Dokumen - Tips Cswip 31 Exam Ans [PDF]

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8/10/2019

CSWIP 3.1 EXAM & ANS

SPECIMEN WRITTEN EXAMINATION QUESTIONS CSWIP 3.1 1.1

Part A and Part A2 Candidates are required to tick, or otherwise indicate, the corrective answer in the section provided. There is onl one correct answer !or each question. 1

Applin" preheat when weldin" car#on $an"anese steel is nor$all done to avoid% a& Sla" inclusions  #& 'dro"en crackin" c& (ack o! sidewall !usion d& Porosit

2

Which o! !ollowin" $echanical properties o! a weld in car#on $an"anese steel is $ost a!!ected i! the heat input per unit len"th o! weld is e)cessivel hi"h* a&  #& c& d&

3

ou o#serve centerline crackin" a weld that as #een $ade one o! !ive work stations each $akin" si$ilar co$ponents. The !irst action to take is% a&  #& c& d&

0



+lon"ation Tensile stren"th 'ardness Tou"hness

I$pound all weldin" consu$a#les -eport the occurrence to hi"h authorit Stop all weldin" Call !or !ull /T checks

Which o! the !ollowin" de!ects is unlikel to #e !ound # visual inspection. a&  #& c&

(inear $isali"n$ent ndercut verlap

d&

(inear sla" inclusion

Which o! the !ollowin" weldin" processes uses a resisitive heatin" sste$ to achieve weld $etal deposition. a&  #& c& d&

4anual $etal arc weldin" Su#$er"ed5arc weldin" +lectro sla" weldin" -esistance spot weldin"  Page 1 of 32

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6

9

Which o! the !ollowin" units could Charp 7 notch ener" #e $easured in* a&  #&

Pounds per square inch 8oules

c& d&

ewtons pera#ove square $illi$eter  one o! the

The usual $ethod o! assessin" the sensitivit o! radio"raph is # $eans o!  a% a&  #& c& d&

=

nder nor$al contract conditions, weld procedure approval tests !or pipe work are% a&  #& c& d&

?

@end test 4acro e)a$ination I$pact tests :racture tests

'dro"en controlled electrodes were developed principall !or% a&  #& c& d&

11

4andator /epend upon site and weather conditions /ependent upon the contractor>s con!idence in his procedures nl required when C2 weldin" is to #e used.

Which o! the !ollowin" destructive tests is not nor$all required !or  welder approval test !or $ild steel* a&  #& c& d&

1

/osi$eter :luoroscope I;I < Penetra$eter& Clino$eter  

The prevention o! porosit The prevention o! crackin" The enhance$ent o! arc volta"e Their ease o! arc startin"

:or which o! the !ollowin" is pre5heatin" $ost likel to #e required* a&  #& c& d&

Austenitic stainless steels 'i"h stren"th allo steels (ow and $ediu$ stren"th steels (ow car#on steels

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12

13

4anual $etal arc weldin" o! low allo steels is $ore likel to #e  per!or$ed with% a&

-utile electrodes

 #& c& d&

Cellulosic +lectrodes Iron powder electrodes @asic hdro"en controlled electrodes

which o! the !ollowin" de!ects is $ore co$$on to weld deposited # the C52 weldin" process than weld deposited # $anual $etal arc* a&  #& c& d&

10

Which de!ect would ou e)pect to o#tain in TIB welds in non5deo)idied steel* a&  #& c& d&

1

nder cut Porosit Tun"sten inclusions (inear $isali"n$ent

Which o! the !ollowin" can arise !ro$ copper inclusions is a !errite steel weld* a&  #& c& d&

16

Sla" inclusion +)cess penetration (ack o! side !usion Tun"sten inclusions

Weld $etal cracks 'AD cracks (a$ellar tearin" Porosit

Which o! the !ollowin" is likel to "ive the hi"hest i$pact stren"th in !erritic weld $etal* a&  #& c& d&

Cellulosic electrodes Su#$er"ed arc with acid !lu) Spra trans!er Co525weldin" @asic coated nor$al $etal arc electrodes

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19

1=

Which o! the !ollowin" $ethods o! /T would #e $ost likel to detect lack o! side !usion in !erritic steel welds* a&  #&

Penetrants 4a"netic particles

c& d&

-adio"raph ltrasonic !law detector  

ou suspected that !erritic steel plates, which have #een ed"e, prepared contain crack in the prepared ed"es. Which /T $ethod would ou use to check this* a&  #& c& d&

1?

Which o! the !ollowin" de!ects do ou not e)pect to !ind # visual e)a$ination o! co$pleted welds* a&  #& c& d&

2

In i$provin" resistance to stress corrosion crackin" In di$ensional sta#ilit a!ter $achinin" i$provin" In lowerin" the peak residual stress In so!tenin" the steel

What is the $a)i$u$ hardness usuall reco$$ended !or the 'AD o! a $ediu$ stren"th !erritic steel weld* a&  #& c& d&

22

(inear sla" inclusions nder cuts verlap (inear $isali"n$ent

Stress relie! is not help!ul in one o! the !ollowin" cases. Which one* a&  #& c& d&

21

-adio"raph 4a"netic particle Penetrants ltrasonic !law detector  

1 /P 'v 3 /P '7  /P 'v 9 /P 'v

What e!!ect to $idthickess la$ination in steel plate nor$al have when the are located within a weld 'AD* a&  #& c& d&

Cause la$ellar tearin" :use to"ether to !or$ a #ond A!!ect the weld $etal co$position Cause internal tearin" on a $icro5scale  Page 4 of 32

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23

20

When hdro"en control is speci!ied !or a $anual $etal arc5weldin"  proEect the electrode would nor$all #e% a&

Cellulosic

 #& c& d&

Iron Acido)ide @asic

ou would with certaint reco"nie a hdro"en controlled !lu) covered electrode !ro$ its% a&  #& c& d&

2

When $anual $etal arc weldin" is #ein" carried out on an open construction site, which "roups o! welder are $ost likel to require continuous $onitorin"* a&  #& c& d&

26

Concrete shutterin" weldin" tea$ Pipe welders Plater welders Plant $aintenance welders

ou noticed $anual $etal arc weldin" electrodes, stripe o! !lu), are #ein" used as !iller wire, !or TIB weldin". ou would o#Eect #ecause% a&  #& c& d&

29

Color (en"th Trade na$e AWSF@S63? Code (etter  

It is too e)pensive The wire would #e too thick  The weld $etal co$position $a #e wron" The wire is too short

When open site workin", serious porosit in $anual $etal arc weldin" is  #rou"ht to our attention. What would ou investi"ate* a&  #& c& d&

+lectrode tpe Power plant tpe +lectrode stora"e /a te$perature

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2=

The steel co$position in structural contract is chan"ed !or$ .1G car#on, .6G $an"anese, to .2G car#on, 1.2G $an"anese. 4i"ht this in!luence the incidence o!% a&

Porosit

 #& c& d&

Crackin" weld area nder cutin !orthe !illet welds (ack o! root !usion de!ects

2?

ne o! the !ollowin" allos is non5$a"netic, Which*

3

a&  #& c& d& When

0.G Chro$iu$ $ol#denu$ 12.G Chro$iu$ Austenitic Stainless Steel ?.G ickel Steel the TIB weldin" Austenitic Stainless Steel pipe. Ar"on "as #ackin"

is called !or. This is to% a&  #& c& d& 31

Pre5heatin" a car#on steel $anual $etal arc weldin" is carried out to $ini$ie the risk o!  a&  #& c& d&

32

Scattered porosit Wor$ hole porosit Parent $etal crackin" (ack o! penetration

I H practice, @S 0?? Part2 speci!ies that the drawin" di$ension quoted !or a !illet weld is the% a&  #& c&

33

Prevent o)idation Prevent under #ead crackin" Prevent porosit Control the penetration #ead shape

(e" len"th Actual throat thickness Weld width

:or open site $anual $etal arc weldin" the !ollowin" equip$ent is availa#le. Which would ou choose !or sa!e workin"* a&  #& c& d&

Sin"le operator trans!or$er  4ulti operator trans!or$ers ACF/C co$posite power unit /iesel en"ine driven $otor "enerator 

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30

3

I! su#$er"ed weldin" to #e used to $ake #utt welds, which would ou #e $ost critical o!% a&  #&

The root "ap tolerance The an"le o! penetration

c& d&

The !ace width The root "as cut !inish

/urin" C52 weldin", the arc len"th is $ost likel to #e a!!ected #% a&  #& c& d&

36

Pre heatin" !or arc weldin" applies to% a&  #& c& d&

36

The weld could #e hard and #rittle The weld $etal could #e too so!t There will #e no e!!ect on the weld The weld have under cut

A welder quali!ication test is o veri!% a&  #& c& d&

3=

Asse$#l weldin" onl Asse$#l and tack weldin" 8oint over 2 $$ thick onl Cruci!or$ welds onl

ou see a welder usin" o)5acetlene !la$e with alon" !eathered inner  cone. What would #e the e!!ect o! this on car#on steel* a&  #& c& d&

39

The wire dia$eter   The current return connections The "as !low rate The torch to work an"le

The skill o! the welder   The qualit o! the $aterials The non5destructive procedures The $anu!acturin" $ethods

A !a#ricatin" procedure calls !or !illet welds to #e #lended in # "rindin". This is to in!luence% a&  #& c& d&

'AD crackin" :ati"ue li!e -esidual stresses ield stren"th

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3?

0

@end test speci$ens have #een taken !ro$ a 2 $$ thick car#on steel #utt weld. Which would show lack o! inter5run !usion% a&  #&

Side #end -oot #end

c& d&

:ace #end Buided #end

(a$ellar tearin" has #een occurred in steel !a#rication. @+:-+ weldin" could it have #een !ound #% a&  #& c& d&

01

ou are to over see arc weldin" o! so$e $achine !ittin"s and !ind the are cad$iu$ plated. What ou% a&  #& c& d&

02

Per$it it to proceed Per$it it to proceed with !u$e e)traction Stop the operation at once Advise the welder to drink $ilk and proceed

What two !unctions in arc weldin" $ust #e in equili#riu$ to ena#le a sta#le arc to #e esta#lished* a&  #& c& d&

03

5ra e)a$ination /e penetrant ltrasonic inspection It would not have #een !ound # an inspection $ethod

Arc volta"e Current WireFelectrode !eed rate 4etal #urn5o!! rate

In 44A weldin", what para$eter is used !or the control penetration into the #ase $aterial* a&  #& c& d&

7olta"e Weldin" speed Iron powders in the coatin" Current

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00

0

In the weldin" o! #utt Eoint !ro$ one side, which o! the !ollowin" controls the pro!ile o! the root #ead* a&  #&

-oot :ace @evel An"le

c& d&

-oot Bap ne o! the a#ove

What tpe o! power source characteristic is required !or $anual weldin"* a&  #& c& d&

06

Constant volta"e :lat Characteristic /roopin" Characteristic 4otor Benerator  

Which o! the !ollowin" destructive tests would indicate the tou"hness o!  weld $etalFparent $etal J 'AD. a&  #& c& d&

09

/e"reasin" co$ponents are essential !or qualit weldin" #ut so$e a"ents $a% a&  #& c& d&

0=

Cause corrosion Pro#le$s Bive o!! Phos"ene Bas (eave -esidues All o! the A#ove

Which o! the !ollowin" che$ical ele$ents has the "reater e!!ect on the harden a#ilit o! a steel plate* a&  #& c& d&

0?

4acro ick #reak  'ardness Charp vee notch

4ol#denu$ Chro$iu$ Titaniu$ Car#on

In 4ABFC2 weldin", which para$eters "ive the "reatest control o! weld appearance durin" dip trans!ers or short5circuitin" weldin"* a&  #& c& d&

Wire sick5out len"th A$pera"e Wire !eed speed Inductance

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

1

2

In 44A weldin", the sla" produced can #e varied to suit the weldin"  positionK which tpe o! sla" would #e required !or weldin" in the '7  position* a&

:luid

 #& c& d&

7iscous one o! the a#ove Se$i !luid

The weld $etal deposits o! $anual $etal arc electrode achieves its $echanical stren"th throu"h* a&  #& c& What

The core wire The !lu) coatin" Iron powder with the !lu) coatin" constituent is needed in coatin" o! electrode o! an electrode to

 prevent !or$ation o! porosit in weldin" o! ri$$in" steel* a&  #& c& d& 3

Welds $ade with hi"h heat inputs show a reduction in one o! the !ollowin" properties* a&  #& c& d&

0

/uctilit Tou"hness :ati"ue stren"th 4echanical stren"th

In the weldin" o! Austenitic pipe work, the #orer is usuall pur"ed with Ar  to* a&  #& c& d&



Iron powder Calciu$ !luoride Silicon Calciu$ car#onate

Prevent !or$ation o! porosit in the weld Prevent #urn5throu"h in the root run Prevent o)idation o! the rood #ead +li$inate the !or$ation o! '2

In 5ra the qualit o! the radio"raph ne"ative is assessed # the* a&  #& c& d&

/ensit o! the :il$ I;I indicator  H7A availa#le Stand5o!! distance

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6

9

A steel descri#ed, as ;T will have i$proved tensile properties it has* a&  #& c&

'ad control o! che$ical co$position @een heat treated @een qualit tested

d&

@een vacuu$ $elted

Which one o the !ollowin" steels would "ive rise to the !or$ation o!   porosit when auto"enousl welded with an arc process* a&  #& c& d&

=

:ull killed steel Se$i killed steel -i$$in" steel :ine "rained steel

In su#$er"ed arc weldin", the use o! e)cessivel hi"h volta"e would result in* a&  #& c& d&

?

The use o! cellulosic electrode is o!ten $ade when weldin" the root pass o! pipes in the !ield. This is #ecause* a&  #& c& d&

6

'dro"en control is needed Iron powder in the electrode 'i"her arc volta"e can #e o#tained Shorter arc len"th can #e achieved

In the weldin" o! Austenitic stainless steels, the electrode and plate $aterial can #e purchased with low car#on contents. The reason !or this is to prevent* a&  #& c& d&

61

Insu!!icient !lu) $eltin" +)cessive !lu) $eltin" Sla" re$oval di!!iculties Spatter

Crackin" I the 'AD The !or$ation o! chro$iu$ car#ides Crackin" in the weld $etal /istortion

Su#$er"ed arc !lu)es can #e supplied in two !or$sK thses are* a&  #& c& d&

Sintered and a"itated A"itated and !used Crushed and a""lo$erated :used and a""lo$erated

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62

63

In a steel, which has i$proved creep properties at elevated te$perature, which one o! the !ollowin" ele$ents helps in this i$prove$ent* a&  #&

Tun"sten 4an"anese

c& d&

4ol#denu$ Car#on

Weldin" a steel plate o! C+ o! .0 would require preheatin" to* a&  #& c& d&

60

Which

Prevent the !or$ation o! sulphides Prevent hardenin" in the 'AD Prevent the !or$ation o! car#ides To i$prove $echanical properties in the weld o!

the

!ollowin"

processes

uses

the

Lkeholin"M

 sste$ o! !usion* a&  #& c& d& 6

In !riction weldin", is the $etal at the inter!ace in the* a&  #& c& d&

66

(iquid state Solid state Plastic state +lastic state

Weldin" procedures $a require welds to #e deposited at a controlled rate heat input. 'i"h heat inputs would* a&  #& c& d&

69

:riction weldin" /i!!usion #ondin" +lectron #ea$ weldin" Auto"enous TIB weldin"

'ave poor pro!ile 'ave lar"er "rain sie 'ave hi"h hardness in the 'AD 'ave low elon"ation properties

In a tensile test, a #rittle $aterial would #e indicated i! the !racture sur!ace* a&  #& c& d&

Shows reduction in sie Is !lat and !eatureless @reaks in the weld $etal @reaks in the parent $aterial

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6=

6?

What destructive test would #e required to ascertain the likelihood o!  crackin" in the 'AD o! a weld* a&  #&

ick #reak   Side #end test

c& d&

Charp input 4acro test

In su#$er"ed arc weldin", e)cessive arc volta"e $a cause* a&  #& c& d&

9

The @ritish code !or visual inspection require$ents is% a&  #& c& d&

91

@e!ore, durin" and a!ter weldin" activities @e!ore weldin" activities onl A!ter weldin" activities onl one o! the a#ove

Inco$plete penetration in a #utt Eoint could #e caused #% a&  #& c& d&

93

@S0=92 @S0?? @S0=9 one o! the a#ove

A code o! practice !or visual inspection should cover the !ollowin"% a&  #& c& d&

92

+)cessive penetration Chan"e in weld $etal co$position arrow weld width +)cessive #ead pro!ile

+)cessive root !ace width +)cessive root "ap sie (ow current settin" @oth A N C

Inco$plete root !usion weld certainl #e caused #% a&  #& c& d&

(inear $isali"n$ent Incorrect tilt an"le /i!!erin" root !ace widths All o! the a#ove

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90

9

When visuall inspectin" a co$pleted sin"le vee #utt weld cap ou would certainl assess% a&  #&

Cap hei"ht Toe #lend

c& d&

Weld width A, @ N C

ou notice a ver LveedM ripple shape. This is $ost likel caused #% a&  #& c& d&

96

LToe #lendin"M is i$portant as it $a a!!ect% a&  #& c& d&

99

4anual $etal arc 4etal inert "as Su#$er"ed arc weldin" @oth A N C

ndercut principall caused #% a&  #& c& d&

9?

Corrosion :ati"ue li!e verlap tpe de!ects All o! the a#ove

Sla" inclusion would occur with% a&  #& c& d&

9=

Poor consu$a#le choice Weldin" position +)cessive travel speed All o! the a#ove

+)cessive a$ps +)cessive volts +)cessive travel speed All o! the a#ove

ndercut nor$all assessed #% a&  #& c& d&

Its depth Its len"th Its #lendin" All o! the a#ove

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=

=1

A weldin" procedure is use!ul to% a&  #& c&

Bive in!or$ation to the welder  Bive in!or$ation to the inspector  Bive LCon!idenceM to a product

d&

All o! the a#ove

An essential varia#le $a% a&  #& c& d&

=2

A $a"ni!in" "lass $a #e used durin" visual inspection #ut @S 2=? states that its $a"ni!ication should #e% a&  #& c& d&

=2

=3

p to  φ  2 J 2. φ  J 1 φ one o! the a#ove

When visuall inspectin" a !illet weld, it would nor$all #e LsiedM #% a&  #& c&

The le" len"ths The actual throat thickness The desi"n throat thickness

d&

@oth A N C

The planar de!ect is% a&  #& c& d&

=0

Chan"e the properties o! the weld In!luence the visual accepta#ilit -equire re5approval o! a weld procedure All o! the a#ove

Inco$plete !usion de!ects Sla" inclusion Inco$plete penetration @oth A N C

Penetrant and 4a"netic particle inspection are $ainl used to% a&  #& c& d&

Aid visual inspection @ecause application standard sas so To con!ir$ Lvisual uncertaintiesM All o! the a#ove

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=

=6

/e!ects outside o! the li$its speci!ied in a standard should alwas #e% a&  #& c&

-epaired -eported to La senior personM Assessed alon" with other de!ects

d&

All o! the a#ove

4IB weldin" tends to #e suscepti#le to lack o! !usion pro#le$s. This is  #ecause o!% a&  #& c& d&

=9

Poor $aintenance o! equip$ent Incorrect settin" Poor inter run cleanin" All o! the a#ove

4anual $etal arc electrodes can #e "rouped into three $ain tpes. Thses are% a&  #& c& d&

==

The $ain causes o! porosit in welded Eoints are% a&  #& c& d&

=?  

Poor access (oss o! "as shield L/irtM $aterials All o! the a#ove

LWeave techniqueM $a "ive rise to% a&  #& c& d&

?

@asic cellulosic and rutile eutral cellulosic and rutile @asic cellulosic and neutral one o! the a#ove

@etter pro!iles I$proved toe #lendin" I$proved ripple shape All o! the a#ove

Cracks in welds $a #e due to% a&  #& c& d&

Solidi!ication pro#le$s 'dro"en pro#le$s +)cessive stresses All o! the a#ove

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CSWIP 3.1 EXAM & ANS

?1

With re!erence to a root penetration #ead, ou could certainl assess% a&  #& c&

-oot !usion and penetration -oot concavit @urn5throu"h

d&

All o! the a#ove

?2

A !ati"ue !ailure characteristic # the appearance o! the !racture sur!ace. It would #e% a& -ou"h and torn  #& LCheveronM J like c& S$ooth d& one o! the a#ove

?3

LStra arcin"M $a #e re"arded as a serious de!ect. This is #ecause% a&  #& c& d&

?0

verlap in welds could #e in!luenced #% a&  #& c& d&

?

Crackin" 4isali"n$ent pro#le$s Inclusions All o! the a#ove

4acroscopic e)a$ination requires an speci$en to #e inspected% a&  #& c& d&

?9

Poor weldin" technique Weldin" process Weldin" position All o! t he a#ove

:la$e cut preparations $a, durin" weldin", increase the likelihood o!% a&  #& c& d&

?6

It reduceliquation the thickness di$ension o! a co$ponent It $a $a cause cracks It $a cause hard ones All o! the a#ove

nce, a!ter etchin" Twice, #e!ore and a!ter etchin" sin" a $icroscope one o! the a#ove

Which o! the !ollowin" $a #e classes as a L$ore serious de!ectM% a&  #& c&

Sla" inclusions :usion de!ects