CSWIP 3.1 ( WELDING WELDING INSPECTOR ) MULTIPLE MULTIPLE CHOICE QUESTION AND ANSWER
01. When “ H2 control” is specified for a manual metal arc welding project , the electrode would normally be !a" !a" #ell #ellul ulos ose. e. !b" $ron $ron o%ide. o%ide. !c" &ci &cid. (d) Basic Basic.. 02. 'ou 'ou would with certainty recogni(e a hydrogen controlled flu% co)ered electrode from $ts !a" !a" #olo #olour ur.. !b" !b" *eng *ength th.. !c" !c" +rad +radee ame. ame. (d) AWS / BS3! C"d# L#$$#%. L#$$#%. 0-. When manual metal arc welding welding is being carried out on an open construction site, which group of welders are the most most liely to re/uire continuous continuous monitoring !a" (&) !c" !d"
#oncrete #oncrete shutter shuttering ing welding welding teams. teams. Pi'# Pi'# #di*+ #di*+ $#a,. $#a,. later later welder welders. s. lant maintenance maintenance welders. welders.
0. 'ou notice notice manual metal arc electrodes, stripped of flu%, are being used as filler wire for +$3 welding. 'ou would object because !a" $t is too e%pensi)e. e%pensi)e. !b" +he wire would be too thic. (c) T-# #d #d ,#$a c",'"si$i"* c",'"si$i"* ,a %"*+. %"*+. !d" +he wire wire is is too shor short. t. 04. When open site woring, serious porosity in metal metal arc welds is brought to your attention. What would your in)estigate !a" !a" !b" (c) !d"
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5lec 5lectr trode ode type type.. ower ower plant plant type type.. E#c E#c$% $%"d "d## s$"%a s$"%a+# +#.. 6ay temper temperatu ature. re.
1 8 9
09. +he steel composition composition in a structural contract is is changed from 0.14: carbon, 0.9: manganese to 0.2: carbon, 1.2: manganese. ;ight this influence the incidence of !a" !a" (&) !c" !d"
oro orosi sity ty.. C%aci*+ C%aci*+ i* $-# #d #d a%#a. a%#a.
0=. >ne of the following following alloys is is non?magnetic. Which Which !a" !b" (c) !d"
: #hromiu #hromium m ;olybden ;olybdenum. um. 12 : #hro #hromi mium. um. A0s$#*i A0s$#*i$ic $ic S$ai*# S$ai*#ss ss S$##. S$##. @ : ic icle le 7teel 7teel..
0A. When +$3 welding &ustenitic 7tainless 7tainless 7teel pipe, &rgon &rgon gas baing is called for +his is to !a" !b" !c" !d"
P%##*$ "2ida$i"*. re)en re)entt under bead bead cracing cracing.. re)en re)entt poro porosit sity y. #ontrol #ontrol the penetration penetration bead shape. shape.
0@. re?heating a carbon steel manual metal metal arc welding is carried carried out to minimi(e the ris of !a" !b" (c) !d"
7catte 7cattered red porosit porosity y Worm hole porosit porosity y Pa%#*$ Pa%#*$ ,#$a ,#$a c%ac c%aci*+ i*+ *ac of penetration penetration
10. $n
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2 8 9
09. +he steel composition composition in a structural contract is is changed from 0.14: carbon, 0.9: manganese to 0.2: carbon, 1.2: manganese. ;ight this influence the incidence of !a" !a" (&) !c" !d"
oro orosi sity ty.. C%aci*+ C%aci*+ i* $-# #d #d a%#a. a%#a.
0=. >ne of the following following alloys is is non?magnetic. Which Which !a" !b" (c) !d"
: #hromiu #hromium m ;olybden ;olybdenum. um. 12 : #hro #hromi mium. um. A0s$#*i A0s$#*i$ic $ic S$ai*# S$ai*#ss ss S$##. S$##. @ : ic icle le 7teel 7teel..
0A. When +$3 welding &ustenitic 7tainless 7tainless 7teel pipe, &rgon &rgon gas baing is called for +his is to !a" !b" !c" !d"
P%##*$ "2ida$i"*. re)en re)entt under bead bead cracing cracing.. re)en re)entt poro porosit sity y. #ontrol #ontrol the penetration penetration bead shape. shape.
0@. re?heating a carbon steel manual metal metal arc welding is carried carried out to minimi(e the ris of !a" !b" (c) !d"
7catte 7cattered red porosit porosity y Worm hole porosit porosity y Pa%#*$ Pa%#*$ ,#$a ,#$a c%ac c%aci*+ i*+ *ac of penetration penetration
10. $n
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2 8 9
11. Dor open site manual metal arc welding the following e/uipment is a)ailable. Which would you choose for safe woring . !a" !b" !c" (d)
7ingle 7ingle operat operator or transf transformer ormer ;ulti ;ulti operator operator transforme transformer r 8 6# composite composite power unit Di#s# #*+i*# #*+i*# d%i#* d%i#* ,"$"% +#*#%a$"% +#*#%a$"%
12. $f 7ubmerged arc welding is to to be used to mae butt welds, welds, Which would you you be most critical of !a" !b" (c) !d"
+he root root gap gap toler tolerance ance +he angle angle of prep prepara arati tion on T-## %""$ T%""$ ac# ac# id id$$+he gas cut finish finish
1- 6uring #>2 welding, the arc length length is most liely to be affected by !a" (&) !c" !c" !d"
+he wire wire diamet diameter er T-# c0%%# c0%%#*$ *$ %#$0%* %#$0%* c"**#c$i"* c"**#c$i"* +he +he gas gas flow flow rat ratee +he torc torch h to wor wor angl anglee
1. reheating for arc welding applies to !a" (&) !c" !d"
&ssemb &ssembly ly weldin welding g only Ass#,& Ass#,& a*d a*d $$ac ac #di*+ Eoints Eoints o)er o)er 24mm 24mm thic thic only only #rucif #ruciform orm welds welds only only
14. 'ou 'ou see a welder using an o%y?acetylene flame with a long feathered inner cone. What would be the effect of this on a carbon steel (a) !b" !c" !d"
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T-# #d #d c"0d c"0d -a%d -a%d a*d a*d &%i$$# &%i$$# +he weld weld metal metal could could be too too soft soft +here will be no effe effect ct on the the weld weld +he weld weld will will ha)e ha)e underc undercut ut
- 8 9
19. & welder /ualification test is to )erify (a) !b" !c" !d"
Si " $-# #d#% +he /uality of the materials +he non?destructi)e test procedures +he manufacturing method
1=. & fabricating procedure calls for fillet welds to be “ blended in “ by grouping. +his is to influence !a" (&) !c" !d"
H & F. cracing 4a$i+0# i# Gesidual stress 'ield strength
1A. Cend test specimens ha)e been taen from a 24mm thic carbon steel butt weld. Which would show lac of inter?run fusion (a) !b" !c" !d"
Sid# *d Goot bend Dace bend 3uided bend
1@. *amellar tearing has occurred in a steel fabrication. Cefore welding could it ha)e been found by !a" !b" !c" !d"
?ray e%amination 6ye penetrant
20. 'ou are to o)ersee the arc welding of some machined fittings and find they are cadmium plated. Would you (a) !b" (&) (c)
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ermit it to proceed ermit it to proceed with fume e%traction S$"' $-# "'#%a$i"* a$ "*c# &d)ise the welder to drin mil and proceed
8 9
21. +he unit of Eoules would be used to measure !a" +ensile strength (&) I,'ac$ #*#%+ !c" Hardness !d" 5lectrical resistance
22. 7ubmerged arc welding is a process generally gi)es !a" !b" !c" (d)
7lag free welds *ow penetration *ow dilution Hi+- -#a$ i*'0$
2-. Which of the following does not re/uire baing or drying (a) !b" !c" !d"
E 515 5 =01A 7ub arc flu% with Casicity $nde% of 2 7ub arc flu% with Casicity $nde% of -
2. & welder and procedure re?/ualification would be re/uired !a" !b" !c" (d)
24.
+ensile strength can be increased in steel by !a" !b" (c) !d"
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When the run out date of the procedure has been reached 5)ery 'ear When changing from day to night shift wor W-#* $-#%# is a c-a*+# i* a* #ss#*$ia a%ia&#
&nnealing 3al)anising Addi$i"* " ca%&"* #asting
4 8 9
29.
Which of the following always occurs in the parent material !a" (&) !c" !d"
2=.
+o pre)ent the hardening and cracing of High #arbon 7teel plate when flame cutting it is ad)isable to (a) (&) (c) (d)
2A.
P%#6-#a$ $-# 'a$# 7oa the plate in oil #ool the plate /uicly after cutting $ncrease the cutting >%ygen pressure
Ge?crystalli(ation during annealing is used to mae steel (a) (&) (c) (d)
2@.
Hydrogen cracs La's a*d a,i*a$i"*s #enter line cracs orosity
S"$#% Harder +ougher 7tronger
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'ou should always refer to a higher authority for guidance when (a) #racs appear during welding (&) +he welder will not follow your instructions (c) $nstructions are missing in the specification or contract documents (d) A " $-# a&"#
-0.
7patter may be finely controlled during ;$3 8 ;&3 welding by (a) Ad<0s$i*+ $-# i*d0c$a*c# c"*$%" (&)
2 gas (c) $ncreasing the arc )oltage (d) Welding with no gas
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RE4 76 CSWIP BOO8 PAGE 9 1;.=
9 8 9
-1. Datigue testing is used to test welds (a) U*d#% ccic "adi*+ (&)
-2. &rgon I 2 : >%ygen is used when welding !a" (&) !c" !d"
High carbon steels A0s$#*i$ic s$ai*#ss s$##s &luminum ;artensite stainless steels
--. $n C7 9-@ and C75n @@ the first digits of the electrode classification indicate (a) T#*si# a*d i#d s$%#*+$(&) +oughness (c) 5lectrode coating (d) 5lectrode efficiency
-. #ellulosic coatings are generally used because of (a) +heir low hydrogen content (&) T-#i% -i+- '#*#$%a$i"* c-a%ac$#%is$ic (c) +heir high strength weld deposit (d) +heir high weld toughness )alues
-4. orosity would mostly occur in which of the following !a" !b" (c) !d"
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When ;;& welding semi de?o%idi(ed steel When ;$3 8 ;&3 welding fully de?o%idi(ed steel W-#* #di*+ TIG #di*+ *"* d#"2idi>#d s$## When 7ub &rc Welding semi illed steel
= 8 9
-9. When welds ha)e a depth to width ratio of higher than 21 it is possible that (a) !b" !c" !d"
C#*$#%i*# C#*$#%i*# c%acs c%acs ,a a''#a% +he fusion fusion boundary boundary will be outside outside the H&F +he H&F H&F will will be too too narro narrow w +he weld weld will will be non non magnetic magnetic
-=. >n which of the following would you not use ;$ inspection !a" & low carbon steel butt b utt welded t joint !b" A* A0s$#*i$ic S$ai*#ss s$## i#$ #d#d T <"i*$ !c" & medium carbon steel fillet welded lap joint !d" &ll of the abo)e
-A.
$ncreasing the arc energy input of a welded joint will !a" !b" (c) !d"
-@.
$ncrease $ncrease the strengt strength h of the joint $ncrease $ncrease the toughnes toughnesss of the the joint I*c%#as# I*c%#as# $-# +%ai* si># si># " $-# #d a*d a*d HA? 6e?crease 6e?crease the the width width of the H&F H&F
$n 7ub &rc We Welding lding , e%cessi)e flu% flu% melting will result result from from (a) I*c%#asi*+ $-# a%c "$a+# (&) 6ecreasing the arc )oltage (c) $ncreasing the tra)el speed (d) $ncreasing the wire feed speed
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0. +o C7 @@ part 2 , which of the following is is true for a welding symbol !a" +his or arrow arrow side of the the joint goes on top top of the reference reference line (&) T-is "% a%%" a%%" sid# " $-# <"i*$ +"#s " $-# %##%#*c %##%#*c## i*# !c" +his or arrow arrow side of the joint goes in the middle middle of the reference reference line !d" &ll of the the abo)e abo)e
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A 8 9
1. $nternal lac of fusion fusion defects can be normally found found by using !a" !b" (c) !d"
enetr enetrant ant test testing ing $mpact $mpact tests tests Sid# Sid# * *d d $#s$ $#s$ Hardnes Hardnesss test test
2. Which of the following steel structures structures has the highest hardness (a) !b" !b" !c" !c" !d"
Ma%$# Ma%$#*si *si$# $# &ust &usteni eniti ticc Derr Derrri riti ticc &ll ha)e the the same same hardness hardness
-. &n $J$ would would be used in radiography to assess (a) !b" !c" !d"
I,a+# I,a+# 0a 0ai$ i$ +ype +ype of steel steel 6ensit 6ensity y of a graph graph +ype +ype of welding welding process process used used
. oor penetration would would be found in ;$3 8 ;&3 welded steels when using !a" !a" !b" (c) !d"
&rgo &rgon n I 20 : #>2 #>2 #>2 P0%# P0%# A%+" A%+"* * &rgon &rgon I 4 : #>2
4. $n which of the following steels steels are you you most liely to find H2 induced weld metal cracing after welding !a" !a" (&) !c" !d"
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*ow *ow carb carbon on stee steell Hi+Hi+- s$%#*+$s$%#*+$- " " a" s$## s$## &usteniti &usteniticc stainl stainless ess steels steels 1 : icel icel steel steel
@ 8 9
9. 7ilicon is added to electrode coatings as !a" !b" (c) !d"
& slippi slipping ng agent agent & slag slag form former er A d#6" d#6"2i 2ida da*$ *$ & colo colouri uring ng agent agent
=. +he main reason degreasing agents should always be dried from metals prior prior to welding, is because they are liely to !a" !b" !c" !d"
$ncrease the arc )oltage roduce ha(ardous fumes 7low down the welding speed P%"d0c# ac " 0si"* d##c$s
A Which of the following processes processes would be most most prone to lac lac of fusion defects (a) (&) (c) (d)
ulsed arc ;$3 7pray transfer ;$3 Di' $%a*s#% $%a*s#% MIG 7ubmerged arc
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@. &djusting the inductance control in dip transfer ;$3 ;$3 8 ;&3 welding, will control (a) +he pulse rate (&) +he gas flow rate (c) T-# a,"0 a,"0*$ *$ " s'a$$ s'a$$#% #% (d) +he arc )oltage
RE4 76 CSWIP BOO8 PAGE 9 1;.=
40. Which of the following is an inspection point in 7ub &rc Welding Welding (a) 402 ,#s- si># (&) 3as type (c) +ungsten si(e (d) 3as flow rate
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10 8 9
41. Why is Hot ass so called !a" (&) !c" !d"
Cecause it is applied at a high amperage B#ca0s# i$ is a''i#d -#* $-# %""$ is s$i -"$ Cecause it could cause hot shortness Cecause it heat treats the root
42. Which of the following is not inert gas !a" !b" (c) !d"
&rgon enon Ca%&"* di"2id# Helium
4-. Why is a welding arc shielded !a" !b" (c) !d"
+o eliminate hydrogen +o retard the cooling rate of the weld T" #i,i*a$# $-# a$,"s'-#%# +o ensure ma%imum heat input
4. Which welding process is considered to be the most )ersatile !a" !b" !c" (d)
7&W +$3 ;$3 8 ;&3 MMA
44. +he H&F associated with a weld is !a" +he melted portion of the parent plate (&) T-# a%#a i,,#dia$# ad
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11 8 9
49. & crac in a weld (one !a" !b" !c" (d)
is repairable &lways results in a cut out and complete re?weld $s acceptable up to 2mm in length Ma %#'ai%#d "% c0$ "0$ d#'#*di*+ "* s'#ciica$i"* %#0i%#,#*$s
4=. $f the amperage is too low during the welding of a root bead, the possible result would be (a) (&) (c) (d)
*ac of penetration *ac of fusion +he free(ing of the electrode A " $-# a&"#
4A. re?heating prior to welding !a" !b" !c" !d" (#)
;ust always be carried out eed not be carried out if post heat treatment is to follow welding is always carried out using gas flames &ll of the abo)e N"*# " $-# a&"#
4@. #old lap is another term for (a) !b" !c" !d"
Lac " 0si"* *ow amperage
90. When a medium to high carbon steel is /uenched !a" (&) !c" !d"
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$t becomes malleable I$s -a%d*#ss i*c%#as#s $t becomes ductile +he plasticity is increased.
12 8 9
91. +he +$3 welding process utili(es an electrode that is (a) (&) (c) (d)
#ellulosic N"* c"*s0,a&# #onsumable one of the abo)e
92. ¬her name for 7ucbac in the root of a weld is (a) C"*cai$ (&) #on)e%ity (c) *>G (d) Goot undercut
9-. >ne of the ad)antages of a multi?pass ;;& weld is that it generally produces a !a" !b" !c" (d)
High tensile strength High degree of ductility #oarse grain structure 4i*# +%ai* s$%0c$0%#
9. & ormalising heat treatment process is carried out by !a" Heating the metal just abo)e 940K# . (&) Tai*+ $-# ,#$a a&"# $-# %#6c%s$ai>a$i"* $#,'#%a$0%# a*d a"i*+ $" ai% c"" . !c" +aing the metal abo)e the re?crystalli(ation temperature and allowing to furnace cool. !d" +aing the metal abo)e the re?crystalli(ation temperature and /uicly cooling by immersing.
94. +he e%tent of the changes in microstructure will depend on the following !a" !b" !c" (d)
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;aterial composition Heat input +he rate of cooling A " $-# a&"#
1- 8 9
99.
+he Critish code for )isual inspection re/uirements is !a" !b" !c" (d)
99.
& code of practice for )isual inspection should co)er the following !a" !b" !c" !d"
9=.
*inear misalignment. $ncorrect tilt angle. 6iffering root face widths. A " $-# a&"# .
RE4 76 CSWIP BOO8 PAGE 9 3.@ / 15.
'ou notice a )ery “ )eed ” ripple shape. +his is most liely caused by !a" !b" (c) !d"
=0.
5%cessi)e root face width. 5%cessi)e root gap si(e. *ow current setting. B"$- A C.
$ncomplete root fusion would certainly be caused by !a" !b" !c" !d"
9@.
B#"%# D0%i*+ a*d A$#% #di*+ ac$ii$i#s . Cefore welding acti)ities only. &fter welding acti)ities only. one of the abo)e.
$ncomplete root penetration in a butt joint could be caused by !a" !b" !c" (d)
9A.
C7 A=2 C7 @@ C7 A=0 N"*# " $-# a&"#
oor consumable choice. Welding position. E2c#ssi# $%a# s'##d. one of the abo)e.
“ +oe Clending “ is important as it may affect !a" +oughness. (&) 4a$i+0# i#. !c" enetration. !d" &ll of the abo)e.
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1 8 9
=1.
7lag inclusions may occur with !a" !b" !c" (d)
=2.
;anual ;etal arc. ;etal $nert 3as. 7ubmerged &rc Welding. B"$- A C
=-.
5%cessi)e amps. 5%cessi)e )olts. 5%cessi)e tra)el speed. A " $-# a&"#.
=.
3i)e information to the welder. 3i)e information to the inspector. 3i)e “ #onfidence “ to a product. A " $-# a&"#
Gef CWSIP B"" Pa+# .1
&n essential )ariable may !a" !b" !c" !d"
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Gef CWSIP B"" Pa+# 3.
& welding procedure is useful to (a) (&) (c) (d)
=4.
Gef CWSIP B"" Pa+# 3. / 15.
#hange the properties of the weld. $nfluence the )isual acceptability. Ge/uire re?appro)al of the weld procedure. &ll of the abo)e.
14 8 9
=9.
& magnifying glass may be used during )isual inspection by typical magnification would be !a"
!c" 40 L 100 !d" one of the abo)e.
==.
When )isually inspecting a fillet weld , it would normally be “ 7i(ed by “ !a" !b" !c" (d)
=A.
+he leg lengths. +he actual throat thicness. +he design throat thicness. B"$- A C
& planar defect is !a" !b" !c" !d"
=@.
$ncomplete fusion defects. 7lag inclusion. $ncomplete penetration. B"$- A C .
enetrant inspection and ;$ are mainly used to !a" !b" !c" !d"
A0.
&id )isual inspection. Cecause the application standard says so. +o confirm “ Misual uncertainties ”. &ll of the abo)e
6efects out side of the limits specified in a standard should always be !a" !b" !c" !d"
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Gef CWSIP B"" Pa+#1.13
Gepaired. Geported to a “ senior person “. Gadio graphed. &ll of the abo)e.
19 8 9
A1.
;$3 welding tends to be susceptible to lac of fusion problems. +his is because of !a" !b" !c" !d"
A2.
;;& electrode can be grouped into $-%## ,ai* $'#s . +hese are !a" !b" !c" !d"
A-.
7olidification problems. Hydrogen problems. 5%cessi)e stresses. A " $-# a&"#.
Welding a single M butt with laminations showing on the side wall may gi)e rise to !a" !b" !c" !d"
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oor access. *oss of gas shield. “ 6irty “ materials. A " $-# a&"# .
#racs in welds maybe due to !a" !b" !c" (d)
A4.
Basic C#0"sic a*d R0$i# . eutral , #ellulosic and Gutile. Casic , #ellulosic and neutral. one of the abo)e.
+he main causes of porosity in welded joints are !a" !b" !c" !d"
A.
oor maintenance of e/uipment. I* c"%%#c$ s#$$i*+s . oor inter run cleaning. &ll of the abo)e.
La,#a% $#a%i*+ . 7olidification cracing. ;artensite.
1= 8 9
A9.
With reference to a root penetration bead , you could certainly assess !a" !b" !c" (d)
A=.
Goot fusion and penetration. Goot conca)ity. Curn through A " $-# a&"#
& fatigue failure is characteristic by the appearance of the fracture surface. $t would be (a) Gough and torn. (&) “ #he)eron “? lie. (c) S,""$-. (d) one of the abo)e.
AA.
“ 7tray arcing “ may be regarded as a serious defect. +his is because !a" !b" (c) !d"
A@.
>)erlap in welds could be influenced by !a" !b" !c" (d)
@0.
oor welding techni/ue. Welding process. Welding position. A " $-# a&"#.
Dlame cut preparation may, during welding, increase the lielihood of !a" !b" !c" !d"
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$t may reduce the thicness dimension of a component. $t may cause li/uation cracs. I$ ,a ca0s# -a%d >"*#s. &ll of the abo)e.
#racing. ;isalignment problems. $nclusions. &ll of the abo)e.
1A 8 9
@1.
;acroscopic e%amination re/uires any specimen to be inspected !a" !b" !c" !d"
@2.
Which of the following may be classed as a “ ;ore serious defect “ (a) (&) (c) (d)
@-.
&rc de)iation. &rc misalignment. A%c &". &rc eye.
& metallurgical problem most associated with 7ubmerged &rc welding is !a" (&) !c" !d"
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& standard for wormanship only. A s#$ " %0#s "% ,a*0ac$0%i*+ a s'#ciic '%"d0c$. *e)els of acceptability of a weldment. one of the abo)e.
;o)ement of the arc by magnetic forces in ;;& welding is termed !a" !b" !c" !d"
@4.
7lag inclusions. Dusion defects ! $nter run". 40si"* d##c$s ( S0%ac#). orosity.
& code of practice is !a" (&) !c" !d"
@.
>nce after welding. Tic# 9 "*c# "%# a*d "*c# a$#% #$c-i*+ .
Hydrogen cracing in the H&F. S"idiica$i"* c%aci*+ i* $-# #d ,#$a. Hydrogen cracing in the weld metal. *amellar tearing in the weld metal.
1@ 8 9
@9.
>%y pressure and no((le si(e would influence what in flame cutting !a" !b" (c) !d"
@=.
+he main usage of arc cutting 8 gouging processes is in !a" (&) !c" !d"
@A.
+he cutting of single be)el preparation. T-# %#,"a " d#'"si$#d #ds. +he cutting of single < L type preparation. +he cutting 8 gouging of non L ferrous materials only.
Which of the following processes joints metals plastically !a" !b" !c" !d"
@@.
+he temperature re/uired for cut initiation. +he ability to cut 7tainless steel. T-# d#'$- " c0$ "&$ai*a&#. one of the abo)e.
4%ic$i"* #di*+. Gesistance welding. lasma welding. &ll of the abo)e.
Which electrode classification would be rele)ant to &W7 &4.1 L A1 (a) (&) (c) (d)
E 513. 5 41--. 5 =01A L 3. Dleet weld 4
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100. Which of the following coatings associated with “ 7to)e Welding “ (a) (&) (c) (d)
77
Gutile. C#0"sic. Casic. >%idi(ing.
RE4 76 T P ONEILL BOO8 PAGE 6 1 SEC 9 15.3.3.3
20 8 9
101. & common gas 8 mi%ture used in ;$3 welding nicel alloys to combine good le)els of penetration with good arc stability would be (a) (&) (c) (d)
100 : #>2. 155 F A%+"*. A0 : &rgon 20 : #>2. @A : &rgon 2 : >%ygen.
RE4 76 T P ONEILL BOO8 PAGE 6 5! SEC 9 ;.@.;
102. +he type of 7&W flu% is more resistant to moisture absorption (a) 40s#d. (&) &gglomerated. (c) Casic. (d) &ll of abo)e the same resistance.
RE4 76 T P ONEILL BOO8 PAGE 6 1: SEC 9 ;.=.@.;
10-. +he flame temperature of o%y 8 acetylene mi%ture gas is gi)en as (a) 3;55 C (&) 2-00K # (c) 4000K # (d) one of the abo)e.
RE4 76 CWSIP BOO8 PAGE 1!.;
10. & large grain structure in steels said to produce !a" (&) !c" !d"
*ow ductility )alues. L" %ac$0%# $"0+-*#ss a0#s. High fracture toughness )alues. High tensile strength.
104. +he lielihood of brittle fracture in steels will increase with !a" !b" !c" (d)
77
& large grain formation. & reduction of in?ser)ice temperature to sub (ero le)els . Derritic rather than austenitic steels. A " $-# a&"#.
21 8 9
109. Gepair welding is often more difficult than production due to !a" !b" !c" !d"
+he material being ingrained with in?ser)ice contaminates. Gestricted access within the repair area. +he possible position of the weld repair. A* " $-# a&"# .
10=. Hydrogen cracing in the weld metal is liely when welding (a) (&) (c) (d)
#arbon ;anganese steels. 7tainless steels. Mic%" a"#d s$##s (HSLA ". *ow carbon steels.
10A. 5 standard 2AA would refer to which of the following !a" !b" (c) !d"
10@.
Welder appro)al testing. Welding e/uipment. W#di*+ '%"c#d0%# a''%"a #onsumables for 7ubmerged arc welding.
orosity is caused by !a" !b" !c" !d"
5ntrapped slag in the solidifying weld. E*$%a''#d +as i* $-# s"idii*+ #d . 5ntrapped metallic inclusions in the solidifying weld. one of the abo)e.
110. $n a bend test, the face of the specimen is in tension and root is in compression, the type of test being carried out would be !a" !b" (c) !d"
77
& root bend test. & side bend test. A ac# *d $#s$. one of the abo)e.
22 8 9
111.
Lac " sid# a 0si"*. 7urface undercut. $ncompletely filled groo)e. >)erlap.
112. +he process of tempering is often carried out to regain toughness after which of the following processes !a" !b" (c) !d"
&nnealing. ormalising. Ha%d#*i*+. 7tress relie)ing.
11-. +he presence of iron sulphide in the weld metal is most liely to produce which of the following upon contraction of the weld !a" !b" !c" !d"
S"idiica$i"* c%aci*+. Hydrogen cracing. $ntergranular corrosion. 7tress corrosion cracing.
11. When )isually inspecting a completed single M butt cap you would certainly assess !a" !b" !c" (d)
#ap height. +oe blend. Weld width. A B C.
114. 3enerally the most suitable method of detecting lac of side wall fusion would be (a) !b" !c" !d"
77
UT. ;$. G+. +.
2- 8 9
119. Hot shortness is a term used to indicate (a) *amellar tearing. (&) S"idiica$i"* c%aci*+. (c) Hydrogen cracing. (d) one of the abo)e.
RE4 76 CSWIP BOO8 PAGE 9 ;;.:
11=. +he use of cobalt as an isotope would generally be used on !a" !b" !c" !d"
+hin material. +ee joints. late thicness greater than 24mm. one of the abo)e.
11A. $n welding procedure terms, a change in essential )ariable means !a" !b" !c" (d)
Ge?/ualification of the weld procedure. ossible changes in the weldNs micro structure ossible changes in the mechanical properties. A " $-# a&"#.
11@. Weld symbols placed on a dotted line in accordance with $7> re/uirements means (a) (&) (c) (d)
Weld on “ &rrow “ side. W#d "* O$-#% sid#. Weld on site. Dull penetration.
RE4 76 CSWIP BOO8 PAGE 9 :.@
120. & welding inspectorNs main attribute includes !a" Bnowledge and e%perience. !b" *iteracy. !c" Honesty and integrity. (d) A " $-# a&"#. !e"
77
2 8 9
121. +he correct term for a joint prepared on one component only is !a" !b" !c" (d)
& be)el butt. & OEN butt. & OBN butt. A " $-# a&"#.
122. +he correct terminology in the preceding /uestion !=" is
!a" !b" !c" !d"
L L L L
12-. +echnically , a code of practice is !a" (&) !c" !d"
& standard. A S#$ " %0#s "% $-# ,a*0ac$0%# " a '%"d0c$. Gelated to welder and weld procedure appro)al. &ll of the abo)e.
12. +he correct term for “ cap height “ is !a" !b" (c) !d"
Geinforcement. #ap profile height. E2c#ss #d ,#$a. &ll of the abo)e.
124. & tensile test will assess (a) (&) (c) (d)
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$mpact )alues. 7tress. 7train B"$- B C.
RE4 76 CSWIP BOO8 PAGE 9 @.
24 8 9
129. +he important point of high temperature steels is that !a" !b" !c" !d"
+hey can withstand creep failure. +hey may suffer re?heat cracing problems. +hey may suffer loss of toughness. A " $-# a&"# .
12=. &n austenitic stainless steel may suffer (a) (&) (c) (d)
Weld decay. 7ensitisation. 7olidification cracing. A " $-# a&"# .
RE4 76 CSWIP BOO8 PAGE 9 ;;.1 / ;;.11
12A. #arbon e/ui)alent )alues are useful to determine !a" !b" !c" !d"
Weldability aspects. #rac sensiti)ity aspects. +ypical mechanical properties. A " $-# a&"# .
12@. & basic electrode would normally !a" !b" !c" (d)
Ha)e superior mechanical properties. Ge/uire baing before use. ot be used on low carbon steels. B"$- A B.
1-0. When referring to +$3 welding , the shielding gas could be (a) (&) (c) (d)
77
&rgon I Hydrogen. !D>G W5*6$3 &<7+5$+$# 77" &rgon I Helium !+> >C+&$ +H5 ;>65G&+5 55+G&+$>" &rgon I itrogen !D>G W5*6$3 #>5G" A " $-# a&"# . RE4 76 CSWIP BOO8 PAGE 9 11.@
29 8 9
1-1. When referring to ;$3 welding , the shielding gas could be !a" !b" !c" !d"
A%+"*. &rgon I 1 : o%ygen. &rgon I 20 : #>2. one of the abo)e.
RE4 76 CSWIP BOO8 PAGE 9 1@.:
1-2. 7ubmerged arc utili(es !a" !b" !c" !d"
D##' '#*#$%a$i"* c-a%ac$#%is$ic. High deposition rates on 6# I Dlat !&" welding only. RE4 76 CSWIP BOO8 PAGE 9 13.1 one of the abo)e.
1--.
&bility to find most defects. *ower sill re/uirement. &bility to detect lamination. B"$- A C.
1-. +he most serious defect types are !a" !b" !c" (d)
lanar. #racs. *ac of fusion. A " $-# a&"#.
1-4. Which of the following discontinuities could be as a primary processing discontinuity often found in cast material !a" !b" (c) !d"
77
Datigue crac. 7tress corrosion crac. P"%"si$. *ac of penetration.
2= 8 9
1-9. Which of the following discontinuities could be classified as a ser)ice induced discontinuity (a) !b" !c" !d"
4a$i+0# c%ac. orosity. ;achining tear. *ap.
1-=. Which of the following contamination could affect the sensiti)ity of penetrant !a" !b" !c" !d"
&cid. Water. 7alts. A " $-# a&"# .
1-A. Which of the following is a discontinuity that might be found in a forging !a" (&) !c" !d"
7hrinage cracs. La's. #old shuts. $nsufficient penetration.
1-@. +he prime purpose of the blac light for fluorescent penetrant inspection !a" (&) !c" !d"
10.
$n accordance with C7 41-4 which of the following is applicable for scale O # O with regards to hydrogen content per 100g of deposited weld metal (a) (&) (c) (d)
77
+o magnify indications. T" ,a# $-# i*dica$i"*s isi&#. +o de)elop indications. +o speed up inspection.
P 14 ml P 14 ml Q 24 ml P 10 ml Q 14 ml P 4 ml Q 10 ml
( SCALE A ) ( SCALE B ) ( SCALE C ) ( SCALE D J , "
2A 8 9
11. Which is the correct heat input if the amps are -40 , )olts -2 and tra)el speed -10 mm 8 s !a" (&) !c" !d"
2.19 E 8 mm 5.53 K / ,, 2190 E 8 mm -9 E 8 mm
RE4 76 T P ONEILL BOO8 PAGE 6 ;3 SEC 9 .;
12. $n accordance with C7 41-4 what is the minimum distance the pre heat shall be be applied from the joint preparation !a" 100 mm. !b" 24 mm. (c) =4mm. (d) ot specified.
1-. $n accordance with C7 41-4 what is the recommended minimum time allowed for the pre heat temperature to e/uali(e !a" !b" !c" !d"
2 ;in for each 24 mm of parent material thicness. 4 ;in for each 24 mm of parent material thicness. 2 ;in for each 40 mm of parent material thicness. 4 ;in for each 40 mm of parent material thicness.
1. Which of the following best describes the elastic limit
!a" +he resistance to fracture under impact loading. !b" T-# ,a2i,0, s$%#ss $" -ic- a ,a$#%ia ca* s0&<#c$#d i$-"0$ '#%,a*#*$ d#"%,a$i"*. !c" +he amount of stress at which point the material will continue to elongate without an increase in force applied. !d" +he ability of a material to stretch and become permanently deformed without breaing or cracing.
14. $n accordance with C7 2@01 which of the following is classified as triple de?o%idi(ed filler wire !a" !b" !c" !d"
77
& R= wire. & 1A wire. & 14 wire. &ll of the abo)e.
2@ 8 9
19. $n C7 9-@ an electrode classified as 541 RE4 76 T P ONEILL BOO8 /PAGE ; SEC 9 15.3.@ !a" Has an <+7 )alue of 41,000 psi., minimum yield strength of --0 8 mm. !b" Has an <+7 )alue of -0 to 440 8 mm, minimum yield strength of -90 8 mm. !c) Has a* UTS a0# " 15 $" 5 N / ,, ,i*i,0, i#d s$%#*+$- " 35 N / ,,. !d" Has an <+7 )alue of 410 to 940 8 mm, minimum yield strength of --0 8 mm.
1=. &n 5A0 electrode would normally be classified in which standard !a" !b" !c" (d)
C7 5 @@. C7 9-@. &W7 &4.4 AWS A.1
1A. What is an acti)e flu%
!a" & material used to clean surfaces of the joint through continued chemical reaction. !b" & material used to protect the molten weld pool during welding. !c" & material used to aid fusion. !d" &ll of the abo)e.
1@. Which of the following is most liely to reduce the chances of arc blow !a" !b" !c" !d"
& change from ac current to dc current. A c-a*+# %", dc c0%%#*$ $" ac c0%%#*$. & change from dc electrode I)e to dc electrode L)e. & change from dc electrode L)e to dc electrode I)e
140. $f a steel has a #e/ : of 0.A : T P ONEILL BOO8 / PAGE ; SEC 9 .@ !a" WH+ would always be necessary. !b" $t will probably re/uire a pre?heat temperature abo)e -00Kc prior to welding. !c" I$ i '%"&a& %#0i%# a '%#6-#a$ $#,'#%a$0%# a&"# 155c '%i"% $" #di*+. !e" +he heat affected (one will be )ery tough.
77
-0 8 9
141. When welding a double M butt joint with 7&W process the presence of centreline porosity may be due to
!a" !b" !c" !d"
RE4 T P ONEILL BOO8 / PAGE 5 1 6amp flu%. C"*$a,i*a$#d <"i*$ '%#'a%a$i"* . SEC 9 .@ $ncorrect stic out lengths. &ll of the abo)e.
142. When considering the ad)antages of site G+ o)er <+ which of the following applies
!a" & permanent record produced, good for detecting defects which do not ha)e significant depth in relation to a%is of the ?ray beam and defect identification. !b" & permanent record produced, good for detecting all surface and sub?surface defects and assessing the through thicness depths of defects. !c" A '#%,a*#*$ %#c"%d '%"d0c#d d##c$ id#*$iica$i"* *"$ s" %#ia*$ "* "'#%a$"% si. !d" o controlled areas re/uired on site, a permanent record produced and good for assessing the e%tent of pipe wall thicness reductions due to internal corrosion.
14-. When ac only is re/uired for welding, the power supply unit is almost always !a" !b" !c" !d"
& transformer, rectifier and a means to change the current. A $%a*s"%,#% i*#%$#% a*d a ,#a*s $" c-a*+# $-# c0%%#*$. & rectifier, alternator and a means to change the current. & transformer or alternator and a means to change the current.
14. +he H&F associated with a fusion weld on steel has up to how many separate regions of micro structure (a) (&) (c) (d)
@. 9. 1. 2.
RE4 T P ONEILL BOO8 / PAGE ;@ SEC6 .;
144. +he possible effects of ha)ing a tra)el speed too fast RE4 T P ONEILL BOO8 / PAGE ;@ / SEC6 E6@ !a" L" $"0+-*#ss sa+ i*c0si"*s a*d 0*d#%c0$. !b" High hardness, slag inclusions and a narrow thin weld bead. !c" High hardness, e%cessi)e deposition and cold laps.
77
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!d" *ow toughness, poor fusion and slag inclusions. 149. What fi)e parameters would be checed when calibrating welding e/uipment for mechani(ed ;&3 welding !a" !b" (c) !d"
Eoint set up, flu% coating , polarity, tra)el speed and amps 8 )olts. &mps 8 )olts, WD7, gas flow rate, polarity and tra)el speed. A,'s / "$s W4S i%# dia,#$#% '"a%i$ a*d $%a# s'##d. 5lectrode stic out, WD7, amps 8 )olts, polarity and wire diameter.
14=. Which of the following statements is true when using a flat characteristic power source !a" !b" (c) !d"
+he electrode is always dc L)e. +he shielding is always pure argon. T-# i%# ##d s'##d %#,ai*s c"*s$a*$. +he electrode e%tension will ha)e no effect on weld /uality.
14A. Which of the following will )ary the most , when )arying the arc length !a" !b" !c" !d"
"$a+#. &mperage. olarity. one of the abo)e.
14@. Which of the following statement is true !a" +he core wire in a ;;& electrode has a higher melting point than the flu% !b" 5lectrode dc I)e is used when welding with the ;$3 8 ;&3 welding process. !c" +he H&F of a carbon manganese steel weld usually has a lower ultimate tensile strength than the weld. (d) A " $-# a&"# a%# $%0#.
190. & multi run ;;& butt weld made on #8;n steel consists of 4 passes using 9mm electrodes. & 12 pass weld made on the same joint using mm electrodes on the same material will !a" Ha# a "#% -#a$ i*'0$ a*d a -i+-#% d#+%## " +%ai* %#i*#,#*$. !b" Ha)e a lower heat input and a coarser grain structure. !c" Ha)e a lower amount of distortion and a higher degree of grain refinement.
77
-2 8 9
!d" Ha)e a higher amount of distortion and a lower degree of grain refinement 191. +he main reason for using a bac purge when welding 1A?A stainless steel with the +$3 welding process is to !a" !b" !c" !d"
#ontrol the root penetration. re)ent root bead porosity. $mpro)e positional welding. re)ent the formation of a dense o%ide layer on the root.
192. & typical minimum preheat temperature for an ;;& weld made on steel with a carbon content of 0.2- : and manganese content of 1.- : (a) (&) (c) (d)
reheat would not normally be re/uired. RE4 T P ONEILL BOO8 / PAGE ; *ess than 40Kc. A ,i*i,0, " 155c. SEC6 .@ &bo)e 2A0Kc.
19-. Which is often the hardest part of a multi run weld made using ;;& !a" +he H&F of the root. !b" +he H&F of the cap. !c" +he root. (d) T-# ca'.
19. +he H&F of a fusion weld (a) (&) (c) (d) (#)
194. Which of the following welding processes would you e%pect to use a collet !a" !b" !c" !d"
77
TIG / TAG. ;$3 8 ;&3P ;;&. &ll of the abo)e.
-- 8 9
199. Which of the following may be used for the +$3 8 +&3 welding of austenitic stainless steel (a) (&) (c) (d)
*athanum electrode dc L)e. #erium electrode dc L)e. Firconium electrode ac. +horium electrode dc I)e.
RE4 T P ONEILL BOO8 / PAGE 1; SEC6 ;..;
19=. Which of the following standards is entitled electrode wire and flu%es for submerged arc welding process of carbon steel and medium tensile steel (a) (&) (c) (d)
C7 9-@. C7 2@01. C7 29--. BS @1.
RE4 T P ONEILL BOO8 / PAGE @!
19A. Which of the following processes use a constant characteristic !a" !b" !c" !d"
7ub?arc Q 1000 amps, ;;&, 5lectro slag. +$3 8 +&3, 7ub?arc P 1000 amps, 5lectro slag. 7ub?arc Q 1000 amps, ;$3 8 ;&3, 5lectro slag. ;$3 8 ;&3, 7ub?arc P 1000 amps, 5lectro 7lag.
19@. What are the possible results of ha)ing a too lower heat input !a" &n increase in hardness, lower yield strength and lac of fusion. !b" & reduction in toughness, hydrogen entrapment and an increase in hardness. !c" 5ntrapped hydrogen, an increase in hardness and lac of fusion. !d" 5ntrapped hydrogen, a reduction in carbon content and lac of fusion.
1=0. What ind of steel is used for maing filler rod !a" Billed steel (&) Ri,,i*+ s$##. !c" #arbon steel.
77
- 8 9
1=1. Which of the following is not related to weld
!a"
!b"
(c )
1=2. Which of the following 6+ method is not suitable to detect sub surface defect !a" !b" !c" !d"
<+. PT. G+. ;$.
1=-. 7&W in single pass weld will gi)e !a" !b" !c" !d"
oor profile. Curn rapidly. 3ood penetration. one of the abo)e.
1=. $n 7&W process if )oltage and current is increased and tra)el speed is decreased, What will be the effect in the profile !a" Wider weld. !b" Higher weld reinforcement. !c" #onca)e weld surface.
1=4. What change will occur on the H&F during heating of metal caused by welding !a" #hange in tensile strength. !b" #hange in hardness. (c) C-a*+# i* +%ai* c%s$a s$%0c$0%#.
77
-4 8 9
1=9. What types of electrodes needs e%tra treatment !a" Basic. !b" Gutile. !c" #ellolosic.
1==. &pplying preheat when welding, carbon manganese steel is normally done to a)oid !a" (&) !c" !d"
7lag inclusions. Hd%"+#* c%aci*+. *ac of side wall fusion. orosity.
RE4 76 T P ONEILL BOO8 PAGE ; SEC 9 ..;
1=A. Which of the following mechanical properties of a weld in carbon manganese steel is most affected if the heat per unit length of weld is e%cessi)ely high !a" !b" !c" (d)
5longation. +ensile strength. Hardness. T"0+-*#ss.
1=@. 'ou obser)e centerline cracing in a weld that has been made at one of fi)e wor station each maing similar components. +he first action to tae is !a" !b" (c) !d"
$mpound all welding consumables. Geport the occurrence to a higher authority. S$"' a #di*+. #all for full 6+ checs.
1A0. Which of the following defects is unliely to be found by )isual inspection !a" !b" !c" !d"
77
*inear misalignment. )erlap. *inear slag inclusions.
-9 8 9
1A1. Which of the following welding processes uses a resisti)e heating system to achie)e weld metal deposition (a) (&) (c) (d)
;;&. 7&W. E#c$%" sa+ #di*+. Gesistance spot welding.
RE4 76 T P ONEILL BOO8 PAGE 9 ;5 / SEC6 ;.:.;
1A2. What two functions in arc welding must be in e/uilibrium to enable a stable arc to be established !a) !b" !c" !d"
A%c "$a+# . #urrent. Wire 8 5lectrode feed rate. ;etal burn off rate.
1A-. $n ;;& welding, what parameter is used to control the penetration into the base material. !a" !b" !c" (d)
Moltage. Welding speed. $ron powder in the coasting. C0%%#*$.
1A. $n the welding of a butt joint made from one side, which of the following controls the profile of the root bead !a" !b" !c" !d"
Goot face. Ce)el angle. Goot gap. one of the abo)e.
1A4. What type of power source characteristic is re/uired for manual welding !a" !b" (c) !d"
77
#onstant )oltage. Dlat characteristic. D%""'i*+ C-a%ac$#%is$ic. ;otor generator.
-= 8 9
1A9. Which of the following destructi)e test would indicate the toughness of weld metal and parent metal L H&F !a" !b" !c" (d)
;acro. ic brea. Hardness. C-a%' ## *"$c-.
1A=. 6egreasing components are essential for /uality welding but some agents may !a" !b" !c" !d"
#ause corrosion problems. 3i)e off phosgene gas. *ea)e residues. &ll of the abo)e.
1AA. Which of the following chemical elements has the greater effect on the hardenability of a steel plate !a" !b" !c" (d)
;olybdenum. #hromium. +itanium. Ca%&"*.
1A@. $n ;$3 #>2 welding which parameters gi)e the greatest control of weld appearance during dip transfer or short circuiting welding !a" !b" !c" (d)
Wire stic out length. &mperage. Wire feed speed. I*d0c$a*c#.
1@0. $n ;;& welding, the slag produced can be )aried to suit the welding position. Which type of slag would be re/uired for welding in the HM position !a" (&) !c" !d"
77
Dluid. isc"0s. one of the abo)e. 7emi fluid.
-A 8 9
1@1. +he weld metal deposit of ;;& electrodes, achie)es its mechanical strength through !a" +he core wire. !b" +he flu% coating. !c" $ron powders with the flu% coating.
1@2. What constituent is needed in a coating of an electrode to pre)ent the formation of porosity in welding of a rimming steel !a" !b" (c) !d"
$ron powders. #alcium fluoride. Siic"*. #alcium carbonate.
1@-. Welds made with high heat inputs show a reduction in one of the following properties !a" (&) !c" !d"
6uctility. T"0+-*#ss. Datigue strength. ;echanical strength.
1@. $n ?ray the /uality of radiographic negati)e is assessed by the !a" (&) !c" !d"
6ensity of the film. IQI I*dica$"%. BM& a)ailable. 7tand L off distance.
1@4. & steel described as J+ will ha)e impro)ed tensile properties because it has !a" (&) !c" !d"
77
Had control of chemical composition. B##* -#a$ $%#a$#d. Ceen /uality tested. Ceen )acuum melted.
-@ 8 9
1@9. Which one of the following type of steels would gi)e rise to the formation of porosity when autogenously welded with an arc process !a" !b" (c) !d"
Dully illed steel. 7emi illed steel. Ri,,i*+ s$##. Dine grained steel.
1@=. $n 7&W, the use of e%cessi)ely high )oltage would result in !a" (&) !c" !d"
$nsufficient flu% melting. E2c#ssi# 02 ,#$i*+. 7lag remo)al difficulties. 7patter.
1@A. +he use of cellulosic electrodes is often made when welding the root pass of pipes in the field. +his is because (a) (&) (c) (d)
H2 control is needed. RE4 7 TP.ONEILL / PAGE 1 / SEC 15.3.3.3 $ron powders in the electrode. Hi+-#% a%c "$a+# ca* "&$ai*#d. 7horter arc length can be achie)ed.
1@@. $n the welding of austenitic stainless steels, the electrode and the plate material can be purchased with low carbon contents. +he reason for this is to pre)ent (a) (&) (c) (d)
#racing in the H&F. T-# "%,a$i"* " c-%",i0, ca%&id#s. #racing in the weld metal. RE4 7 CSWIP BOO8 / PAGE ;;.1@ 6istortion.
200. 7ubmerged arc flu%es can be supplied in two form. +hese are !a" !b" !c" (d)
77
7intered and agitated. &gitated and fused. #rushed and agglomerated. 40s#d a*d a++",#%a$#d.
0 8 9
201. $n a steel which has impro)ed creep properties at ele)ated temperature, which one of the following elements helps in this impro)ement !a" !b" (c) !d"
+ungsten. ;anganese. M"&d#*0,. #arbon.
202. Welding a steel plate of a #5 of 0.4, would re/uire preheating to !a" (&) !c" !d"
re)ent the formation of sulphides. P%##*$ -a%d#*i*+ i* $-# HA?. re)ent the formation of carbides. +o impro)e mechanical properties in the weld.
20-. Which on of the following processes uses the 8# -"i*+ system of fusion (a) (&) (c) (d)
Driction welding. 6iffusion welding. E#c$%"* a, #di*+. &utogenous +$3 welding.
RE4 76 CSWIP BOO8 / PAGE !.11.
20. $n friction welding, is the metal at the interface in the !a" !b" (c) !d"
*i/uid state. 7olid state. Pas$ic s$a$#. 5lastic state.
204. Welding procedures may re/uire welds to be deposited at a controlled rate heat input. High heat input would !a" (&) !c" !d"
77
Ha)e poor profile. Ha# a%+#% +%ai* si>#. Ha)e high hardness in the H&F. Ha)e low elongation properties.
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204. C7 @@ part $$ communicates by the use of symbols the type of joint preparation to be used. *isted below are four symbols. which of these indicates the depth of penetration of the weld re/uired on the joint
!a"
(&)
10 10
!c"
10 10
!d"
4
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20=. $n accordance with C7 @@ what is the weld junction !a" !b" (c) !d"
+he area containing H&F and weld metal. +he weld metal and parent metal. T-# &"0*da% $##* $-# 0si"* >"*# a*d HA?. +he part of the weld , which undergoes metallurgical change due to heat Drom welding.
20A. Which of the following are essential factors for lamellar tearing !a" Hi+- %#sid0a s$%#ss#s '""% $-%"0+- $-ic*#ss d0c$ii$ #2is$i*+ 'a$# La,i*a$i"*s. !b" oor through thicness ductility, fusion face parallel with rolled direction >f parent plate, most commonly occurs in but welds. !c" 7tress, poor through thicness ductility, fusion face parallel with rolled 6irection of parent material. !d" +ensile stress, deo%idi(ed parent plate, poor through thicness ductility.
20@. $n gas welding , leftward welding is described in C7 @@ as !a" +he flame is described towards the welded part and filler material is 6irected toward un?welded part of the joint. !b" +he flame and filler material both directed towards welded part of the joint. !d" +he flame is directed towards the un welded part and filler material is $s directed towards welded part of the joint. (#) T-# a,# a*d i#% ,a$#%ia is &"$- di%#c$#d $"a%ds 0* #d#d Pa%$ " $-# <"i*$. RE4 76 T P ONEILL BOO8 PAGE 6 SEC 9 ;.;.;
210. Which of the following is not a fusion welding process !a" !b" !c" (d)
77
+hermit welding. 5lectro slag welding. *aser welding. 4%ic$i"* #di*+.
- 8 9
211. When considering the heat treatment process of tempering
!a" T-is is ac-i##d & s" -#a$i*+ $-# ,a$#%ia $" a $#,'#%a$0%# $##* ;55c $" 5c a*d s" c""i*+ i* ai%. !b" +his is achie)ed by heating the material to around 200Kc and soaing for appro%imately 10 L 12 hrs and cooling down in air. !c" Mery fast cooling from the austenite region. !d" &ll of the abo)e could gi)e a temper.
212. Which of the following are essential )ariables for WH+ !a" !b" !c" !d"
Heating rate. +emperature attained. #ooling rate. &ll of the abo)e.
21-. ;ost metals e%pand when heated, the change in length is e%pressed as !a" !b" !c" !d"
+hermal conducti)ity. ;odulus of elasticity. #oefficient. 'ielding.
21. $n +$3 welding the no((le is usually made !a" !b" !c" !d"
copper. &luminum. #eramic. #opper 8 Finc.
214. Which of the following is the odd out !a" !b" !c" (d)
77
eon. enon. &rgon. Ni$%"+#*.
8 9
219. +he welding arc could be characteri(ed as !a" A -i+- c0%%#*$ " "$a+# a%c i$- a " " ##c$%"*s %", ca$-"d# T" A*"d#. !b" & low current, high )oltage arc with a flow of electrons flowing from &node. !c" & medium current and medium )oltage with a flow of electrons and I)e $ons flowing from anode to cathode. !d" & )oltage which always remains constant at a constant potential with a Dlow of electrons and L)e ions from cathode to anode.
21=. Which of the following are considered to be H&F cracs !a" !b" !c" (d)
7olidification cracs, lamellar tearing and reheat cracs. Geheat cracs, li/uation cracs and solidification cracs. H2 cracs, solidification cracs and li/uation cracs. R#-#a$ c%acs i0a$i"* c%acs a*d H; c%acs.
21A. Which of the following standards entitled Misual inspection of fusion welded joints !a" (&) !c" !d"
C7 414. BS ;:!. C7 41-4. C7 5 0.
21@. $n general it is not easy to mechanise the ;;& welding process because !a" 7hort electrode length, the control of the arc length and the process uses & flat characteristic. !b" 7hort electrode length, the control of the arc length and flu% co)erings. !c" +he control of the arc length, stop start problems and short electrode length, !d" Dlu% co)erings, short electrode lengths and relationship between amps &nd )olts. 220. Which of the following statements is true !a" >%ygen?fuel gas cutting is essentially an o%idi(ation thermal cutting rocess. !b" >%ygen?fuel gas cutting is essentially a melting process. !c" +he only fuel gas used is acetylene. !d" ropane is the preferred fuel gas in o%ygen?fuel gas cutting as it produces Hotter flame.
77
4 8 9
221. Which of the following best describes a semi automatic welding process !a" +he welder is responsible for the arc gap and tra)el speed. !b" +he welder is responsible for the tra)el speed only. !c" +he welding plant controls both tra)el speed and arc gap but under #onstant super)ision. !d" +he welding plant controls both tra)el speed and arc gap, no 7uper)ision re/uired.
222. Which sub atomic particle has a I)e charge !a" !b" !c" !d"
A P%"$"*. & hoton. &n 5lectron. & eutron.
22-. Which material is the most susceptible to reheat cracing !a" !b" !c" !d"
High carbon steel. Billed steel. #reep resistant steels. &ustenitic steels.
22. +hree essential factors for producing fusion weld are melting, remo)al of surface o%ide from the joint surfaces and elimination of atmosphere from the region of the arc. ame the fourth one !a" !b" !c" !d"
+he weld must be free from stress. +he filler material must match that of the weld. +he completed joint must at lease match the mechanical properties. &n arc for a heat surface.
224. Which arc welding process techni/ue is liely to be used to repair localised porosity in a weld !a" !b" !c" !d" !e"
77
;;& L 3 position. ;echanised arc welding. 7ub &rc. &ll of the abo)e. one of the abo)e.
9 8 9
229. & welder /ualified in the 3 position would normally be /ualified for welding !a" !b" !c" !d"
&ll diameters of pipe. Welding positions &,3, and D. $n position 3 only. &ll pipe wall thicness.
22=. ame the fourth weld process crac which has a totally different formation mechanism to H$## !H2 induced cold crac",solidification cracing and lamellar tearing !a" !b" !c" !d"
*i/uation cracing. Geheat cracing. #rater cracing. Hot tearing.
22A. lanar defect are best described as (a) (&) (c) (d)
Li*#a% %", a$ #as$ "*# di%#c$i"*. RE476 TP ONEILL /PAGE 3 / SEC 11.3 Gounded indications. *inear from at least one direction with )olume. ;ay be classed as all of the abo)e.
22@. Which of the following welding processes is not classed as an arc welding process (a) (&) (c) (d) (#)
5lectro slag welding. +hermit welding lasma welding. B"$- A a*d B. &ll of the abo)e.
RE4 7 CAWIP BOO8 / PAGE !.1;
2-0. which of the following materials has the poorest weldability !a" (&) !c" !d"
77
&ustenitic stainless steel. Ma%$#*si$ic s$ai*#ss s$##. #arbon manganese steel. H7*& steel.
= 8 9
2-1. Which of the following in a fusion weld usually has the highest tensile strength !a" !b" !c" !d"
Weld metal. arent material. H&F. Dusion (one.
2-2. Which of the following is a alternati)e name for a crater crac !a" !b" (c) !d"
#old crac. +earing. S$a% c%ac. Datigue crac.
2--. What action must the welding inspector re/uest if a lamination is found e%tending into the be)el face !a" #ut bac the material until a lamination free area is found. !b" &ccept the be)el unless the lamination e%ceeds 4mm. !c" lace a sealing run o)er the lamination and dress flush, then mae the weld as normal. !d" &ction to tae will depend on the agreed specification !or welding engineer 8 client if specification does not state the action ".
2-. +he de)iation of the arc during arc welding due to e%ternal magnetic influences is is nown as !a" !b" !c" !d"
&rc strie. &rc blow. aramagnetic interference. 6iamagnetic interference.
2-4. +he weldability of a material may be affected by !a" !b" !c" !d"
77
+emperature of the component. +he #e/ : of the material. +he elements in the material. &ll of the abo)e.
A 8 9
2-9. Which of the following heat treatment processes would be used for grain refinement !a" (&) !c" !d"
&nnealing. N"%,aisi*+. Juenching. H2 release.
2-=. & repair has been made using ;;& on a double M butt weld on a 10 m diameter tan. +he defect repaired was lac of inter?penetration and it had been e%ca)ated with a disc grinder prior to repair. &fter repair it was determined that the wrong electrodes had been used. What action should the inspector tae !a" !b" !c" !d"
Ha)e the repair area ground and re?repair. &ccept the wor if the electrodes were the same flu% type. Heat treat the area. #onsult the senior inspector or welding engineer if the specification or rocedure does not co)er the course of action.
2-A. Which one of the following statements is false !a" 7urface breaing defects are usually more detrimental to a weld in #omparison with sub?surface defects. !b" +he H&FNs of a steel weld usually ha)e a higher tensile strength than +he weld metal. !c" *ameller tearing may occur within the fusion (one of large fillet welds. !d" WH+ may stress relie)e. 2-@. What is the possible cause of too mush restraint of the parent material during welding !a" Gestraint is always desirable. !b" $t may lead to cracing, especially with small welds between large components. !c" $t will cause too much distortion. !d" $t will cause lamellar tearing if it is present on a corner joint. 20. Dluctuating loads ie cyclic stresses bellow the u.t.s. on a weld component may lead to !a" !b" (c) !d"
77
+ensile failure. 'ield failure. 4a$i+0# ai0%#. 7hear failure.
@ 8 9
21. Which of the following is a method to accurately measure the root radius of a charpy or i(od specimen !a" !b" !c" !d"
Us# a ,ac-i*# ca#d a s-ad"+%a'-.
22. Which of the following statements is true !a" Dillet welds are preferable to butt welds due to high strength. (&) 4i#$ #ds a%# *"%,a diic0$ $" ass#ss i$- NDT i* c",'a%is"* Wi$- &0$$ #ds. !c" Dillet welds are only made on steels. !d" &ll of the abo)e are true.
2-. Which of the following is not an inert gas at welding temperature !a" !b" (c) !d"
&rgon. eon. Ca%&"* di"2id#. Helium.
2. Which arc welding process uses a non consumable electrode !a" (&) !c" !d"
;$3. TIG. 7&W. one of the abo)e.
24. Which of the following welding processes is not a fusion welding process !a" !b" !c" !d"
77
E#c$%" sa+ #di*+. >%y?gas welding. Dorge welding. +$3 welding.
40 8 9
29. Which of the following current types would be used for welding aluminum with the +$3 welding process !a" !b" !c" !d"
Ac. 6c I)e electrode. 6c L)e electrode. &ll of the abo)e could be used successfully.
2=. Which of the following statements is true !a" !b" !c" !d"
5lectrode dc I)e always produces a narrow deep weld pool. +he word Gutile means calcium carbonate. orosity is always repairable. 6c electrode I)e is used for the ;&3 welding of steel.
2A. What four criteria are necessary to produce H$## !a" Hydrogen, moisture, martensite and heat. !b" Hydrogen, poor weld profile, temperature abo)e 200Kc and slow cooling. (c) A +%ai* s$%0c$0%# s0sc#'$i&# $" c%aci*+ s$%#ss -d%"+#* a*d a T#,'#%a$0%# " ;55c. !d" Weld defects, pearlite, hydrogen and a temperature abo)e the melting oint for the material.
2@. How many temperature indicating crayons would be re/uired to ensure the preheat temperature was lying with in a specified range !a" (&) !c" !d"
1. ;. & many as possible.
240. & carbon e/ui)alent of 0.A : !a" Is -i+- "% a C6M* s$## a*d ,a %#0i%# a '%#-#a$ $#,'#%a$0%# "#% 155c. !b" $s insignificant for a #?;n steel and preheat will not be re/uired. !c" $s calculated from the heat input formula. !d" $s not a consideration for determining preheat temperature. RE4 7 TP ONELL / PAGE ; / SEC .@
77
41 8 9
241. & martensite grain structure !a" !b" !c" !d"
$s always present in welds on steel. $s brittle grain structure . $s obtained when the preheat temperature e%ceeds 200Kc. &ll of the abo)e.
242. Which of the following is not a type of crac (a) (&) (c) (d)
Dissure. *amellar tear. 4is- ##. Geheat crac.
RE47 TP ONEILL / PAGE ;@ /SEC 11.;.1 .3
24-. What do you understand by the term minimum interpass temperature !a" !b" !c" (d)
;inimum post heat temperature. ;inimum stress relief temperature. +he lowest temperature to be used when normalising. T-# "#s$ $#,'#%a$0%# a"#d d0%i*+ #di*+ a*d $##* 'ass#s.
24. Which of following welding processes may be described as a low H2 process in comparison with ;;& welding !a" !b" !c" (d)
+$3. ;$3. ;&3. A " $-# a&"#.
244. Which of the following standards is entitled imperfections in ;etallic fusion welds With e%planation !a" !b" !c" !d"
77
C7 5 24A1=. C7 5 29420. C7 5 2244-. C7 5 2194.
42 8 9
249. Which of the following could cause root conca)ity !a" !b" !c" !d"
E2c#ssi# &ac '0%+# '%#ss0%# a*d #% -i+- -#a$ i*'0$ . 5%cessi)e bac purge pressure and entrapped gas. 5%cessi)e root grinding and a slow tra)el speed. 5%cessi)e root grinding and e%cessi)e bac pressure.
24=. High hosphorous contents in carbon steels may cause !a" !b" (c) !d"
#old shortness. Hot shortness. A* i*c%#as# i* d0c$ii$. &n increase in malleability.
24A. $f arc stries are found on carbon steel ! # e/ of .4: ", what undesirable grain structure may be present !a" !b" !c" !d"
erlite. ;artensite. Cainite. &ll of the abo)e are undesirable grain structures in constructional steels.
24@. How do you con)ert psi to 8mm2 !a" !b" !c" !d"
6i)ide by 1.@. ;ultify by 24.. 6i)ide by 1.=. ;ultify by 1.=.
290. How many ;pa are e/ual to 1 8mm2 !a" !b" !c" !d"
77
1.@. 24.. 1.=. 1.
4- 8 9
291. What is the <+7 of a material !a" !b" !c" !d"
+he proof stress. +he ma%imum load a specimen can withstand. +he limit of proportionality. +he point of plastic deformation.
292. What is a charpy test used for !a" !b" (c) !d"
+o measure the ductility of a material. +o test the tensile strength of a material. T" $#s$ $-# *"$c- $"0+-*#ss " a ,a$#%ia. +o measure crac propagation speed.
29-. What is a Micers yramidal $ndentor used for !a" !b" (c) !d"
+o measure indentation toughness. +o measure ductility. T" ,#as0%# -a%d*#ss. &ll of the abo)e.
29. What is the main constituent of a rutitle electrode flu% !a" (&) !c" !d"
#ellulosic. Ti$a*i0, di"2id#. #alcium carbonate. &sbestos.
294. What does the =0 represent on a 5 =010 &W7 classified electrode !a" !b" (c) !d"
77
=0 8mm2 minimum uts. =0 8mm2 ;inimum impact strength. =5555 'si ,i*i,0, 0$s. =0,000 psi minimum impact strength.
4 8 9
299. Casic coated electrodes pro)ided in standard pacaging !a" !b" !c" !d"
&re deep penetrating electrodes. 7hould be heated prior to welding to obtain a low H2 content in the weld. 7hould be heated to totally eliminate H2 in the weld. 7hould not be preheated as this will detrimentally effect welding performance.
29=. 7odium silicate in an ;;& electrode flu% !a" !b" !c" !d"
7tabili(es the arc. Cinds the ingredients of the flu%. Dorms slag. &ll of the abo)e.
29A. Which electrodes are )ery susceptible to causing porosity in the deposited welds if long arc employed !a" !b" !c" !d"
Casic. #ellulosic. Gutitle. one of the abo)e.
29@. What is the purpose of a rectifier !a" !b" (c) !d"
+o adjust the )oltage. +o adjust the amperage. T" c"#%$ ac $" dc. +o reduce the chance of arc strie.
2=0. & welding process using e/uipment with a flat characteristic
!a" Will re/uire a permanent or temporary bacing to be pre placed on the Goot side of the welds. !b" Has the ad)antage of being able to use any type or si(e of electrode. !c" $s liely to be using an electrode less than 2 mm dia. !d" $s liely to be using an electrode more than 2 mm dia.
77
44 8 9
2=1. Which of the following best describes the duty of a welding inspector !a" +o carryout inspection and 6+ in order to find all weld flaws present . (&) T" a$$#,'$ $" #*s0%# $-a$ a #di*+ a*d a* ass"cia$#d ac$i"*s a%# ca%%i#d "0$ i* acc"%da*c# i$- a+%##d s'#ciica$i"*. !c" +o carryout welding inspection and radiography interpretation with agreed procedure for the wor being undertaen. !d" +o mae sure that all the welds are defect free.
2=2. Which of the following butt weld preparation is usually the most susceptible to lac of side wall fusion during ;;& welding !a" !b" !c" !d"
& double sided < preparation. & single M preparation. & double sided M preparation. $t is not possible to induce lac of side wall fusion during ;;& welding .
2=-. What is the leg length of a fillet weld (a) (&) (c) (d)
+he distance from the toe to the face. RE4 7CSWIP BOO8/PAGE ;.13 +he distance from the root to the face center. T-# dis$a*c# %", $-# %""$ $" $-# $"#. +he distance from the toe to the toe.
2=. What is the throat thicness of a mitre fillet weld e/ual leg length !a" (&) !c" !d"
+he distance from the toe to the face. T-# dis$a*c# %", $-# %""$ $" $-# ac# c#*$#%. +he distance from the root to the toe. +he distance from the toe to the toe.
2=4. Which of the following will )ary the most when )arying the arc length using the ;;& process !a" !b" !c" !d"
77
"$a+#. &mperage. olarity. one of the abo)e.
49 8 9
2=9. What is a possible result if the amperage is too low during the welding of a root bead using an arc welding process with a consumable electrode !a" !b" !c" (d)
$ncomplete root penetration. *ac of root fusion. +he free(ing of the electrode to the wor piece. A " $-# a&"#.
2==. Why ha)e a high >#M with ;;& welding !a" !b" !c" !d"
T" i*i$ia$#. +o obtain penetration. +o a)oid lac of fusion. ;;& welding does not ha)e a high >#M.
2=A. What is another term for suc bac !a" !b" !c" !d"
C"*ca# %""$. 5longated porosity in the root. *ac of penetration. & slag line abo)e the root pass.
2=@. & center line crac in a fillet weld !a" !b" !c" !d"
;ay be repaired if the welding engineer for the client says so. ;ay be related to a poor setup. ;ay be related to the way the grains solidify. &ll of the abo)e.
2A0. What is lamellar tearing !a" 7train cracing at the edge of bend test specimen. (&) A $'# " c%ac "cc0%%i*+ i* $-# 'a%#*$ ,a$#%ia is ass"cia$#d i$P""% $-%"0+- $-ic*#ss d0c$ii$ #s'#cia -#* a%+# i#$ #ds O% $## &0$$ <"i*$s a%# ,ad# "* $-# ,a$#%ia. !c" & type of crac found in welds which ha)e undergone se)eral thermal #ycles either during welding or WH+. !d" $t is another name for a plate lamination caused during plate or pipe ;anufacture.
77
4= 8 9
2A1. What is a crater pipe !a" !b" !c" (d)
¬her term for conca)e root. ¬her term for a burn through. & type of gas pore found in the weld crater. A s-%i*a+# d##c$ -ic- ,a "0*d i* a #d c#*$#%.
2A2. Why is a weld procedure /ualification test necessary !a" +o ensure the welder is able to mae sound welds meeting the Ge/uirements of the agreed welding procedure. !b" +o ensure the welder satisfies the 6+ and mechanical re/uirements >f the specification. (c) T" +i# ,a2i,0, c"*id#*c# $-a$ $-# a%ia&#s 0s#d "% #di*+ a%# C",'a$i&# a*d i '%"d0c# s"0*d #ds ,##$i*+ $-# %#0i%#,#*$s O $-# a+%##d s'#ciica$i"*. !d" +o gi)e a guarantee that defect free welds are going to be produced.
2A-. Which of the following is not specified on a typical written welding procedure !a" +o mae sure the welder can weld. !b" +o mae sure the weld is able to withstand stress. (c) T" +i# ,a2i,0, c"*id#*c# $-a$ $-# #d#% ca* '%"d0c# #ds $" M##$ $-# %#0i%#,#*$s " $-# s'#ciica$i"*(s). !d" +o mae sure the welder can produce a weld free from discontinuities.
2A. & welder /ualified in the 93 position would normally be /ualified for welding !a" !b" (c) !d"
&ll diameter pipes. &ll metals. I* a '"si$i"*s "% $-# &0$$ #ds a*d i#$ #ds. &ll of the abo)e.
2A4. on?planar defects associated with a weld !a" !b" (c) !d"
77
&re not significant. ;ust be remo)ed. A%# *"$ 0s0a as si+*iica*$ as 'a*a% d##c$s. >nly e%it sub?surface.
4A 8 9
2A9. *amellar tearing !a" !b" !c" !d"
>nly occurs in the rolled direction of a parent material. $s a H&F type of type of crac. $s another term for a lamination. &ll of the abo)e.
2A=. #old lapping is another term for !a" !b" !c" !d"
Lac " 0si"* a$ $-# $"# " a #d. *ow amperage.
2AA. Which of the following sentences applies to the use of basic ;;& electrodes !a" !b" (c) !d"
+hey are used to deposit weld metal in the )ertical position only. +hey are used where deep penetration is a primary re/uirements. T-# a%# 0s0a 0s#d $" d#'"si$ #d ,#$a " " -d%"+#* c"*$#*$. Casic electrodes are chosen when ease of use is of importance.
2A@. Which of the following would show as light indications on a radiograph !a" (&) !c" !d"
7lag inclusions and copper inclusions. T0*+s$#* i*c0si"*s a*d #2c#ssi# '#*#$%a$i"*. #ap undercut and root piping. 5%cessi)e cap height and incomplete penetration.
2@0. Which of the following welding processes does not uses a consumable electrode !a" !b" (c) !d"
77
7&W. ;;&. TIG. 57W.
4@ 8 9
2@1. +he hardest grain structure capable of being produced when welding #8;n steel is !a" !b" !c" (d)
Cainite. &ustenite. earlite. Ma%$#*si$#.
2@2. +he presence of too much hydrogen when welding #8;n steels would be to cause the formation of !a" !b" (c) !d"
orosity. *ac of fusion. C%ac.
2@-. What term applies if a carbon steel weldment is heated up to a temperature which creates austenitic grain growth and then is allowed to cool in air !a" !b" !c" !d"
N"%,aisi*+. &nnealing. Juenching. +empering.
2@. Why is stress relief !WH+" some times carried out on weldments !a" !b" !c" !d"
T" diss"# #*$%a''#d -d%"+#*. +o remo)e residual stresses. +o fuse plannar defects. &ll of the abo)e.
2@4. When welding a double M butt with the 7&W process the presence of center line porosity may be due to !a" !b" !c" !d"
77
6amp flu%. $ncomplete penetration. #ontaminated weld preparation. &tmospheric contamination.
90 8 9
2@9.
WH$#H >D +H5 D>**>W$3 $7 >+ 3>>6 G+$#5 WH5 55+G&+ +57+$3 !a" !b" !c" (d)
&pplying emulsifier by dipping in emulsifier. &pplying de)eloper by spraying the part with de)eloper. Gemo)al of water L washable penetrant with a water spary. A''i*+ #,0sii#% i$- a &%0s-.
2@=. Which of the following is discontinuity which might be found in sand casting !a" !b" !c" !d"
$ncomplete penetration.
2@A. 7hrinage cracs are usually found in what areas of casting !a" !b" (c) !d"
+hin sections only. Hea)y sections only. A&%0'$ c-a*+#s i* $-ic*#ss. o longer a problem.
2@@. & continuous linear indication can be caused by which of the following discontinuities !a" !b" !c" (d)
orosity. 7lag inclusions. itting. C%acs.
-00. Which of the following is most apt to render the post?emulsification test ineffecti)e !a" !b" !c" !d"
77
+oo long of a penetrant time. +oo long of a de)eloping time. +oo long of an emulsifying time. one of the abo)e.
91 8 9
-01. $n accordance with C7 @@ part 2 which of the following elementary symbols is representati)e of seam welds
!a"
RE4 7 T.P.ONEILL / PAGE : / TABLE 1
Cacing or 7ealing Gun !b" lug Weld
!c" 7pot Weld (d)
SEAM WELD
-02. $n accordance with C7 @@ part 2 which welding symbol best represents a double “ E “ butt weld
!a"
!b"
!c"
!d"
-0-. Which is the most liely appearance of lac of root fusion on radiograph taen of a
77
92 8 9
single “ M “ butt weld !a" (&) !c" !d"
77
& dar straight line with a light root A da% s$%ai+-$ i*# i$- a da%#% %""$. & dar root with straight edges. & dar une)en straight line with a light root.
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