%er roller5 w%'
35
tuck sound co"ing fro" "/e reasons
36
38 39
draw turboc%arger of ur s%i$ ' u r o(er%aulling centrifugal $u"$ ..u %a(e o$ened cou$ling bolts and re"o(ed "otor fro" $u"$ now u r tring to re"o(e $u"$ but it is stucked ..%ow will u re"o(e' $ur$ose of diffuser and slee(e' %ow will u c%eck trueness of s%aft '
31
can we blow t%roug% "/e in astern direction'
es u can. it de$ends in w%ic% direction our ca" sto$$ed. in sa"e direction u do blow t%ru
311
)ow to c%ange a gasket5 wit%out re"o(ing t%e (al(e fr" its $lace''
Re"o(e bolts of one side flange...re"o(e gasket wit% blade..clean surface..$ut ke or screw dri(er in between flange so we get s$ace to $ut new gasket...$ut new gasket and bo0 back...re$eat t%e sa"e for ot%er side....in between two flanges *.e. (al(e side and $i$e side $ut a screw dri(er or a ke..."ake so"e s$ace...$ut new
37
$es#an$e
orion orion u$$er bearing to take (ibration in %ori=ontal direction...lower bearing to take (ertical t%rust if a0ial cl arance of $iston ring will incrase t%en it will sla$ & sound co"e
orion orion orion orion
312
sul$%uric acid #/> used in boiler water test 5 w%at is #/>'
#or"alit9#or"alit is a "easure of concentration e 5 of SG> of 3G>J "olar "ass G?>?>>JHGN6g "olecular weig%t of )?S3HG N6 g"s
313 314 315 316
we use co$$er tubes in refrigeration sste".. Can an one' @lease 4ustif @re$arations for ME for Sail off @late t$e )eat E0c%anger diagra" Boiler Manual o$eration
317
if we $ut two conductors one of co$$er and one of iron in a electorle solution sa water t%en fro" w%ere will t%e electrons flow
318 319 32 321 322 323 324 325 326
draw $iston crown for ? stroke engine if t%e disks in t%e $urifier were %ori=ontal t%en w%ta will be t%e $urification effect Reasons for low out$ut of co"$ressor. Maintenance on o(ernors. Ca$acit control in Ref. sste". )ow to o$en if bonnet of SD#R (/( is stuck C3@ of refrigeration sste" Stuffing Bo0 3(er%aul #o"ogra" Diagra"
327
W%at %a$$en if M/E one unit fuel su$$l is cutoff.
328
Draw and e0$lain )draulic o(ernor -se of Co"$resator in go(ernor. )ow do 3(er s$eed +ri$ work in A/E. )ow #30 can be reduced for" M/E. W%at are all i"$ortant +ri$ in M/E. And in 3t%er Mac%iner. *f unloader is not working ' Can u start t%e co"$ressor. '
329 33 331 332 333 334 335 336 337 338 339 34
W%ats t%e tec%nical ter" in boiler W%en stea" is not used but boiler is ke$t in war" u$ condition''
343 344 345
/isra /isra /isra
/isra /isra /isra o$en co(er nuts t%n close (al(e to 4ak u$ bonet co(er
3(er all $ower loss about $er cent and t%e unit will be running like ideal if running for long ti"e t%ere is a c%ance of ot%er unit o(er load and t%ere is a c%ance of une(en bearing worn out::::::...And also engine turboc%arge surging take $lace.5(ibration5 %ig% e0%aust te"$..etc
Sar/a Sar/a Sar/a Sar/a Sar/a Sar/a
Banking of boiler
Boiler @ilot Burner 3/) Du$le0 Filter: W% used in F3'
A/E +3@ E#D BEAR*# 3!ER)A-; 3? calibration in igg starting boiler "anual distance between t%e electrodes of $ilot burner
Sar/a
Stuffing bo0 ins$ection
c%eck clearance between eac% ring and casing %alf5 c%eck butt clearance after u stagger all rings close ? eac% oder5 c%eck s$ring tension w.r.t distance fro" wic its being $ulled in ter"s of #ewtons5 c%eck condition of t%e oil scra$$er ring la"elae1 blades2.
W% su$er long stroke & its significance.
Working $rinci$le of ear $u"$..Draw and e0$lain t%e sa"e.
341
342
> # solution would re
(i#%ani
)ow cross%ead is lubricated5its $ressure and w% it %ig%er t%an "ain bearing lub oil $ressure. +$es of co"$ression & its res$ecti(e e
(i#%ani
W% centrifugal $u"$ and gear $u"$ are of different t$es as bot% %a(e rotating "asses.
(i#%ani
(i#%ani
346
Enclosed S$ace Entr @er"it5 e0$lain' 347
348
349 35 351 352 353 354 355 356
w%ic% all $laces it is re
(i#%ani
@3WER CA;C-;A+*3#. )3W +3 F*#D 3-+ ME@. ME@ 3F 3-R E#*#E. )3W +3 CA;C-;A+E S)AF+ @3WER
(i#%ani
B3*;ER M3-#+*#S. -SE 3F !E#+S5 DRAW EAS*# EAR5 W) EAS*# EAR -SED' ;*F+*# @RESS-RE 3F SAFE+ !/ !. SAFE+ !/! ;*F+*# @RESS-RE 3F S-@ER)EA+ER.
(i#%ani
@R*#C*@;E 3F CE#+R*F-A; @-M@' W) CE#+R*F-A; @-M@ #3+ @3S*+*!E D*S@ @-M@' #EED C;EAR EU@;A#+*3#. Boiler low le(el occuring and is faster reason
(i#%ani
u r called t%at t%e steering is not res$onding w%at c%ecks u do t%en .
(i#%ani (i#%ani
S$ring air fnction na"e ? function of s$ring outside d fuel $u"$ in B&W engines )w to.kno d MAC r wrking $ro$el b luking onl at d @ressure uages. l$ n %$ +$e of t%read:.Draw all t$e wit% angle and distinguis%ed t%e".'
rion
)ow to "easure $itc% of t%read'.....*f $itc% gauge not $resent t%en %ow u "easure $itc%' !ernier calli$er =ero setting' W%at is d "ean of J% 7% in welding' airco"$ressor (al(es o(er%aul n $r testing
)ow to c%eck working of "ac unloader if t%e disks in t%e $urifier were %ori=ontal t%en w%ta will be t%e $urification effect if we $ut two conductors one of co$$er and one of i ron in a electorle solution sa water t%en fro" w%ere will t%e electrons flow
We "easure t%e distance btwn two consecuti(e t%read wid %el$ of (ernier calli$er..
rion rion rion
*n t%e sste" w%ere t%e unloader is a solenoid o$erating (al(e w%ic% released air fro" oil se$arator5 t%e line going in to t%e drain can be o$ened u$ and ke$t to c%eck if air is going out for t%e s$ecified ti"e of solenoid o$eration..it also tells u if t%e solenoid %as started functioning fault too if leaks are %a$$ening
