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WELDING INSPECTION, STEEL – WIS 5 MULTI – CHOICE QUESTION PAPER ( MSR – WI – 4) Answer a !"es#$%n &' Der Derea eas$ s$n n %*+ %*+%n %nen en#s #s are are esse essen# n#$a $a % %r r !"a !"a$# $#- we. we.$n $n /"# /"# w0en w0en we.e. s%*e aen# *a- 1 a' Ca"se %rr%s$% %rr%s$%n n +r%/e +r%/e*s *s /' Lea2e Lea2e res$ res$."e ."es s ' G$2e G$2e %3 #% #%$ $ aes aes d. All of the the abov above e ' Ce"%s Ce"%se e ee#r%.es ee#r%.es are %#en "se. %r #0e .e+%s$#$% .e+%s$#$%n n % a r%%# +ass %n +$+es we.e. $n #0e 6e.' T0$s $s /ea"se7 a' H-.r%en H-.r%en %n#r %n#r% % $s re!"$re. re!"$re. /' T0e 0$0 .e+%s$#$%n .e+%s$#$%n ra#e ra#e ."e #% #0e $r%n +%w.er +%w.er %n#en# %n#en# c. The hydrogen gas produced in the ux increases the arc voltage .' A % #0e #0e a/%2 a/%2e e 8' In #0e #0e we. we.$n $n % a"s# a"s#en en$# $#$ $ s#a$ s#a$n nes ess s s#ee s#ees s,, #0e #0e ee ee#r #r%. %.e e an. an. +a# +a#e e *a#er$as are %#en s+e$6e. #% /e %w ar/%n %n#en#' T0e reas%n %r #0$s1 a' T% +re2en# #0e #0e %r*a#$%n %r*a#$%n % ra9s ra9s $n #0e 0a: b. To prevent the formation formation of chromium chromium carbides carbides ' T% +re2en# +re2en# ra9$n ra9$n $n #0e #0e we. .' M$n$*$:e M$n$*$:e .$s#%r#$ .$s#%r#$%n %n 4' W$#0 rear.s rear.s #% a we.$n +r%e."re, +r%e."re, an essen#$a essen#$a 2ar$a/e 2ar$a/e *a-1 *a-1 a' C0ane C0ane #0e +r%+er +r%+er#$es #$es % % #0e we. we. /' In;"ene In;"ene #0e 2$s"a 2$s"a ae+# ae+#ane ane ' Re!"$re Re!"$re re
' W0$0 W0$0 % #0e % %% %w$n w$n .ee# .ee#s s w%". w%". s0%w "+ as $0# $0# $n.$a $n.$a#$% #$%ns ns %n a ra.$%ra+07 a' Sa $n"s $n"s$%ns $%ns an. %++er %++er $n"s $n"s$%n $%n b. Tungsten inclusions inclusions and excessive excessive root penetration ' Ca+ "n.er"# "n.er"# an. r%%# +$+$n +$+$n .' Eess$2e a+ 0e$0# 0e$0# an. $n%*+e#e $n%*+e#e r%%# +ene#ra#$%n +ene#ra#$%n ?' W0$0 % #0e %%w$n %%w$n ee#r%.es ee#r%.es $s #0e *%s# *%s# $9e$9e- #% %n#a$n %n#a$n #0e ares# !"an#$#- % %*/"s#$/e %ran$ %*+%"n.s7 a' =as$ /' A$ A$.$ ' R"#$e .' Cellulose' Cellulose' @' La*ea La*ear r #ear$n #ear$n $s #0e /es# +re2en# +re2en#e. e. /-1 1
a' T0e "se % +a#e *a#er$as *a#er$as %n#a$n$n %n#a$n$n %w e2es % $*+"r$#$es /' T0e "se "se % /"##er$n /"##er$n r"ns ' P%s# P%s# we. we. s#re s#ress ss re$e re$e d. Bo Both th a and and b e' A % #0e a/%2e a/%2e ' W0en W0en %ns %ns$. $.er er$n $n ra.$ ra.$% %ra ra+0 +0- "s$n "s$n
&B** .$a*e#er w$#0 n% $n#erna aess7 a' SWSI b. D!I ' DWDI .' SWSI<+ SWSI<+an% an%ra* ra*$ $'' &B' A /aane. we.$n #e0n$!"e %r %r ea*+e /a9 s#e+ we.$n $s *%s# %#en "se. %r1 a' C%n#r% C%n#r%$n $n a*e a*ear ar #ear$n #ear$n /' Inreas$n Inreas$n we. #%"0ness #%"0ness ' Re."$n Re."$n we. :%ne 0ar.ness 0ar.ness d. "educing educing disto distortio rtion n &&' &&' =as$ =as$ %a %a#e #e. . ee ee# #r% r%.e .es s 0a2 0a2e e w0$ w0$0 0 % #0e #0e % %% %w$ w$n n +r%+ +r%+er er#$ #$es es a' #igh mechanical properties may be used to produce $elds of high deposition rates and to produce $elds of lo$ hydrogen content ' /' r$a/e sa, sa, 0$0 *e0an$a *e0an$a s#ren#0 an. #% #% +r%."e we.s we.s % a %w 0-.r%en %n#en# ' L% L%w w 0-.r% 0-.r%en en %n#en %n#en## we.s, we.s, %%. s#%+s# s#%+s#ar# ar# +r%+er# +r%+er#$es $es an. 0$0 0$0 s#ren#0 .' L%w ar/%n %n#en# we.s, we.s, r$a/e r$a/e sa an. 0$0 s#ren#0 s#ren#0 &' &' On a ra. ra.$%r %ra+0, a+0, #0 #0e *%s *%s# $9 $9ee- a++e a++ear aran an e % a a9 9 % r% r%%# "s "s$%n $%n %n a s$ne<2 /"## we. $s 1 a. A dar% straig straight ht line line $ith a light light root root /' A .ar9 r%%# r%%# w$#0 w$#0 s#ra$ s#ra$0# 0# e.es e.es ' A .ar9 "ne2en "ne2en $ne $ne %%w$n %%w$n #0e e.e e.e % #0e r%%# r%%# .' N%ne % #0e a/%2e a9 % r%%# "s$%n an n%# /e seen %n a ra.$%ra+0
&8' W0a# .% -%" "n.ers#an. /- #0e #er* *$n$*"* $n#er+ass #e*+era#"re7 a' M$n +%s# +%s# we. 0ea# #rea# #rea#*en# *en# a++$e a++$e. . #% a we. /' M$n s#ress s#ress re$e re$e #e* #e* ' T0e %wes# %wes# #e* #e* #% /e /e "se. ."r$n ."r$n +re0ea# +re0ea# d. The lo$est tem allo$ed allo$ed during $elding $elding and bet$een $eld passes &4' &4' W0$ W0$0 0 % % #0e #0e % %% %w$ w$n n $s a++ a++$ $a/ a/e e #% a +a# +a#e e a* a*$n $na# a#$% $%n n a' T0e- are are /es# .e#e# .e#e#e. e. /- ra.$%r ra.$%ra+0a+0/' T0e- are *a$n*a$n- a"se. a"se. /- 0-.r%en 0-.r%en en#ra+*en# en#ra+*en# c. They origi originate nate in the parent parent mater material ial .' T0e- are a"se. a"se. w0en we.$n we.$n s#resses s#resses a# +arae +arae w$#0 #0e r%e. .$re#$%n % #0e +aren# +a#e &5' &5' W0$ W0$0 0 % % #0e #0e % % %w %w$n $n NDT NDT *e#0 *e#0%. %.s s w%" w%". . /e #0e #0e ea eas# s# e3 e3e e#$ #$2e 2e %n an a"s#en$#$ s#ee /"## we. 2
a' T0e "se % +a#e *a#er$as *a#er$as %n#a$n$n %n#a$n$n %w e2es % $*+"r$#$es /' T0e "se "se % /"##er$n /"##er$n r"ns ' P%s# P%s# we. we. s#re s#ress ss re$e re$e d. Bo Both th a and and b e' A % #0e a/%2e a/%2e ' W0en W0en %ns %ns$. $.er er$n $n ra.$ ra.$% %ra ra+0 +0- "s$n "s$n
&B** .$a*e#er w$#0 n% $n#erna aess7 a' SWSI b. D!I ' DWDI .' SWSI<+ SWSI<+an% an%ra* ra*$ $'' &B' A /aane. we.$n #e0n$!"e %r %r ea*+e /a9 s#e+ we.$n $s *%s# %#en "se. %r1 a' C%n#r% C%n#r%$n $n a*e a*ear ar #ear$n #ear$n /' Inreas$n Inreas$n we. #%"0ness #%"0ness ' Re."$n Re."$n we. :%ne 0ar.ness 0ar.ness d. "educing educing disto distortio rtion n &&' &&' =as$ =as$ %a %a#e #e. . ee ee# #r% r%.e .es s 0a2 0a2e e w0$ w0$0 0 % #0e #0e % %% %w$ w$n n +r%+ +r%+er er#$ #$es es a' #igh mechanical properties may be used to produce $elds of high deposition rates and to produce $elds of lo$ hydrogen content ' /' r$a/e sa, sa, 0$0 *e0an$a *e0an$a s#ren#0 an. #% #% +r%."e we.s we.s % a %w 0-.r%en %n#en# ' L% L%w w 0-.r% 0-.r%en en %n#en %n#en## we.s, we.s, %%. s#%+s# s#%+s#ar# ar# +r%+er# +r%+er#$es $es an. 0$0 0$0 s#ren#0 .' L%w ar/%n %n#en# we.s, we.s, r$a/e r$a/e sa an. 0$0 s#ren#0 s#ren#0 &' &' On a ra. ra.$%r %ra+0, a+0, #0 #0e *%s *%s# $9 $9ee- a++e a++ear aran an e % a a9 9 % r% r%%# "s "s$%n $%n %n a s$ne<2 /"## we. $s 1 a. A dar% straig straight ht line line $ith a light light root root /' A .ar9 r%%# r%%# w$#0 w$#0 s#ra$ s#ra$0# 0# e.es e.es ' A .ar9 "ne2en "ne2en $ne $ne %%w$n %%w$n #0e e.e e.e % #0e r%%# r%%# .' N%ne % #0e a/%2e a9 % r%%# "s$%n an n%# /e seen %n a ra.$%ra+0
&8' W0a# .% -%" "n.ers#an. /- #0e #er* *$n$*"* $n#er+ass #e*+era#"re7 a' M$n +%s# +%s# we. 0ea# #rea# #rea#*en# *en# a++$e a++$e. . #% a we. /' M$n s#ress s#ress re$e re$e #e* #e* ' T0e %wes# %wes# #e* #e* #% /e /e "se. ."r$n ."r$n +re0ea# +re0ea# d. The lo$est tem allo$ed allo$ed during $elding $elding and bet$een $eld passes &4' &4' W0$ W0$0 0 % % #0e #0e % %% %w$ w$n n $s a++ a++$ $a/ a/e e #% a +a# +a#e e a* a*$n $na# a#$% $%n n a' T0e- are are /es# .e#e# .e#e#e. e. /- ra.$%r ra.$%ra+0a+0/' T0e- are *a$n*a$n- a"se. a"se. /- 0-.r%en 0-.r%en en#ra+*en# en#ra+*en# c. They origi originate nate in the parent parent mater material ial .' T0e- are a"se. a"se. w0en we.$n we.$n s#resses s#resses a# +arae +arae w$#0 #0e r%e. .$re#$%n % #0e +aren# +a#e &5' &5' W0$ W0$0 0 % % #0e #0e % % %w %w$n $n NDT NDT *e#0 *e#0%. %.s s w%" w%". . /e #0e #0e ea eas# s# e3 e3e e#$ #$2e 2e %n an a"s#en$#$ s#ee /"## we. 2
a' /' ' d.
UT RT DPI &PI &>' T0e 0ar.es# +ar# % a *"#$<+ass we.e. %$n#, ass"*$n n% +%s# we. 0ea# #rea#*en# 0as 0a2e #a9en +ae $s 1 a. The #A' #A' of the the cap /' T0e HAF HAF % % #0e #0e r%%# r%%# ' T0e r% r%%# .' T0e a+ a+ &?' Is $# +er +er*$ss$/e #% a%w a s$n s$ne +ass /"## we we. #% %% %% .%wn /e#ween we. +asses7 a' I# s0%". s0%". /e "+ #% #0e #0e we.$n we.$n $ns+e $ns+e#%r #%r /' N% #0e we. we. *"s# /e /e 9e+# 0%# a# a a #$*e ' I# .e+e .e+en.s n.s %n %n #0e we. we.er er d. It depends depends on the speci(cat speci(cation ion re)uiremen re)uirements ts &@' T0e "s"a *e#0%. % assess$n #0e sens$#$2$#- an. .ens$#- % a ra.$%ra+0 $s /- *ean a' Dens$#%* Dens$#%*e#er e#er an. .%s$*e#e .%s$*e#er r b. Penetra Penetrameter meter and and a densitomet densitometer er ' IQI an. a .%s$ .%s$*e# *e#er er .' IQI an. ;"*e# ;"*e#er er &' In #0e s"/ s"/*ere. ar we we.$n +r%ess, #0e "se % e eess$2e 0$0 2%#aes w%". res"# $n7 a' Ins"$en# Ins"$en# ;" *e#$n *e#$n b. *xcessiv *xcessive e ux melting melting ' Sa Sa re*%2a re*%2a .$" .$"# #$es $es .' E Ees ess$2 s$2e e s+a## s+a##er er B' W0$0 % #0e %%w$n we.$n +r%ess "ses a res$s#$2e 0ea#$n s-s#e* #% a0$e2e we. *e#a .e+%s$#$%n a' NMA /' Res$s#an Res$s#an## s+%# s+%# we.$ we.$n n c. *lec *lectr tro+s o+sla lag g .' r$#$%n r$#$%n we.$n we.$n &' &' We.$ e.$n n a s#e s#ee e +a# +a#e e w$# w$#0 0 a CE CE % % B'4 B'45 5 w%" w%". . re!" re!"$r $re e +re +re0e 0ea# a#$n $n #%7 #%7 a' Pre2en# Pre2en# #0e %r*a#$ %r*a#$%n %n % s"+0$. s"+0$.es es b. Prevent Prevent harden hardening ing in the the #A' #A' ' Pre2en# Pre2en# #0e %r*a#$% %r*a#$%n n % ar/$. ar/$.es es .' T% re."e #0e #0e a*%"n# % "rren# re!"$re. re!"$re. ' W0a# .%es #0e ?B re+resen# %n an E?B &B AWS A5'& ass$6e. ee#r%.e7 a' ?B n* n** * *$n UTS /' ?B %"es %"es *$n $*+a $*+a## s#ren#0 s#ren#0 ' ?B,BBB ?B,BBB P'S'I P'S'I *$n *$n -$e. s#ren s#ren#0 #0 d. ,---,---- P!I min min /T! /T! 8' 8' =as$ as$ e ee# e#r%. r%.e +r +r%2$ %2$.e. .e. $n $n a s#an.a an.ar. r. +a9a a9a$ $n n a. !hou !hould ld be ba% ba%ed as to manu manufa fact ctur ures es reco recomm mmen enda dati tion ons s prio prior r to used. /' T0e /a9$n /a9$n %n.$#$%ns %n.$#$%ns .e+en. "+%n "+%n #0e we.er 3
' Are re%**en.e. %r "se w0ere +%r%s$#- ree we.s are re!"$re. .' Are %n- s"$#a/e %r we.$n $n #0e ;a#, 2er#$a, an. .%wn 0an. +%s$#$%n 4' Ce"%se ee#r%.es 0a2e w0$0 % #0e %%w$n +r%+er#$es7 a' $s%"s sa, are 2%"*es % s0$e.$n as an. UTS 2a"es a/%2e B,BBB PSI b. 0arge volumes of shielding gas hydrogen contents123 ml per 2--g of $eld metal deposited and should be never ba%ed ' Lare 2%"*es % s0$e.$n as, 0$0 s+a##er %n#en#s an. 0-.r%en e2es &5 * +er &BB % we. *e#a .e+%s$#e. .' H$0 s+a##er %n#en#s ,0$0 .e+%s$#$%n an. are 2%"*es % as s0$e. 5' r%* #0e %%w$n ee#r%.e %.$n E5B 4 = &>B B H5, #0e %*+"s%r- +ar# $s1 a' E5B 4 / &>B B 05 /' = &>B B 05 c. *3- 4 B .' N%ne % #0e a/%2e
>'
W0$0 % #0e %%w$n $s a++$a/e #% ee#r%.e e$en-7 a' T0e *ass % *e#a .e+%s$#e. as a +eren#ae % #0e *ass %re w$re *e#e. /' Ir%n +%w.er ee#r%.es 0a2e e$en$es a/%2e &BBJ ' Ee#r%.es % 0$0 e$en$es #en. #% +r%e."re we.s % a s*%%#0 ;a# +r%6e d. Both a and b e' A % #0e a/%2e ?' A a#$"e ra9s ra#"re s"rae $s1 a' R%"0 ran.%*- #%rn b. !mooth ' S#e+ $9e a++earane .' =r$0# r-s#a$ne @' E>B&4 ee#r%.e w%". *%s# +r%/a/- "se. %r we.$n a. 0o$ pressure pipe$or% /' H$0< +ress"re +$+ew%r9 ' er#$a .%wn we.$n %n s#%rae #an9s .' In a s$#"a#$%n w0ere %w 0-.r%en we.s are s+e$6e. ' W0$0 ee*en# $n s#ee $ +resen# $n s$n$6an# a*%"n#s *a- ea. #% 0%# s0%r#ness a' P0%s+0%r"s /' Mananese ' S$$%n d. !ulphur MULTI – CHOICE END O COURSE ASSESSMENT 4
QUESTION PAPER (MSR
&' W0a# $s #0e ra#$% /e#ween #0e en#0 an. #0e .es$n #0r%a# #0$9ness %n a *$#re 6e# we. w$#0 e!"a e en#0s a' &1& /' 1& c. 2.42452 .' I# .e+en.s %n #0e 6e# we.s .$*ens$%ns an. 6# "+ re!"$re*en#s ' W0a# $s #0e e en#0 % a 6e# we.7 a' T0e .$s#ane r%* #0e #%e #% ae /' T0e .$s#ane r%* #0e r%%# #% ae en#er c. The distance from the root to the toe .' T0e .$s#ane r%* #0e #%e #% #%e 8' W0- $s #0e ar s0$e.e., w0en "s$n an ar we.$n +r%ess a' T% e$*$na#e 0-.r%en r%* #0e ar /' T% re#ar. #0e %%$n ra#e % #0e s%$.$-$n *e#a c. To excluded the atmosphere from the arc region .' T0e ar $s n%# awa-s s0$e.e. w0en "s$n an ar we.$n +r%ess 4' W0$0 % #0e %%w$n $s a++$a/e %r a n%ne +anar .ee#s7 a' T0e- are awa-s re+a$re. /' T0e$r e$s#ene w$ res"# $n #0e re*%2a % #0e en#$re we. c. They are not usually as signi(cant as planar defects .' T0e- an %n- /e .e#e#e. "s$n ra.$%ra+05' La*ear #ear$n $s1 a' A +r%."# .ee# a"se ."r$n #0e *an"a#"r$n % er#a$n s#ees b. A crac% type $hich occurs in the parent material due to $elding strains acting in the short transverse direction of the parent material ' A #-+e % 0%# ra9 ass%$a#e. w$#0 $*+"r$#$es(s"+0"r, ar/%n, an. +0%s+0%r%"s) .' A #-+e % ra9 #0a# %"rs $n #0e we. %r +aren# *a#er$a ."e #% -$ s#resses >' T0e we. :%ne ass%$a#e. w$#0 a we.e. %$n# $s 1 a. eld metal #A' and the parent material in the immediate vicinity /' We. *e#a %n' T0e we. *e#a +"s +aren# *a#er$a .' HAF an. +aren# *a#er$a ?' W0$0 % #0e %%w$n ee*en#s $ +resen# $n s$n$6an# !"an#$#$es $n s#ee *a- ea. #% %. s0%r#ness a' S"+0"r b. Phosphorus ' S$$%n .' C%++er @' A /a9 #r$an"ar ;a "se. $n %n"n#$%n w$#0 a we. s-*/% as #% en 558 *eans1 a' A s+e$6 we.$n +r%ess $s re!"$re. 5
/' T0e we. $s #% /e *a.e "n.er %ns#an# s"+er2$s$%n % a !"a$6e. we.$n $ns+e#%r c. elding to be carried out on site6(eld $eld7 .' T0e we. *"s# /e s"/e#e. #% NDT ' A"s#en$#$ s#a$ness s#ee an /e rea.- $.en#$6e. /-1 a. 0ac% of magnetic attraction /' I#s e#re*e 0ar.ness ' er- s0$nn- a++earane .' N%ne % #0e a/%2e &B' W0$0 % #0e %%w$n $s $9e- #% /e %ns$.ere. an essen#$a 2ar$a/e %n a we.$n +r%e."re a' A 0ane r%* an ee#r%.e ass$6e. #% AWS E>B&& #% an ee#r%.e E>B& /' A 0ane $n +re0ea# #e* r%* 5B% #% &5B% ' A 0ane $n we.$n +%s$#$%n r%* +a #% + d. All of the above &&' W0$0 % #0e %%w$n $s a++$a/e $ #0e 0ea# $n+"# #% 0$0 ."r$n #0e .e+%s$#$%n % a we. *a.e "s$n #0e MMa we.$n +r%ess7 a. 0o$ toughness /' H$0 s"se+#$/$$#- #% 0-.r%en en#ra+*en# ' H$0 0ar.ness' .' H$0 s"se+#$/$$#- #% a9 % "s$%n &' W0$0 % #0e %%w$n w$ $n;"ene #0e a*%"n# % .$s#%r#$%n %n a %*+%nen# ."r$n an. a#er we.$n a' Hea# $n+"# /' La9 % res#ra$n# c. &aterial properties .' =%#0 a an. / e' A % #0e a/%2e &8'w0en we.$n w$#0 #0e MIG we.$n +r%ess "s$n +"re ar%n as #0e s0$e.$n as %n ar/%n s#ee, w0$0 % #0e %%w$n +r%/e*s are $9e- #% %"r7 a' C%++er $n"s$%ns an. eess$2e a+ 0e$0#s /' Eess$2e r%%# +ene#ra#$%n an. +%r%s$#' Sa $n"s$%ns an. ra#er +$+e d. 0ac% of fusion and poor cap pro(les &8' I# $s a re!"$re*en# #% ea2a#e a ra9 $n a we.e. %*+%nen#K #0e .ee# $s a# eas# 5 ** .e+#0, w0$0 % #0e %%w$n w%". -%" e+e# #% /e .%ne #% re*%2e #0e .ee# a' Ar a$r, r%"n. 6n$s0 an. 0e9e. w$#0 ra9 .e#e#$%n /' T0er*a %"$n, r%"n. 6n$s0 an. 0e9 w$#0 MPI ' O-<as "##$n, r%"n. 6n$s0 an. 0e9e. w$#0 ra9 .e#e#$%n d. Both a and b e' A % #0e a/%2e &4' T0e 0ea# a3e#e. :%ne ass%$a#e. w$#0 a "s$%n we.7 a' Us"a- 0as #0e 0$0es# #ens$e s#ren#0 /' Awa-s e$s#s $n a "s$%n
d. All of the above &5' W0$0 % #0e %%w$n we.$n +r%esses w%". /e #0e *%s# s"$#e. %r #0e we.$n % ar/%n s#ee $n eess % &BB ** #0$9ness a' T"ns#en $ner# as b. *lectro+slag ' Man"a *e#a ar .' Pas*a ar &>' A we.$n +r%ess w0ere #0e we.$n +an# %n#r%s #0e #ra2e s+ee. an. ar a+, /"# "n.er #0e %ns#an# s"+er2$s$%n "s$n a s0$e.$n as *$#"re % @BJ ar%n –BJ ar/%n .$%$.e $s #er*e. as 1 a' A *an"a MAG +r%ess /' A se*$ a"#%*a#$ MAG +r%ess c. A mechani8ed &I9 process .' a *e0an$:e. MAG +r%ess &?' T0e +"r+%se % n%r*a$:$n s#ee a. To modify the grain structure by ma%ing it more uniform on order to improve mechanical properties /' T% s%#en a *a#er$a %r e#ens$2e *a0$n$n ' T% re."e ra#"re #%"0ness .' T% re."e ."#$$#&@' W0$0 % #0e %%w$n .es#r"#$2e #es#s w%". s0%w #0e res"#s $n %"es7 a' Tens$e #es# b. Charpy test ' =en. #es# .' Har.ness #es# &' Genera- #0e *%s# s"$#a/e *e#0%. % .e#e#$n a9 % s$.ewa "s$%n %n a s$ne –2 /"## we. (8B % #% 85% /e2e anes) w%". /e1 a. /ltrasonic testing /' Ra.$%ra+0$ #es#$n ' Mane#$ +ar#$e #es#$n .' =%#0 a an. / e' A % #0e a/%2e B' U#ras%n$ #es#$n $s +reera/e #% ra.$%ra+0$ #es#$n ."e #% a' A/$$#- #% 6n. a .ee#s /' L%wer a*%"n# % %+era#%r s9$ re!"$re. c. Ability to detect laminations .' N%ne % #0e a/%2e &' La*ear #ear$n 0as %"rre. $n a s#ee a/r$a#$%n /e%re we.$n %"., w0$0 % #0e %%w$n #es# *e#0%.s %". 0a2e .e#e#e. $#7 a' Ra.$%ra+0$ #es#$n /' U#ras%n$ ' Mane#$ +ar#$e d. It could not be found by any testing method ' In%*+e#e r%%# +ene#ra#$%n $s *%s# $9e- ."e #% 1 a' We.$n s+ee. #%% s%w /' We.$n "rren# #%% 0$0 c. "oot gap too small .' Ee#r%.e .$a*e#er #%% s*a 7
4' %" are #% %2ersee #0e ar we.$n % s%*e *a0$ne. 6##$ns an. #0a# #0eare a.*$"* +a#e.' W0a# w%". -%" .% $n #0$s s$#"a#$%n a' Per*$# #0e we.$n #% +r%ee. /' Per*$# #0e we.$n #% +r%ee. w$#0 "*e e#ra#$%n c. !top the operation at once .' A.2$se #0e we.ers #% .r$n9 *$9 #0en +r%ee. 5' On a s$ne – /"## we., #0e .$s#ane #0r%"0 #0e en#er % #0e we. r%* r%%# #% ae $s ae.1 a' Re$n%re*en# /' Pene#ra#$%n c. Throat thic%ness .' N%ne % #0e a/%2e >' W0$0 % #0e %%w$n ;a*e #-+es w%". -%" e+e# #% /e "se. %r #0e "##$n % *$. s#ee7 a' Car/"r$s$n ;a*e /' O$.$:$n ;a*e ' Re."$n ;a*e d. :eutral ame ?' T0e nee. %r #0e +re<0ea# %r s#ee w$ $nrease $ 1 a' T0e *a#er$a #0$9ness re."es b. ;aster $elding speeds ' T0e "se % #0e arer we.$n ee#r%.e .' A % #0e a/%2e @' T0e *a$n reas%n %r #%e /en.$n %n er#a$n we.e. s#ee %*+%nen#s $s 1 a' C%rr%s$%n %ns$.era#$%ns b. ;atigue life ' A++earane .' A % #0e a/%2e ' W0$0 % #0e %%w$n we.$n +r%ess re!"$re a .r%%+$n 0ara#er$s#$ +%wer s%"re a. TI9 and &&A /' MIGMAG an. MMA ' TIG an. saw .' A % #0e a/%2e 8B' W0en %ns$.er$n #0e MIGMAG we.$n +r%ess w0$0 % #0e %%w$n *e#a #ranser *%.es w%". /e #0e /es# s"$#e. #% #0e we.$n % #0$9 +a#es %2er 5 **, ;a# we.$n +%s$#$%n a' D$+ #ranser /' P"se #ranser c. !pray transfer .' G%/"ar #ranser MSR
' w0a# $s #0e e en#0 % a 6e# we. 7 a' #0e .$s#ane r%* #0e #%e #% ae /' #0e .$s#ane r%* #0e r%%# #% ae en#re c. the distance from the root to the toe .' #0e .$s#ane r%* #0e #%e #% #%e 8' w0a# $s #0e #0r%a# #0$9ness % a 6e# we. ( e!"a e en#0 ) 7 a' #0e .$s#ane r%* #0e #%e #% #0e ae b. the distance from the root to the face centre ' #0e .$s#ane r%* #0e r%%# #% #0e #%e .' #0e .$s#ane r%* #0e #%e #% #%e 4' a+ %$n#s %n#a$n 1 a. (llet $eld /' %rner %$n# ' /"##
' "n.er *%s# %n.$#$%ns, w0$0 % #0e %%w$n we.$n +%s$#$%ns w$ .e+%s$# #0e *%s# we. *e#a' a' 2er#$a .%wn /' %2er0ea. ' 0%r$:%n#a<2er#$a .' at 6 do$n hand ) ?' w0a# *ean /- #0e #er* ra#er +$+e 1 a' an%#0er #er* %r %na2e r%%# /' an%#0er #er* $2en %r a /"rn #0r%"0 ' a #-+e % as +%re, %"n. $n #0e we. ra#er d. a shrin%age defect found in the $eld crater @' w0a# *ean /- #0e #er* we. "n#$%n 7 a' #0e area %n#a$n$n #0e HAF an. #0e we. *e#a /' #0e we. *e#a an. #0e +aren# *e#a c. the boundary bet$een the fusion 8one and the #A' .' #0e +ar# % #0e we., w0$0 0as "n.er%ne *e#a"r$a 0ane ."e #% #0e 0ea# r%* we.$n ' #0e s#ren#0 $ #0e 6e# we. $s +r$*ar- %n#r%e. /- 1 a' e en#0 b. throat thic%ness ' we. #0$9ness .' a % #0e a/%2e &B' a ra#er ra9 *a- as% /e #er*e. 1 a' %. ra9 /' #ear$n ' a#$"e ra9 d. star crac% 9
&&' w0$0 % #0e %%w$n we.$n +r%esses #e0n$!"e $s $9e- #% /e "se. %r #0e re+a$r we.$n % %a$:e. +%r%s$#- $n a /"## we. a' MMA, PG +%s$#$%n /' Me0an$se. MAG ' S"/*ere. ar .' A % #0e a/%2e e. :one of the above &' ' w0$0 % #0e %%w$n we.s w%". /e %ns$.ere. $n a s$#"a#$%n w0ere #w% +a#e are #% /e %$ne. #0a# %2era+ ( ass"*e n% e#erna assess ) a' a 6e# we. /' a s$ne – /e2e /"## we. c. a plug $eld .' a s$ne – U /"## we. &8' $n #0e MMA we.$n +r%ess, ' w0$0 % #0e %%w$n $s *%s# $9e- #% /e a"se. /- a we.er w$#0 a +%%r #e0n$!"e 7 a. deep $eld craters< crater crac%s /' %++er $n"s$%ns ' 0-.r%en ra9s .' a % #0e a/%2e &4' r%%# %na2$#- $s a"se. /- 1 a' eess$2e /a9 +"re +ress"re an. en#ra++e. as /' eess$2e /a9 +"re +ress"re an. 2er- 0$0 0ea# $n+"#s ' eess$2e r%%# r$n.$n an. a s%w #ra2e s+ee. d. excessive root grinding and excessive bac% purge pressure &5'w0en $ns+e#$n a r$#$a %*+%nen#, #0e #%es % a we. *"s# /e 1 a. awa-s r%"n. ;"s0 b. *"s# awa-s %2era+ a# eas# &'5 ** %n#% #0e +aren# *a#er$aK c. *"s# awa-s /e $ns+e#e. "s$n a ra9 .e#e#$%n *e#0%. ( MPI, DPI 7 d. none of the above can be selected+ speci(cation re)uirements &>' w0en arr-$n %"# 2$s"a $ns+e#$%n, #0e s+e$6a#$%n *a9es n% *en#$%n % #0e re!"$re*en#s %r 2$s"a $ns+e#$%n, $n #0$s s$#"a#$%n w0a# s0%". -%" .% a' arr- %"# n%r*a 2$s"a $ns+e#$%n b. see% advice from higher authority ' arr- %"# n% 2$s"a $ns+e#$%n .' re< wr$#e #0e re!"$re*en#s % #0e s+e$6a#$%n &?' "n.er *%s# $r"*s#anes, w0$0 % #0e %%w$n .% -%" %ns$.er #% /e ."#$es % a we.$n $ns+e#%r a' #0e s"+er2$s$%n % we.ers /' +r%e."re wr$#$n c. )ualifying $elder .' a % #0e a/%2e &@' w0$0 % #0e %%w$n $s *%s# $9e- #% a"se a /"rn #0r%"0 a' r%%# a+ #%% s*a /' #ra2e s+ee. #%% as# c. root face too small .' a % #0e a/%2e &' $n an ar we.$n +r%ess, w0$0 % #0e %%w$n $s #0e %rre# #er* "se. %r #0e a*%"n# % we. *e#a .e+%s$#e. +er *$n"#e 7 10
a' 6$n ra#e b. deposition rate ' we. .e+%s$#$%n .' we. ."#- -e B' w0a# $s #0e #er* $2en %r #0e area % a we.er %$n# "s# %"#s$.e #0e we. *e#a #0a# 0as "n.er%ne *$r% s#r"#"ra 0ane 7 a. heat a=ected 8one /' #0e we. :%ne ' "s$%n :%ne .' a % #0e a/%2e #er*s *a- /e "se. &' w0en arr-$n %"# 2$s"a $ns+e#$%n, w0$0 .ee# (s) $s $9e- #% /e *$sse. 7 a' $near *$sa$n*en# /' a+ "n.er"# ' +%r%s$#d. lac% of fusion 6 inter run 7 ' %. a++$n $s an%#0er #er* %r 1 a. lac% of fusion at the toe of a $eld /' a9 "s$%n /e#ween we. *e#a an. we. *e#a ' "n.er"# a# #0e #%e % a we. .' /%#0 a an. / 8' $n%*+e#e r%%# +ene#ra#$%n $s *%s# $9e- ."e #% 1 a' we.$n s+ee. #%% s%w /' we.$n "rren# #%% 0$0 c. root gap too small .' ee#r%.e .$a*e#er #%% s*a 4' ra#er ra9 $s are a"se. *a$n- /- 1 a' eess$2e- as# we.$n s+ee.s /' $*+r%+er ee#r%.e ane c. hot shrin%age .' $*+r%+er %$n# .es$n 5' %n a s$ne< /"## we., #0e .$s#ane #0r%"0 #0e en#er % #0e we. r%* r%%# #% ae $s ae. 1 a' re$n%re*en# /' +ene#ra#$%n c. throat thic%ness .' n%ne % #0e a/%2e >' #0e #0r%a# #0$9ness % a $n0 6e# we. $s 7 a' ?'5** /' 4** c. 2>.3mm .' &'5** ?' #0e nee. %r +re<0ea# %r s#ee w$ $nrease $ 1 a' #0e *a#er$a #0$9ness re."es b. faster $elding speeds ' #0e "se % a arer we.$n ee#r%.e .' a % #0e a/%2e 11
@' w0$0 % #0e %%w$n /"## we. +re+ara#$%ns $s *%s# $9e- #% /e %ns$.ere. %r #0e we.$n % a >** #0$9 +a#e 7 a' .%"/e – /"## /' as-**e#r$a .%"/e – /"## ' s$ne U /"## d. single ?@ butt ' a we.$n $ns+e#%rs *a$n a##r$/"#es $n".e 1 a' 9n%we.e /' 0%nes#- an. $n#er$#' %%. %**"n$a#%r d. all of the above 8B' a %.e % +ra#$e %r 2$s"a $ns+e#$%n s0%". %2er 1 a. before during and after $elding /' /e%re we.$n a#$2$#$es %n' a#er we.$n a#$2$#$es %n.' n%ne % #0e a/%2e MSR
' we.s *a.e w$#0 0$0 0ea# $n+"#s s0%w a re."#$%n $n %ne % #0e %%w$n +r%+er#$es 7 a' ."#$$#12
/' #%"0ness ' e%na#$%n .' +ene#ra#$%n ?' w0$0 % #0e %%w$n s#ee #-+es w%". $2e r$se #% #0e %r*a#$%n % +%r%s$#- w0en a"#%en%"s- we. w$#0 an ar we.$n +r%ess a' "- 9$e. s#ee /' se*$ 9$e. s#ee ' r$**$n s#ee .' /aane. s#ee @' w0$0 % #0e %%w$n ee*en#s, w0$0 *a- /e a..e. #% s#ee' Has #0e rea#es# a3e# %n ree+ s#ren#0 a' #"ns#en /' *ananese ' ar/%n .' *%-/.en"* ' #0e HAF ass%$a#e. w$#0 a "s$%n we. a' an n%# /e a2%$.e. /' "s"a- 0as #0e 0$0es# #ens$e s#ren#0 ' $s "s"a- *ar#ens$#$ .' /%#0 a an. / e' a % #0e a/%2e &B' w0a# %"r r$#er$a are neessar- #% +r%."e 0-.r%en $n."e. %. ra9$n 7 a' 0-.r%en, *%$s#"re, *ar#ens$#$ ra$n s#r"#"re an. 0ea# /' 0-.r%en, +%%r we. +r%6es, #e* a/%2e BB %C an. a s%w %%$n ra#e ' 0-.r%en, a ra$n s#r"#"re s"se+#$/e #% ra9$n, s#rees an. a #e* /e%w BB%C ' .' 0-.r%en, e$s#$n we. .ee#s, s#ress an. a ra$n s#r"#"re s"se+#$/e #% ra9$n' &&' a ar/%n e!"$2aen# (CE) % B'5J 1 a' $s 0$0 %r ar/%n *ananese s#ee an. *a- re!"$re a +re0ea# %2er &BB%' /' $s enera- s$n$6an# %r ar/%n %r *ananese s#ees an. $s er#a$n- n%# #% /e #a9en $n#% %ns$.era#$%n %r +re0ea# #e*' ' Is 0$0 %r ar/%n *ananese s#ees an. *a- re!"$re a +re0ea# #e* %2er 8BB% as #% a2%$. ra9$n .' Is a"a#e. r%* #0e 0ea# $n+"# %r*"a' e' Is a"a#e. r%* #0e 0ea# $n+"# %r*"a
&' $n a *ar#ens$#$ ra$n s#r"#"re w0a# w%". -%" e+e# #% $nrease 7 a' ."#$$#/' 0ar.ness ' #%"0ness .' a % #0e a/%2e &8' w0a# .% -%" "n.ers#an. /- #0e #er* *$n$*"* $n#er+ass #e* 7 a' *$n +%s# we. 0ea# #rea#*en# a++$e. #% a we. /' *$n s#ress re$e #e* 13
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' +%r%s$#- $s a"se. /- 1 a' en#ra++e. sa $n #0e s%$.$-$n we. b. entrapped gas in the solidifying $eld ' en#ra++e. *e#a$ $n"s$%n $n #0e s%$.$-$n we. .' n%ne % #0e a/%2e &?' $n a /en. #es#, #0e ae % #0e s+e$*en $s $n #ens$%n an. r%%# $s $n %*+ress$%nK #0e #-+e % #es# /e$n arr$e. %"# w%". /e 1 a' a r%%# /en. #es# /' a s$.e /en. #es# c. a face bend test .' n%ne % #0e a/%2e &@' "#ras%n$ #es#$n $s % a.2an#ae $n .e#e#$n w0$0 % #0e %%w$n we. $*+ere#$%ns %2er %#0er NDT *e#0%.s 1 a. lac% of side $all fusion /' s"rae "n.er"# ' $n%*+e#e- 6e. r%%2e .' %2era+ &' #0e +r%ess % #e*+er$n $s %#en arr$e. %"# #% rea$n #%"0ness a#er w0$0 % #0e %%w$n +r%esses 1 a' annea$n /' n%r*a$:$n c. hardening .' s#ress re$e2$n B #0e +resene % $r%n s"+0$.e $n #0e we. *e#a $s *%s# $9e- #% +r%."e w0$0 % #0e %%w$n "+%n %n#ra#$%n % #0e we. 1 a. solidi(cation crac%ing /' 0-.r%en ra9$n ' $n#er ran"ar %rr%s$%n .' s#ress %rr%s$%n ra9$n MCQ BB8 &' #0e =r$#$s0 %.e %r $s"a Ins+e#$%n Re!"$re*en#s $s 1 a' =S 4@? 20
/' =S 4 ' =S 4@?B d. :one of the above ' a %.e % +ra#$e %r 2$s"a $ns+e#$%n s0%". %2er #0e %%w$n a' before during and after $elding activi #$es /' /e%re we.$n a#$2$#$es %n' a#er we.$n a#$2$#$es %n.' n%ne % #0e a/%2e 8' $n%*+e#e r%%# +ene#ra#$%n $n a /"## %$n# %". /e a"se. /- 1 a' eess$2e r%%# ae w$.#0 /' eess$2e r%%# a+ s$:e ' %w "rren# se##$n d. both a and c 4' $n%*+e#e r%%# "s$%n w%". er#a$n- /e a"se. /a. linear misalignment /' $n%rre# #$# ane ' .$3er$n r%%# ae w$.#0s .' a % #0e a/%2e 5' w0en 2$s"a- $ns+e#$n a %*+e#e. s$ne 2ee /"## we. a+ -%" w%". er#a$n- assess a' a+ 0e$0# /' #%e /en. ' we. w$.#0 d. a b and c >' -%" n%#$e a 2er- 2ee. r$++e s0a+e' T0$s $s *%s# $9e- a"se. /- 1 a' +%%r %ns"*a/e 0%$e /' we.$n +%s$#$%n c. excessive travel speed .' a % #0e a/%2e ?' #%e /en.$n $s $*+%r#an# as $# *a- a3e# a' %rr%s$%n b. fatigue life ' %2era+ #-+e .ee#s .' a % #0e a/%2e @' sa $n"s$%ns w%". %"r w$#0 a' *an"a *e#a ar /' *e#a $ner# as ' s"/*ere. ar we.$n d. both a and c ' "n.er"# $s +r$n$+a- a"se. /a' eess$2e a*+s /' eess$2e 2%#s ' eess$2e #ra2e s+ee. d. all of the above &B' "n.er"# $s n%r*a- assesse. /a. its depth /' $#s en#0 ' $#s /en.$n .' a % #0e a/%2e 21
&&' a we.$n +r%e."re $s "se" #% 1 a' $2e $n%r*a#$%n #% #0e we.er /' $2e $n%r*a#$%n #% #0e $ns+e#%r ' $2e %n6.ene #% a +r%."# d. all of the above &' an essen#$a 2ar$a/e *a- 1 a' a 0ane #0e +r%+er#$es % #0e we. /' $n;"ene #0e 2$s"a ae+#a/$$#c. re)uire re+approval of a $eld procedure .' a % #0e a/%2e &8' a *an$-$n ass *a- /e "se. ."r$n 2$s"a $ns+e#$%n /"# =S 5@ s#a#es #0a# $#s *an$6a#$%n s0%". /e 1 a. "+ #% 5 b. E+E.3 c. 5<&B d. n%ne % #0e a/%2e &4' w0en 2$s"a- $ns+e#$n a 6e# we., $# w%". n%r*a- /e s$:e. /- 1 a' #0e e en#0 /' #0e a#"a #0r%a# #0$9ness ' #0e .es$n #0r%a# #0$9ness d. both a and c &5' a +anar .ee# $s a' $n%*+e#e "s$%n .ee#s /' sa $n"s$%n ' $n%*+e#e +ene#ra#$%n d. both a and c &>' +ene#ra#e $ns+e#$%n an. *ane#$ +ar#$e $ns+e#$%n are *a$n- "se. #% a' a$. 2$s"a $ns+e#$%n /' /ea"se #0e a++$a#$%n s#an.ar. sa-s s% ' #% %n6r* 2$s"a "ner#a$n#$es d. all of the above &?' .ee#s %"#s$.e % #0e $*$#s s+e$6e. $n a s#an.ar. s0%". awa-s /e 1 a. repaired /' re+%r#e. #% a sen$%r +ers%n ' assesse. a%n w$#0 %#0er .ee#s .' a % #0e a/%2e &@' MIG we.$n #en.s #% /e s"se+#$/e #% a9 % "s$%n +r%/e*s' T0$s $s /ea"se % 1 a' +%%r *a$n#enane % e!"$+*en# /' $n%rre# se##$ns ' +%%r $n#er"n ean$n d. all of the above &' *an"a *e#a ar ee#r%.es an /e r%"+e. $n#% #0ree *a$n #-+es' T0ese are a. basic cellulocis and rutile /' ne"#ra e"%s$ an. r"#$e ' /as$ e"%s$ an. ne"#ra .' n%ne % #0e a/%2e B' #0er *a$n a"ses % +%r%s$#- $n we.e. %$n#s are 22
a' +%%r aess /' %ss % as s0$e. ' .$r#- *a#er$as d. all of the above &' ra9s $n we.s *a- /e ."e #% a' s%$.$6a#$%n +r%/e*s /' 0-.r%en +r%/e*s ' eess$2e s#resses d. all of the above ' a wea2e #e0n$!"e *a- $2e r$se #% a' /e##er +r%6es /' $*+r%2e. #%e /en.$n ' $*+r%2e. r$++e s0a+e d. all of the above 8' w$#0 reerene #% a r%%# +ene#ra#$%n /ea., -%" %". er#a$n- assess a. root fusion and penetration /' r%%# %na2$#' /"rn #0r%"0 .' a % #0e a/%2e 4' a a#$"e a$"re $s 0ara#er$s#$ /- #0e a++earane % #0e ra#"re s"rae' I# w%". /e 1 a' r%"0 an. #%rn /' 0e2r%n – $9e c. smooth .' n%ne % #0e a/%2e 5' s#ra- ar$n *a- /e rear.e. as a ser$%"s .ee#' T0$s $s /ea"se 1 a' $# *a- re."e #0e #0$9ness .$*ens$%n % a %*+%nen# /' $# *a- a"se $!"a#$%n ra9s ' $# *a- a"se 0ar. :%nes d. all of the above >' %2era+ $n we.s %". /e $n;"ene. /a' +%%r we.$n #e0n$!"e /' we.$n +r%ess ' we.$n +%s$#$%n d. all of the above ?' ;a*e "# +re+ara#$%ns *a-, ."r$n we.$n, $nrease #0e $9e$0%%. % a' ra9$n /' *$sa$n*en# +r%/e*s ' $n"s$%ns d. all of the above @' *ar%s%+$ ea* re!"$res an- s+e$*en #% /e $ns+e#e. a' %ne, a#er e#0$n b. t$ice before and after etching ' "s$n a *$r%s%+e .' n%ne % #0e a/%2e ' w0$0 % #0e %%w$n *a- /e asse. as a *%re ser$%"s .ee# a' sa $n"s$%ns /' "s$%n .ee#s ($n#er"n) c. fusion defects 6surface 7 23
.' +%r%s$#8B' a %.e % +ra#$e $s 1 a' a s#an.ar. %r w%r9*ans0$+ %nb. a set of rules for manufacturing a speci(c product ' e2es % ae+#a/$$#- % a we.*en# .' n%ne % #0e a/%2e
END O COURSE MULTI CHOICE PAPER (MCQ'BB) &' ' 8' W0a# #w% "n#$%ns $n ar we.$n *"s# /e $n e!"$$/r$"* #% ena/e a s#a/e ar #% /e es#a/$s0e.7 a. Arc voltage /' C"rren# ' W$re
' W0a# #-+e % +%wer s%"re 0ara#er$s#$ $s re!"$re %r *an"a we.$n7 a' C%ns#an# 2%#ae /' a# 0ara#er$s#$ c. Drooping characteristic .' M%#%r enera#%r ?' W0$0 %ne % #0e %%w$n .es#r"#$2e #es#s w%@. $n.$a#e. #0e #%"0ness % we. *e#a – HAF a' Mar% /' N$9 /rea9 ' Har.ness d. Charpy @ee :otch
@' Dereas$n %*+%nen#s are essen#$a %r !"a$#- we.$n /"# s%*e aen#s *aa' Ca"se %rr%s$%n +r%/e* /' G$2e %3 +0%sene as ' Lea2e res$."es d. All of the above 24
' W0$0 % #0e %%w$n 0e*$a ee*en#s 0as #0e rea#er e3e# %n #0e 0ar.en a/$$#- % a s#ee +a#e a' M%-/.en"* /' C0r%*$"* ' T$#an$"* d. Carbon &B' In *a% we.$n, w0$0 +ara*e#ers $2e #0e rea#es# %n#r% % we. a++earane ."r$n .$+ #ranser %r s0%r# $r"$#$n we.$n7 a' W$re s#$9<%"# en#0 /' A*+erae ' W$re ee. s+ee. d. Inductance &&' In MMA we.$n, #0e sa +r%."e. an /e 2ar$e. #% s"$# #0e we.$n +%s$#$%nK w0$0 #-+e % sa w%". /e re!"$re. %r we.$n $n #0e H +%s$#$%n7 a' "$. /' $s%"s c. :one of the above .' Se*$ ;"$. &' T0e we. *e#a .e+%s$# % *an"a *e#a ar ee#r%.es a0$e2es $#s *e0an$a s#ren#0 #0r%"07 a' T0e %re w$re b. The ux coating ' Ir%n +%w.ers w$#0 #0e ;" %a#$n &8' W0a# %ns#$#"en# $s nee.e. $n a %a#$n % an ee#r%.e #% +re2en# #0e %r*a#$%n % +%r%s$#- $n we.$n % a r$**$n s#ee7 a' Ir%n +%w.ers /' Ca$"* ;"%r$.e c. !ilicon .' Ca$"* ar/%na#e &4' We.s *a.e w$#0 0$0 0ea# $n+"#s s0%w a re."#$%n $n %ne % #0e %%w$n +r%+er#$es7 a' D"#$$#b. Toughness ' a#$"e s#ren#0 .' Me0an$a s#ren#0 &5' In #0e we.$n % a"s#en$#$ +$+e w%r9, #0e /%re $s "s"a- +"re. w$#0 Ar%n #% 7 a' Pre2en# %r*a#$%n % +%r%s$#- $n #0e we. /' Pre2en# /"rn<#0r%"0 $n #0e r%%# r"n c. Prevent oxidation of the root beat .' E$*$na#e #0e %r*a#$%n % H &>' In
b. Been heat+treated ' =een !"a$#- #es#e. .' =een 2a""* *e#e. &@' W0$0 %ne % #0e %%w$n #-+e % s#ees w%". $2e r$se #% #0e %r*a#$%n % +%r%s$#- w0en a"#%en%"s- we.e. w$#0 an ar +r%ess7 a' "- 9$e. s#ee /' Se*$ 9$e. s#ee c. "imming steel .' $ne ra$ne. s#ee &' In s"/*ere. ar we.$n, #0e "se % eess$2e- 0$0 2%#ae w%". res"# $n7 a' Ins"$en# ;" *e#$n b. *xcessive ux melting ' Sa re*%2a .$"#$es .' S+a##er B' T0e "se % e"%se ee#r%.es $s %#en *a.e w0en we.$n #0e r%%# +ass % +$+es $n #0e 6e.' T0$s $s /ea"se7 a' H-.r%en %n#r% $s nee.e. /' Ir%n +%w.ers $n #0e ee#r%.e d. #igher arc voltage can be obtained e' S0%r#er ar en#0 an /e a0$e2e. &' In #0e we.$n % a"s#en$#$ s#a$ness s#ees, #0e ee#r%.e an. #0e +a#e *a#er$a an /e +"r0ase. w$#0 %w ar/%n %n#en#s' T0e seas%n %r #0$s $s #% +re2en#7 a' Cra9$n #0e HAF b. The formation of chromium carbides ' Cra9$n #0e we. *e#a .' D$s#%r#$%n
' S"/*ere. ar ;"es an /e s"++$e. $n #w% %r*sK #0ese are7 a' S$n#ere. an. a$#a#e. /' A$#a#e. an. "se. ' Cr"s0e. an. a%*era#e. d. ;used and agglomerated 8' In #0e s#ee w0$0 0as $*+r%2e. ree+ +r%+er#$es a# ee2a#e. #e*, w0$0 %ne % #0e %%w$n ee*en#s 0e+s $n #0$s $*+r%2e*en#7 a' T"ns#en /' Mananese c. &olybdenum .' Car/%n 4'We.$n a s#ee +a#e % a CE % '45 w%". re!"$re +re0ea#$n #% 7 a' Pre2en# #0e %r*a#$%n % s"+0$.es b. Prevent hardening in the #A' ' Pre2en# #0e %r*a#$%n % ar/$.es .' T% $*+r%2e *e0an$a +r%+er#$es $n #0e we. 5' W0$0 % #0e %%w$n +r%esses "ses #0e EHOLING s-s#e* % "s$%n7 a' r$#$%n we.$n /' D$3"s$%n /%n.$n 26
c. *lectron beam $elding .' A"#%en%"s- TIG we.$n >' In r$#$%n we.$n, $s #0e *e#a a# #0e $n#erae $n #0e7 a' $!"$. s#a#e /' S%$. s#a#e c. Plastic state .' Eas#$ s#a#e ?' We.$n +r%e."res *a- re!"$re we.s #% /e .e+%s$#e. a# a %n#r%e. ra#e 0ea# $n+"#' H$0 0ea# $n+"# w%".7 a' Ha2e +%%r +r%6e /' Ha2e arer ra$n s$:e ' Ha2e 0$0 0ar.ness $n #0e HAF .' Ha2e %w e%na#$%n +r%+er#$es @' In a #ens$e #es#, a /r$##e *a#er$a w%". /e $n.$a#e. $ #0e ra#"re s"rae7 a' S0%ws a re."#$%n $n s$:e b. Is at and featureless ' =rea9s $n #0e we. *e#a .' =rea9s $n #0e +aren# *e#a ' W0a# .es#r"#$2e #es# w%". /e re!"$re. #% aser#a$n #0e $9e$0%%. % ra9$n $n #0e HAF % a we.7 a' N$9 /rea9 /' S$.e /en. #es# ' C0ar+- $*+a# d. &arco test 8B' In s"/*ere. ar we.$n, eess$2e ar 2%#ae *a- a"se7 a' Eess$2e +ene#ra#$%n b. Change in $eld metal composition ' Narr%w we. w$.#0 .' Eess$2e /ea. +r%6e
WELDING INSPECTION, STEELS< WIS 5 MULTI CHOICE QUESTION PAPER (MSR
a' ar .e2$a#$%n /' ar *$sa$n*en# c. arc blo$ .' s#ra- ar 4' a ra9 #-+e *%s# ass%$a#e. w$#0 #0e s"/*ere. ar we.$n +r%ess $s 1 a' 0-.r%en ra9$n $n #0e HAF b. solidi(cation crac%ing ' a*ear #ear$n .' a#$"e ra9$n 5' w0$0 % #0e %%w$n +r%esses %$n#s *e#as +as#$aa. friction $elding /' res$s#ane we.$n ' ar we.$n .' +as*a we.$n e' a % #0e a/%2e
>' w0a# #-+e % +%wer s%"re 0ara#er$s#$ $s re!"$re. %r a *an"a +r%ess 7 a' %ns#an# 2%#ae /' ;a# 0ara#er$s#$ c. drooping characteristic .' n%ne % #0e a/%2e ?' w0$0 % #0e %%w$n ee#r%.es an. "rren# #-+e *a- /e "se. %r #0e TIG we.$n % n$9e an. $#s a%-s 7 a. cerium electrode DC ? ve /' :$r%n$"* ee#r%.e, AC ' #0%r$"* ee#r%.e, DC 2e .' a % #0e a/%2e *a- /e "se. @' w0a# are #0e +%ss$/e res"#s % 0a2$n a 0ea# $n+"# #% %w 7 a' an $nrease $n 0ar.ness, %wer -$e. s#ren#0 an. a9 % "s$%n /' a re."#$%n $n #%"0ness , 0-.r%en en#ra+*en# an. an $nrease $n 0ar.ness c. entrapped hydrogen an increase in hardness and lac% of fusion .' en#ra++e. 0-.r%en, a re."#$%n $n ar/%n %n#en# an. a9 % "s$%n ' #0e *a$n reas%n %r "s$n a /a9 +"re w0en we.$n &@<@ s#a$ness s#ee w$#0 #0e TIG we.$n +r%ess $s #% 1 a' $*+r%2e +%s$#$%na we.$n /' +re2en# #0e +%ss$/$$#- % +%r%s$#' +re2en# eess$2e r%%# +ene#ra#$%n d. prevent the formation of a dense oxide layer forming in the root &B' #0e +%ss$/e e3e#s % 0a2$n a #ra2e s+ee. #%% as# 1 a' %w #%"0ness, sa $n"s$%ns an. a+ "n.er"# b. high toughness slag inclusions and a narro$ thin $eld bead ' 0$0 0ar.ness, eess$2e .e+%s$#$%n an. %. a+s .' %w #%"0ness, +%%r "s$%n an. sa $n"s$%ns &&' $ ar /%w e$s#s w0en we.$n w$#0 #0e MMA we.$n +r%ess, #0$s an /e /es# re."e. %r e$*$na#e. /- 1 a' a 0ane r%* AC #% DC "rren# b. a change from DC to AC current 28
' a 0ane r%* DC 2e #% DC – 2e .' a 0ane r%* DC < 2e #% DC 2e &' w0en we.$n a .%"/e< /"## we. w$#0 #0e s"/*ere. ar we.$n +r%ess #0e +resene % en#er $ne +%r%s$#- *a- /e ."e #% 1 a' .a*+ ;" /' %n#a*$na#$%n %n #0e we. +re+ara#$%ns ' $n%rre# ;" .e+#0 d. all of the above &8' #0e $n"s$%n % an $n."#ane $n #0e we.$n $r"$# w0en "s$n MIGMAG we.$n +r%ess $s #% K a. control the rate of patter in the dip transfer mode /' $# ena/es #0e we.er #% we. $n +%s$#$%n w$#0 #0e s+ra- #ranser *%.e ' $# a%w %r #0$9er 6e# w$res #% /e "se. ( '><8'> ** .$a*e#er ) .' $# a%w " %n#r% %2er .r%+e# s$:e $n #0e s+ra- #ranser *%.e &4' an "n.es$ra/e +r%+er#- % a"*$n"* %$.e res$."e, w0en we.$n $s #0a# $# 1 a' .erease we. +%% ;"$.$#b. re)uire more heat to melt it $hen compared to aluminum ' a"se #0e we.er #% #ra2e #% !"$9.' #0e +resene % #0e %$.e *a9es a"*$n"* $*+%ss$/e #% we. &5' w0$0 % #0e %%w$n we.$n +r%ess $s *%s# $9e- #% /e "se. %r #0e we.$n % a s*a .$a*e#er s#a$ness s#ee +$+e, >** – wa #0$9ness 7 a. 9TA /' SMAW ' GMAW .' S"/*ere. ar we.$n &>' w0en %ns$.er$n #0e #"ns#en ar we.$n +r%ess w0a# $s #0e +"r+%se % #0e .%wn
' a "rren#, w0$0 re*a$ns a*%s# %ns#an# e2en $ as "s"a #0e we.er, 2ar$es #0e ar a+ d. a and b e' a % #0e a/%2e B' ' w0$0 % #0e %%w$n we.$n +r%ess, a#er #0e we. $s %*+e#e. n%r*a- re!"$re a +%s# we. 0ea# #rea#*en# #% res#%re #%"0ness 2a"es a' ESW /' MMA ' MAG d. All completed $elds re)uire a post heat treatment regardless of $elding process &' ' w0$0 % #0e %%w$n "rren# #-+es w%". -%" e+e# #% /e "se. %r #0e we.$n % a"*$n"* w$#0 #0e TIG we.$n +r%ess a' DC –2e /' DC 2e c. AC .' A % #0e a/%2e ' ' w0$0 % #0e %%w$n s#a#e*en# $s ase 7 a' $n #0e MMA we.$n +r%ess ee#r%.e DC +r%."es a .ee+ narr%w we. +%%, w0$0 $s as# ree:$n /' DC ee#r%.e +%s$#$2e $s "se. %r #0e MAG we.$n % s#ee +a#e ' T0e w%r. a$"* ar/%na#e *eans $*es#%ne d. All of the above 8' w0en %ns$.er$n 0-.r%en, w0$0 % #0e %%w$n we.$n +r%ess w%". +r%."e #0e %wes# e2es $n #0e %*+e#e. we. ( "n.er %n#r%e. %n.$#$%ns ) a' MMA /' SAW c. TI9 .' CAW 4' +re<0ea# +r$%r #% #0e we.$n % ar/%n s#ee /"## we. 1 a' *"s# awa-s #% arr$e. %"# /' $s awa-s arr$e. %"# "s$n a as ;a*e ' nee. n%# /e arr$e. %"# $ +%s# we. 0ea# #rea#*en# $ #% %%w d. none of the above 5' $n s#ee #0e ee*en# w$#0 #0e rea#es# e3e# %n 0ar.ness $s a' 0r%*$"* /' *ananese c. carbon .' n$9e >' %r a $2en 2%#ae an. "rren# se##$ns %n a MMA we.$n +an#, w0en #0e ar en#0 $s s0%r#ene., w0$0 % #0e %%w$n w$ /e *%s# a3e#e. a. the current $ill increase /' #0e "rren# w$ .erease ' #0e 2%#ae w$ .erease .' #0e 2%#ae w$ $nrease ? w0$0 % #0e %%w$n /es# .esr$/es a se*$
b.
the $elder is responsible for travel speed only arc gap is %ept constant by the $elding plant c. /%#0 #ra2e s+ee. an. ar a+ $s %n#r%e. /- #0e we.$n +a#e d. a % #0e a/%2e @' w0a# $s +"r+%se % a re#$6er $n a we.$n sa#es ee#r$a $r"$# 7 a' #% 9ee+ #0e ar s#a/e w0en "s$n %w "rren# se##$ns b. to convert AC current to DC current ' #% %n2er# DC "rren# #% AC "rren# .' #% $n$#$a#e #0e ar a# s#ar# "+ ' w0en a$/ra#$n a *e0an$:e. MAG we.$n +an#, w0$0 % #0e %%w$n a++$es (WS w$re ee. s+ee.) 7 a' 0e9 – WS, "rren#, 2%#s an. w$re .$a*e#er /' 0e9 – WS , %$n# se# "+, as ;%w ra#e an. WS c. chec% ? gas o$ rate stic% out length ;! and current .' a % #0e a/%2e 8B' #0e *a$n "sae % #0e ar a$r +r%ess $s 1 a' #0e "##$n % we. +re+ara#$%n b. the removal of defective $elds ' %r #0e "##$n % n%n<err%"s *a#er$as %n.' %r #0e "##$n % err%"s *a#er$as %n-
INAL ASSESMENT MULTIPLE
' %r #0e ar a$r ar/%n "##$n +r%ess #0e a$r $s a' Use %r %%$n #0e ee#r%.e %n' +r%."e. #0r%"0 #0e 0e*$a rea#$%n % #0e ee#r%.e an. #0e /ase *e#a .' s"++$e. #0r%"0 a$r +%r#s $n #0e ee#r%.e 0%.er an. .$re#e. a%n #0e ee#r%.e e' s"++$e. /- an%#0er #%r0 as% /- %#0er %+era#%r 8' ae#-ene 0%ses are .$s#$n#- .$3erene r%* %-en 0%ses' W0- 7 a' /ea"se #0e $n#erna .$a*e#ers % #0e #w% are .$3eren#' /' /ea"se % %+era#$n +ress"re .$3erenes /e#ween "e as an. %-en ' ae#-ene a##a9s #0e *a#er$as "se. $n %-en 0%ses 31
.' #% +re2en# a$.en#a $n#er0ane 4' w0$0 % #0e %%w$n an res"# $n a 0ar. an. /r$##e %n.$#$%n res"#$n r%* ra+$. %%$n a' ar s#r$9es /' eess$2e we. re$n%re*en# .' eess$2e s+a##er e' sa $n"s$%n 5' DC nea#$2e w0en "se %r MIG MAG an $2e #0e s*%%#0 ar a' #r"e /' ase >' $n w0$0 % #0e %%w$n +r%ess $s #0e "se % +ress"re re!"$re. #% s"ess"- %$n# #0e *a#er$as1 a' TIG /' MMA ' SAW .' S#". we.$n ?' w0$0 % #0e %%w$n w$ %n#r$/"#e s$n$6an#- #% a9 % "s$%n a' $n%rre# %$n# .es$n /' $n%rre# we.$n #e0n$!"e ' 0ea2- sae %n #0e %$n# s"rae .' a % #0e a/%2e @' w0$0 % #0e %%w$n +r%ess "se. %%se ran"ar ;" a' CAW /' SAW ' GTAW .' SMAW ' Cra9 T$+ O+en D$s+ae*en# #es# $s "se. #% *eas"re a' s#ren#0 % #0e *a#er$a /e$n #es#e. /' 0ar.ness % #0e *a#er$a ' #0e #%"0ness % #0e *a#er$as, res$s#ane #% ra9 e#ens$%n an. #0e ae+#a/e ;aw s$:e a .' ."#$$#- % #0e *a#er$a /e$n #es#e. &B' T0e +"se. MIGMAG *%.e % #ranser $s a 2ar$a#$%n % a s+ra- #ranser *%.e #0a# *a9e "se. % a %w /a9r%"n. "rren# w$#0 a 0$0er, ra+$.+"s$n "rren# s"+er$*+%se. %n $# a' ase /' #r"e &&' #0e $r%n ar/%n .$ara* $s "se. /- *e#a"r$s#s an. %#0er #% see 0%w a' a..$n n$9e 0anes #0e %rr%s$%n res$s#ane % s#ees /' a..$n ar/%n 0anes #0e res+%nse % #0e s#ee #e* 0anes ' a..$n *%-/.en"* $nreases #0e #%"0ness % s#ee .' a..$n 0r%*$"* $*+r%2e %rr%s$2e res$s#ane &' #0e *a$n +"r+%se % a .e2e%+er $s #% 1 a' ass$s# $n #0e .e2e%+*en# % #0e #es# +r%e."re /' +r%2$.e a ean s"rae %r #0e +ene#ra#e $n.$a#$%n ' ass$s# $n #0e .e2e%+*en# % #0e +ene#ra#e $n.$a#$%n r%* a .ee# .' ass$s# $n #0e .r-$n % #0e +ene#ra#e &8' %2era+ $n a 6e# we. w%". %"r1 a' a# s%*e +%$n# $n #0e we. #0r%a# 32
/' %n- %n #0e ae % #0e we. .' a# #0e #%e % #0e we. e' a# #0e r%%# % #0e we. &4' $n #0e TIG we.$n +r%ess, as s0$e.$n % #0e we. +%% *a-/e +r%2$.e. /- w0$0 as' a' ar/%n .$%$.e /' ar%n an. %-en .' ar%n an. 0e$"* e' %-en an. 0e$"* &5' we.$n ;" 1 a' 0e+s %n %n#r% #0e #e* % #0e +$ees /e$n we.e. /' ra#es a #e*+%rar- /%n. /e#ween #0e +$ees /e$n we.e. .' +r%#e#s r%* #0e a#*%s+0ere an. re*%2es #0e %$.e 6* %n #0e s"rae ' *a9es $# eas$er #% *%2e #0e ee#r%.e &>' $nreas$n #0e ar/%n %n#en# % s#ee a%ws a $2en e2e % 0ar.ness #% /e a0$e2e. 1 a' a# a 0$0er %%$n ra#e /' w$#0%"# %ns$.era#$%n % #0e %%$n ra#e ' w$#0%"# a..$n 0r%*$"* #% #0e s#ee .' a# a %wer %%$n ra#e &?' w0$0 $s n%# a a#%r #0a# s0%". /e %ns$.ere. $n see#$n #0e /es# s0$e.$n as *$#"re %r a $2en a++$a#$%n 1 a' we. a++earane an. ae+#a/e s+a##er e2e /' #0$9ness %$n# .es$n an. +ene#ra#$%n re!"$re*en#s ' #0e we.ers +ers%na re!"$re*en# .' #ranser *%.e &@' w0$0 % #0e %%w$n $s n%# %ns$.ere. #% /e a"se % $n%*+e#e "s$%n a' we.$n "rren# eee.$n #0a# s+e$6e. %n a WPS /' "s$n #%% are an ee#r%.e %r a narr%w ee ' $*+r%+er *an$+"a#$%n % #0e ee#r%.e .' "s$n #0e wr%n #-+e % ee#r%.e &' w0$0 $s an a.2an#ae % an ar%n 0-.r%en as *$#"re $n TIG % s#a$ness s#ee a' %wer 0ea# $n+"# /' $*+r%2e. #%"0ness ' as#er #ra2e s+ee. .' $*+r%2e. *e0an$a +r%+er#$es B' s%*e MMA ee#r%.es %r #0e we.$n % s#a$ness s#ee 0a2e a %w ar/%n s#ee %re w$re an. #0e a%-$n ee*en#s $n #0e %2er$n' T0$s $s /ea"se 1 a' #0e %re w$re %3er %wer res$s#ane #% #0e +assae % #0e we.$n "rren# /' #0e *an"a#"rer an *%re %n2en$en#- $n".e a%-$n ee*en#s $n #0e %2er$n #0an +r%."e s+e$a %re w$res ' /%#0 %r reas%n a an. / a/%2e .' %r s%*e reas%n n%# $s#e. a/%2e &' s"+0"r $s s%*e#$*es a..e. #% s#ee #% $*+r%2e a' #0e $*+a# +r%+er#$es % #0e we.e. %$n# /' +r%2$.e 0$0er $*+"r$#$es e2es 33
' #%"0ness % #0e +aren# *a#er$as .' *a0$n$n +r%+er#$es 0ara#er$s#$s % #0e s#ee ' s%w %%$n % $!"$. *e#a r%* 0$0 #e* +r%*%#es #0e r%w#0 % a' *e.$"* ra$ns /' are ra$ns ' s*a ra$ns .' a %*/$na#$%ns % are an. s*a ra$n 8' a .ee# an /es# /e .esr$/e. as K a' a #-+e % ;aw $n a we. rear.ess % s$:e /' *ean$n ea#- #0e sa*e #0$n as a .$s%n#$n"$#' an- #-+e % we. ;aw .' a .$s%n#$n"$#- ".e. #% +%ss$/$$#- $n#erere w$#0 #0e 6# %r +"r+%se % #0e we. 4' ACC ( Dr%%+$n ar ) +%wer s%"re $s s"$#a/e %r a' MMA
' w0en we.$n w$#0 a wea2e #e0n$!"e #0e 0ea# $n+"# "s$n #0e sa*e we.$n +ara*e#ers( a*+s an. 2%#s ) as #0%se "se. %r s#r$ner /ea. w$ /e a' %wer #0an #0a# %r #0e s#r$ner /ea. /' "na3e#e. /ea"se #e0n$!"es 0as n% $n;"ene %n #0e 0ea# $n+"# ' w$ #0e 0$0er #0an #0e s#r$ner /ea. /ea"se #0e #ra2e s+ee. w$$ /e %wer .' #0e sa*e as #0a# %r #0e s#r$ner /ea. ?' we.$n $n %. wea#0er %n.$#$%ns $s *%s#- %**%n- ass%$a#e. w$#0 $nrease. r$s9 % a' "n.er"# /' +%r%s$#' sa $n"s$%n .' ra9$n @' 0-.r%en #ra++e. $n #0e we.*en# an a"se 0-.r%en ra9$n $ #0e %n#en#s % 0-.r%en are #%% 0$0' W0a# $s #0e %#0er na*e %**%n- "se. #% .esr$/e 0-.r%en ra9$n7 a' 6ss"re ra9s /' 0%# ra9s ' s"+err$#$a ra9s .' %. ra9s ' s#ee $s %#en 0ea# #rea#e. a#er $# $s *a.e a# #0e s#ee *$' W0en a s#ee $s n%r*a$:e. w0a# $s #0e +r$*ar- %/e#$2e % #0$s +r%ess 7 a' #% $nrease #0e 0ar.ness /' #% .erease #0e a*%"n# % ar/%n $n #0e s#ee 34
' #% $nrease #0e %w #e* #%"0ness % a s#ee .' #% $*+r%2e #0e #ens$e s#ren#0 8B' #ra2e s+ee. $s #0e ra#e a# w0$0 #0e we.$n "n +r%ress a%n #0e %$n#' As #0e #ra2e s+ee. $nreases 1 a' #0e +ene#ra#$%n $s $nrease. /' #0e 0ea# $n+"# $n#% #0e %$n# .erease. an. #0e +ene#ra#$%n $s .erease. ' #0e +ene#ra#$%n $s .erease. an. #0e we. /ea. /e%*es 0$0er an. w$.er .' #0e 0ea# $n+"# $n#% #0e %$n# $s $nrease. 8&' #0e re%**en.e. .r-$n #e* an. #$*e re!"$re. +r%."$n a %n.$#$%n /e%w 5 * H&BB ra*s % we. *e#a w0en "s$n /as$ ee#r%.es w%". /e 1 a' /e%w &5B% %r & 0%"r /' 5B% %r & 0%"r ' %2er 85B %r & 0%"r .' >BB %r & 0%"r
M – OO &' W0- $s #0e enera- %%. +ra#$e #% a$* a# "s$n #0e eas# a*%"n# % %ns"*a/e *a#er$as an. 9ee+ %$n# +re+ara#$%ns #% a *$n$*"*7 a' #% $nrease /ene6$a res$."a s#resses /' $*+r%2e. s#ren#0 ' s*aer we.s enera- %%9 /e##er .' #% re."e %s#s an. w$#0 ess we. *a#e #0ere $s #0e +r%+ a/$$#- % ewer we. a"#s ' $n enera, #0e MIGMAG *%.e % #ranser /es# s"$#e. %r #0e we.$n #0$n s0ee# $s 1 a' s0%r#< $r"$#$n #ranser /' %/"ar #ranser ' s+ra- #ranser .' s0%". n%# "se MIG7MAG %r we.$n #0$n s0ee# 8' $n enera' T0e MIGMAG *%.e #ranser /es# s"$#e. %r we.$n #0$n s0ee# $s .$+ #ranser a' #r"e /' ase 4' w0$0 % #0e %%w$n *a-/e .$"# #% .e#e# w$#0 #0e ra.$%ra+0$ $ns+e#$%n *e#0%.7 a' $n%*+e#e +ene#ra#$%n /' .$s%n#$n"$#$es +en.$"ar #% #0e ra.$a#$%n /ea* ' sa $n"s$%n .' +%r%s$#5' T0e +"se. – MIGMAG +r%ess $s %n- s"$#a/e %r we.$n $n #0e ;a# +%s$#$%n a' Tr"e /' ase
35
>' W0en "s$n Gas Me#a Ar We.$n ( GMAW ) +r%ess, s#ra$0# ar%n *a- /e s"ess"- "se. as a s0$e.e. as w0en we.$n #0e %%w$n a' s#ee %r a"*$n"* /' A"*$n"* ' S#ra$0# ar%n $s ne2er "se. .' S#ee ?' T0e +r$*ar- a.2an#ae % a ?5J Ar,5J % as *$#"re %2er +"re % $n #0e CAW +r%ess $s 1 a' $nrease $n we.$n s+ee.s /' 2er- s$n$6an# re."#$%n $n we. s+a##er ' $nrease #0e 0ea# $n+"# .' .erease $n we.$n s+ee.s @' A a"se % $na.e!"a#e +ene#ra#$%n %". 1 a' In%rre# %$n# +re+ara#$%n /' In%rre# %$n# .es$n ' In%rre# we.$n #e0n$!"e .' A % #0e answer +r%2$.e. are +%ss$/e a"se ' w0$0 % #0e %%w$n $s n%# a *e#0%. % $nreas$n #0e 0ar.ness % a s#ee 7 a' 0ea# #rea#*en# /' as#$n ' *e0an$a .e%r*a#$%n .' $n#r%."$n a%-$n ee*en#s &B' we.$n 0anes #0e +r%+er#$es % s%$. s#ee #0r%"0 K a' *e0an$a 0anes a"se. /- r%$n /' 0an$n #0e 6na a++earane % #0e s#ee ' 0ea#$n an. %%$n -es ass%$a#e. w$#0 #0e we.$n ar an. we. *e#a .e+%s$# .' *e#a"r$a e3e#s as a res"#s % *$r%ra+0s &&' #ens$%n #es# res"#s are "se. 1 a' s%"n.ness % #0e *a#er$as /e$n #es#e. /' #% see# *a#er$a %r en$neer$n a++$a#$%ns ' ra#"re #%"0ness % #0e *a#er$as /e$n #es#e. .' a#$"e a+a/$$#- % #0e *a#er$a /e$n #es#e. &' w0$0 % #0e %%w$n *a- %n#r$/"#e #% #0e %r*a#$%n % +%r%s$#- $n #0e we. .e+%s$# 1 a' a % #0e answer +r%2$.e. $s a %n#r$/"#$n a#%r /' %w we.$n "rren# ' %n#a*$na#$%n % #0e we. %$n# s"raes .' "se % %n#a*$na#e. ee#r%.es
&8' W0en "s$n #0e GMAW +r%ess %r #0e we.$n % a"*$n$"*, #0e $ner s0%". *a.e % 1 a' N-%n /' Gra+0$#e ' S#ee .' A $ner s0%". n%# /e "se. &4' W0en +re+ar$n /en. #es# s+e$*ens $# $s $*+%r#an# #% 1 36
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