Questions and Answers 1.
Which type of submerged arc welding flux is susceptible to moisture pickup? Discuss o
A. Neu t r al
o
B. Agg l om er at ed
o
C. Fused
o
D. Ar e al lab outt hesa me
2.
A Large grain sie in the !A" of a #-$n %teel weld &oint may ha'e( o
A.
Low duc t i l i t y o
B. Lowt oug hne ss
o
C. Hi ght ou gh ne ss
o
D.
Hi gh t ensi l e st r engt h
).
A STRA test is used to measure the: o
A. Te nsi l e st r engt h of t he wel ded j oi nt
o
B. Leve l of r es i dual st r es si n but tj oi nt s
o
C. Fr ac t ur e o t ug hn essfo t heHAZ
o
D. Thr ought hi ck nessduct i l i t y of a st eel pl at e ( t he Z di r ect i on)
*.
The risk of hydrogen cracking is greater when MMA welding: o
A. CMn S t eel s
o
B. Aust eni t i c S t ai nl essSt eel s
o
C. Lo w Al l oySt ee l s F or El eva t edTe mper at ur e Servi ce
o
D. Lo w Car bo n S t ee l s Fo r Cr yog eni ca lSer vi ce
+.
The property of a material which has the greatest influence on welding distortion is its o
A. Yi el d st r engt h
o
B. Coe ffici en t oft he r malexp ansi on
o
C. El ast i c m odul us
o
D. Coeffici ent of t her mal co nduct i vi t y
,.
Which of the following is a suitable shielding gas for !AW of stainless steels" o
A. 100 % Ar gon
o
B. 70 % Ar go n +30 % He
o
C. Ar gon + 5% Hyd r ogen
o
D. Ar go n +20 % CO2
.
The presence of iron sulphides in a weld bead may cause:
o
A. Sol i di fic at i on crac ki ng
o
B. Hydr og encr acki ng
o
C. Lamel l ar t ear i ng
o
D. Wel d decay
.
A macrosection is particularly good for showing: o
A. Thewel d met alHAZ mi cr ost r uct ur e
o
B. Over l ap
o
C. Jo i ntha r dn ess
o
D. Spat t er
/.
Which of the following procedures would be e#pected to produce the least distortion in a $%mm straight butt weld" o
A.
TI G wel d, si ngl esi ded, mul t i pass o
B. MMA wel d, si ng l esi ded , mul t i pa ss
o
C. MMA wel d,do ub l esi ded , mul t i pa ss
o
D. SAW wel d,1 pa ss per si de
10.
A suitable gas&gas mi#ture' for (MAW for aluminium is: o
A. 100% CO 2
o
B. 100 % Ar gon
o
C. 80 % Ar go n+ 2 0% CO2
o
D. 98 % Ar go n +% 2 02
11.
Which of the following is associated with SAW more often than it is with MMA welds" o
A. Hydr og encr acki ngi n he t HAZ
o
B. Sol i di fic at i on cr ack i ng i nt he wel d met al
o
C. Reh ea t cr acki ng du r i ng WH PT
o
D. Lamel l ar t ear i ng
12.
)* +S, %-$. /0e1el !2 specifies that the limit for the diameter /D2 of a single pore in a weld is: D3456s' but ma#5 7mm where s8material thickness5 or which of the following situations is the pore acceptable" o
A. S=20m m,measur ed por e di am et er= 5m m
o
B. S=15 mm,measur ed por e di am et er= 4. 5m m
o
C. S=10m m,measur ed por e di am et er= 3m m
o
D. S=10 mm,measur ed por e di am et er= 3. 5m m
1).
To measure arc 1oltage accurately it is recommended that the 1oltmeter should be connected: o
A. Acr os s he t ar c a ndas n ear as p r ac t i ca lt ot he ar c
B.
o
Acros st he power so ur cet er mi nal s pr i or t o ar ci ni t i at i on
C.
o
Acr os s he t pow er so ur cet erm i nal s d ui r ng t he wel di ng ope r at i on
D.
o
Any wher ei nt he ci r cu i t 1*.
0amellar tearing has occurred in a steel fabrication5 What techni9ue could ha1e been used to find it before the weld was made" Discuss
o
A. Xr ayexa mi nat i on
o
B. Li qui d penet r ant ex ami nat i on
o
C. Ul t r aso ni c ex ami nat i on
o
D. I t co ud l no t ha ve ee bn f ou ndbyan y ns ipe ci t met on ho d
1+.
reheating a low alloy steel prior to welding to minimise the risk of: o
A. Por osi t y
o
B. Exc ess i vedi st or t i on
o
C. HAZ cr acki ng
o
D. Lackof f usi on
1,.
Typical temperature used for normalising a !;Mn steel plate are: o
A. 600-650ºC
o
B. 1000-1100ºC
o
C. 700-800ºC
o
D. 880-920ºC
1.
or (MAW the burn;off rate of the wire is directly related to: o
A. St i c k-o ut l engt h
o
B. Wi r ef ee d sp ee d
o
C. Ar c vo l t age
o
D. Tr ave lsp eed
1.
or MMA welding of a <4mm wall no==le to a $44mm wall 1essel shell' preheat temperatures should be checked: o
A. Bef or e wel di ng st ar t s/ r est ar t s
o
B. On t hesh el lan d no zzl e
o
C. At poi nt s a tl eas t 75mm f r om t he j oi nt edge
o
D. Al l of t he above
1/.
A crack running along the centreline of a weld bead could be caused by: o
A. Use of dam p flux
o
B. La ck of pr eh ea t
o
C.
Ar c v ol t age t oo hi gh o
D. Wel d b ea d oo t de epan d ver y nar r ow
20.
To impro1e resistance to ser1ice failure caused by cyclic loading' it is good practice to: o
A. Usel ow hea ti npu t wel di ng
o
B. Use ee st lwi t h al ow CEV
o
C. Ensu r et her e ar e no f eat ur es h t at gi vehi gh st r essco nce nt r at i on
o
D. PWHT t hef ab r i cat i on
21.
The use of low carbon austenitic stainless steels and stabiliser stainless steels will minimise the risk of: o
A. HAZ cr acki ng
o
B. Wel d decay
o
C. Wel d met alcr ac kng i
o
D. Di s t ort i on
22.
Which type of SAW flu# is susceptible to breaking down into fine particles during circulation" o
A. Fused
o
B. Neu t r al
o
C. Al l oye d
o
D. Agg l om er at ed
2).
The ma#imum hardness in the >A? of a steel will increase if the: o
A. Heat i nput i s n i cr ease d
o
B. CEV i s ncr i ea sed
o
C. Jo i nt t hi ck nessi s decr ease d
o
D.
Basi c e l ect r odes a r e us ed 2*.
@S )* +S, %-$. /0e1el @2 specifies the limit for e#cess weld metal /h2 on a butt weld as: h3$mm45$b' but ma#5 %mm' b8 weld width5 +n which of the following situations is the measured e#cess weld metal acceptable" A.
o
B = 10 easur m ed excess wel d m et al= 2. 5m m
B.
o
B = 20 easur m ed excess wel d m et al= 3. 5m m
C.
o
B = 35 easur m ed excess wel d m et al= 4. 5m m
D.
o
B = 45 easur m ed excess wel d m et al= 5. 5m m 2+.
A !;Mn steel is being welded by MMA and the electrode run;out lengths that ha1e been used are much shorter than specified by the WS5 This de1iation may gi1e: Discuss
o
A. I ncr ease dr i sk f ohyd r ogen cr acki ng
o
B. I ncrea se d r i skof so l i di fic at i on crac ki ng
o
C. Low erval ue s of HAZ t ou gh ne ss
D.
o
Hi gh erval ue s of HAZ ha r dn ess 2,.
The first procedure prepared for a Weld rocedure Qualification test is a: Discuss
o
A. PWPS
o
B. WPS
o
C. WPQR
o
D. WPAR
2.
Transfer of material identification by hard stamping is sometimes not allowed for high integrity applications because it: o
A. I st oo s l ow
o
B. Canbea sa f et y haza r d
o
C. May dam agehe t at mer i al
o
D. Cau se s p r ob l em s w i t h co ai t ngop er at i on s.
2.
When welding thin plate distortion can be minimised by: o
A. Wel di ngf r om bo t h si de s
o
B. Usi ng U pr epar at i ons a r t her t han Vt yp es
o
C. Usi ngst r on gb ac ks
o
D. Usi ng b ackst epwel di ng
2/.
Which of the following would be considered to be high heat input welding" o
A. 550J/ mm
o
B. 55J/ mm
o
C. 5. 5J/ mm
o
D. 5K J/ mm
)0.
+nitiation of a T+( arc using high fre9uency spark may not be allowed because it: o
A. Of t enca use s u t ngst eni ncl usi ons
o
B. Can da mag e el ect r oni c equi pm en t
o
C. I s an el ect r i ca l sa f et y h aza r d
o
D. Of t en ca use s t s op/ st ar t por osi t y
Questions and Answers 1.
Which mechanical test can be used to measure the toughness of weld metal !A" and parent metal? o
A. Macr o
o
B. Ni ck r ea Bk
o
C. Har dness
o
D. Char pympact i
2.
Which is the best destructi'e test for showing lack of sidewall fusion in a 2+mm thickness butt weld? o
A. Ni ck r ea bk
o
B. Si deben d
o
C. Char pympact i
o
D. Face bend
).
The principal purpose of a welder 9ualification test is to: o
A. Testt he sk i l l of t he wel der
o
B. Ass esst he wel dabi l i t y o ft he mat er i al s
o
C. Deci de hi wch D N T m et hod s o t use
o
D. Gi vet he w el der pr act i cebef or e d oi ng p r oduct i on w el di ng
*.
A abrication procedure calls for the toes of all welds to be blended in by grinding5 The reason for this is to:
o
A. Maket he wel d su i t i bl ef or l i qui d ( dye ) penet r ant i nsp ect i on.
o
B. I mpr ovef at i gue l i f e.
o
C. Reduc e e r si du al st r esse s
o
D. I mpr ove t hege ne r alap pe ar an ce f ot he w el ds
+.
or full penetration single;sided butt Boints' root bead penetration and profile are mainly influenced by: o
A. Rootf ac e
o
B. Beve l angl e
o
C. Root gap
o
D. I ncl uded angl e
,.
Which of the following would be cause for reBection by most fabrication standards when inspecting fillet welds with undercut' a small amount of: o
A.
Dept h o
B. Le ng t h
o
C. Wi dt h
o
D. Shar pness
.
When 1isually inspecting the root bead of a single C;butt weld it should be checked for: o
A. Lackof r oot penet r at i on
o
B. HAZ har dness
o
C. Tu ngst en n i cl usi ons
o
D. Sl ag
.
The strength of a fillet weld is determined by: o
A. Leg l engt h
o
B. Wel d pr ofil e
o
C. Wel d wi dt h
o
D. Thr oat t hi ck ness
/.
The )uropean Standard for *D) of fusion welds by 1isual e#amination is: o
A. EN 28 8
o
B. EN 49 9
o
C. EN 28 7
o
D. EN 97 0
10.
Cisual inspection of a fabricated item for a high integrity application should co1er inspection acti1ities: o
A. Bef or e, dur i ng and af t er wel di ng
o
B.
Bef or e wel di ng onl y o
C. Af t er wel di ng onl y
o
D. Dur i ng a nd a f t er wel di ng o nl y
11.
+ncomplete root penetration in a single C butt Boint may be caused by: o
A. Exce ss i ver oot f ace
o
B. Exce ssi ve oot r gap
o
C. The cu r r ent se t t i ngs b ei ng t oo l ow
o
D. Bot h a an d c
12.
+ncomplete root fusion in a single C butt weld may be caused by: o
A. Li ne armi sa l i gn men t
o
B. Rootga p be i ngt ool ar ge
o
C.
Rootf ac es ei b ngt oosm al l o
D. Wel di ng c ur r ent t oo hi gh
1).
When 1isually inspecting the face of a finished weld which of the following flaws would be considered to be the most serious" o
A. Excess el dwm et alhe i gh t
o
B. St art por os i t y
o
C. Spat t er
o
D. Ar c t s r i ke s
1*.
A burn;through may occur if the: o
A. Cur r ent i s o t o l ow
o
B. Root f acei s o t o l ar ge
o
C. Root gap i s o t o l ar ge
o
D. Ar c o vl t age i s o t o hi gh
1+.
A code of practice is a: o
A. St andar d o f wor km ans hi p q ual i t y on l y
o
B. Set of r ul es o f r manuf act ur i ng a sp eci ficpr oduct
o
C. Speci fica t i on f or t he fin i sh edpr od uct
o
D. Codef orhe t qua l i fica t i on of wel di ng pr oc edu r es andwel der s qual i fica t i ons
1,.
A solid inclusion in a weld may be: o
A. Ent r ap pe d sl ag
o
B. Ent r ap pe d ga s
o
C. Lackof i nt er r un f usi on
o
D. None oft he bove. a
1.
Which of the following is a planar imperfection" o
A. Lackof si dewal lf usi on
o
B. Sl ag n i cl usi on
o
C. Li near por osi t y
o
D. Rootco nc avi t y
1.
or fillet welds it is normal practice in the E and SA to measure: o
A. Thr oat t hi ck ness
o
B. Le gl en gt hs
o
C. Penet r at i on dept hs
o
D. Bot h a an d c
1/.
+n a bend test' when the face of the specimen is in tension and the root is in compression' the test is called a o
A. Root ben d
o
B. Si deben d
o
C. Face bend
o
D. Longi t udi nal bend
20.
>ea1y porosity on the surface of some MMA welds made on a construction site is most likely to be caused by: o
A. Useof t hewr ongcl as s o f el ect r odes
o
B. Useofexce ssi vecu r r en t
o
C. Moi st ur e pi ck-up i n t he el ect r ode c ove r i ng
o
D. A ba d ba t chofel ec t r ode s
21.
Slag inclusions may be present in
o
A. Man ua lmet alar c w el ds
o
B. Met al i ne r t gas w el ds
o
C. Met al ac t i ve a g s w el ds
o
D. Al l wel ds
22.
The main cause of undercut is o
A. Exc essi ve am ps.
o
B. Exc ess i ve C OV
o
C. Exce ssi vet r ave l sp ee d
o
D. Cur r ent t oo l ow
2).
Which group of welders is most likely to re9uire continuous monitoring by a welding inspector" o
A.
Conc r et e sh ut t er i ng wel de r s o
B. Ove r l and pi pe l i ne wel der s
o
C. Tack wel de r s
o
D. Mai nt en an ce el w de r s
2*.
Which of the following fillet welds is the strongest assuming they are all made of the same material and welded using the same WS" o
A. 8mm t hr oat of a mi t r e fil l et
o
B. 7m m l eg + 2m m ex ce s s w el d m et al
o
C. Mi t r e fil l etwi t h 10mm l eg
o
D. Con cave fil l etwi t h 1 1m m l eg .
2+.
A typical included angle for MMA welding a full penetration pipe butt Boint is: o
A. 35º
o
B. 70º
o
C. 90º
o
D. Depe nd ent ont hepi pedi am et er
2,.
A fillet weld has an actual throat thickness of -mm and a leg length of .mm' what is the e#cess weld metal" o
A. 2. 1m m
o
B. 1. 8m m
o
C. 3. 1m m
o
D. 1. 4m m
2.
The fusion boundary of a fillet weld is the: o
A. Boun dar y bet ween t he el wd m et aland HAZ
o
B.
Bou nd ary w bet eeni nd i vi du alwel dr uns o
C. Dept h of r oot penet r at i on
o
D. Bou nda r y bet wee n H AZ an d p ar en t mat er i al .
2.
+f a welding inspector detects a type of imperfection not allowed by the application Standard he must: o
A. Req ue stf ur t he r NDE
o
B. Rej ec tt hewel d
o
C. Pr ep ae r acon cessi onr eq ue st
o
D. Rej ectt he wel d onl y s i h e co nsi der s t it o be har mf ul .
2/.
@S )* F.4 allows the use of a magnifying glass for 1isual inspection but recommends that the magnification is: o
A. X2
o
B. X2 o t x5
C.
o
X5 o t x1 0
D.
o
Notgr eat er t hanx2 0 )0.
The maBority of welder 9ualification tests are carried out using unbacked Boints because: Discuss
o
A. I ti s q ui ck er and ch eaper i f back-go ugi ng i s n ot r equi r ed.
o
B. I ft he wel di ng pr oce ssi s n ot TI G. backpur gi ng i s n ot r equi r ed.
o
C. Al l wel der qual i fic at i on t est s a r e done on a sm al l di amet er pi pe.
o
D. I tr equi r es m or e sk i l l and i ncr ease s h t e wel der s'qual i fic at i on r ange.
Questions and Answers 1.
eflection of the arc by magnetic forces that can make welding difficult to control is commonly known as( o
A. Arci ni t i at i on
o
B.
Ar c m i sal i gn men t o
C. Ar c b l ow
o
D. Ar c o cns t r i c t i on
2.
Which of the following electrode types is classified to 3% 45 *//? o
A. E 38 3 R
o
B. E 601 3
o
C. E 7018G-
o
D. E 51 3 3B
).
Which type of electrode is used for sto1epipe welding for o1erland pipeline construction o
A. Rut i l e
o
B. Cel l ul os i c
o
C. Hi gh r ecove r y rut i l e
o
D. Ac i d-r ut i l e
*.
The three main types of MMA electrodes used for welding ! and !;Mn steels are: o
A. Bas i c ,c el l ul os i c a nd r ut i l e
o
B. Neut r al ,c el l ul os i c a nd r ut i l e
o
C. Basi c,ce l l ul osi c and neut r al
o
D. Rut i l e,l ow hy dr ogen and ba sc i
+.
A WS may specify a ma#imum width for indi1idual weld beads /the wea1e width2 when welding !;Mn steels5 if the width is e#ceeded it may cause: o
A. Lackof i nt er r un f usi on
o
B. A r ed uct i oni n H AZ t ou gh ne ss
o
C.
Lackof si dewal lf usi on
D.
o
To ol ow a deposi t i on r at e ,.
Gou notice that MMA electrodes with the flu# co1ering remo1ed are being used as filler rods for T+( welding5 This should not be allowed because: Discuss
o
A. I ti s was t ef ul
o
B. Ther oddi am et ermay e b oo t l ar ge
o
C. The el wd m et alcom po si t i on a my ber on w g
o
D. The r od s io t o sh or t
.
+n T+( welding' what is the benefit of a current slope;out de1ice" +t reduces555 o
A. Tu ngs t en sp at t er
o
B. Ri skof crat er crac ki ng
o
C. Ri skof ar c st r i ke s
o
D. I nt er pass emp t er at ur e
.
Which type of power source characteristic is normally used for manual welding" o
A. Cons t ant Vol t age
o
B. Fl at Char ac t er i st i c
o
C. Con san tt Cur r en t
o
D. A Mot orGene r at or
/.
+n MMA' welding penetration is principally controlled by: o
A. Ar c vo l t age
o
B. Wel di ng spe ed
o
C. Fer r osi l i co n i n t he el ect r ode co at i ng
o
D. Cur r en t
10.
ipe bores of some materials must be purged with argon before and during T+( welding in order to o
A. Pr eve nt l i near por osi t y
o
B. Pr eve nt bur nt hr ough
o
C. Pr ev ent ox i dat i on of t he r oot bead
o
D. El i mi nat e moi st ur e pi ckup i nt he r oot bead.
11.
The chemical composition of the weld metal deposited by a !;Mn steel MMA electrode is usually controlled by: o
A. Cor e wi r e co mpo st i on
o
B. Addi t i ons n it he flu x o cat i ng
o
C. I r on pow derni t he flu x c oat i ng
o
D. Di l ut i on r f om t he b asemat er i al
12.
Silicon is added to steel and the co1ering of MMA electrodes in order to: o
A. Pr ov i de deox i dat i on
o
B. I mpr ove st r engt h
o
C. I mpr ove t ou gh ne ss
o
D. Pr ov i de m or e e r si st anc e o t h yd r ogencr acki ng .
1).
A usible insert for T+( welding helps: o
A. Redu ce or p os i t y
o
B. Gi veco nt r ol l ed r oot penet r at i on
o
C. Avoi d he t nee d or f a b ack pu r ge
o
D. By a ci tg as aback n i ng f or t he r oot r un
1*.
According to AWS H57 a weld symbol for the other side is placed: o
A.
Abo vet heda she dl i ne o
B. Bel ow t hedash edl i ne
o
C. Abov e t he so l i d l i ne
o
D. Bel ow t he so l i dl i ne
1+.
The term low hydrogen electrode is often used for certain electrodes5 What type of co1ering will they ha1e" o
A. Cel l ul os i c
o
B. Rut i l e
o
C. Aci d
o
D. Bas i c
1,.
A >ydrogen controlled MMA electrode can always be recogni=ed by the: o
A. EN code et t er l( orAWS code num ber )
o
B. El ect r ode e l ngt h
o
C. Tr ade nam e
o
D. Col our of t he co ve r i ng
1.
According to @S )* HH%%6 a weld symbol for the other side is placed: o
A. Abo vet heda she dl i ne
o
B. Bel ow t hedash edl i ne
o
C. Abov e t he so l i d l i ne
o
D. Bel ow t he so l i dl i ne
1.
Which of the following units is used to e#press heat input" o
A. Jo ue l s
o
B. N/ mm2
o
C. J / mm2
o
D. KJ/ mm
1/.
Which of the following elements is added to steel to gi1e resistance to creep at ele1ated ser1ice temperatures" o
A. Ni ckel
o
B. Mang ane s e
o
C. Mol ybdenum
o
D. Al umi ni um
20.
*ick break and fillet fracture tests are used for assessing: o
A. Wel d qual i t y
o
B. Wel d met al duct i l i t y
o
C.
Wel d m et alt ou gh ne ss o
D. Resi st ancet of r act ur e
21.
Which of the following steels is considered non;magnetic" o
A. 18 % Cr ,8% Ni
o
B. 2. 25C r 1M o
o
C. 9% Cr ,1M o
o
D. 9%Ni
22.
Weld spatter during MMA welding is most likely to be caused by: o
A. Excess i vecu r r en t
o
B. I nco r r ectbaki ng and st or age of el ect r odes
o
C. Bad b ach t ofel ect r odes
o
D.
To o ow l an C OV 2).
A 9ualified Welding rocedure Specification is used to: o
A. Gi vei nst r uct i on t o t he wel der
o
B. Gi vei nf or mat i on o t h t e w el der
o
C. Gi veco nfid enc et hat wel ds w i l lhave t he sp eci fie d pr oper t i es .
o
D. Al l of t he above
2*.
An arc strike /stray flash2 on a steel component is regarded by some codes as unacceptable because: o
A. I t wi l l ca useco pper co nt ami nat i on
o
B. I t may ca us e h ad r sp ot s
o
C. I t maygi vecr ack i ng
o
D. Bot h Band C
2+.
+n a trans1erse tensile test brittleness would be indicated if: o
A. Ther e i s ar educt i on i n cros s-se ct i on at t he posi t i on of f r act ur e
o
B. The f r act ur e s ur f acei s fla t and e f at ur el ess u b t has ar ough su r f ace
o
C. Fr act ur e o ccu r r ed n i h t e wel d met al
o
D. Thef r act ur e ace f sho ws be ach mar ks
2,.
The surface of a fatigue crack will: o
A. Be ou rghan d or tn
o
B. Have sha r p che vr onmar ki ngs
o
C. Be s moot h
o
D. Have sh ear l i ps
2.
What does the number $7$ refer to when it is written ne#t to the tail when using symbols o
A. WPS u n mber
o
B. Wel di ngpr oce ss
o
C. Fi l l er m at er i al
o
D. Accept ance St and ar d
2.
The current&polarity used for T+( welding of all materials e#cept aluminium and magnesium is: o
A. DC ne gat i ve
o
B. DC posi t i ve
o
C. AC
o
D. Squar e w av e A C
2/.
A typical temperature range for baking basic coated electrodes is:
o
A. 150-200ºC
o
B. 200-250ºC
o
C. 300-350ºC
o
D. 400-450ºC
)0.
+f welding tra1el speed is doubled but the current and 1oltage remain the same the heat input will be: o
A. Reduced y 50% b
o
B. I ncr ease d bya f act or of t wo
o
C. Abou tt he sam e
o
D. Red uced by pp ar oxi mat el y 25 %
Questions and Answers 1.
Which of these drawing symbols shows weld penetration depth in accordance with @S )* HH%%6"
o
A.
o
B.
o
C.
o
D. 2.
3% 45 2 and 3% 45 6%7 1+,1* are specifications for? o
A. Wel der appr ov al t est i ng
o
B. Wel di ng e qui pment ca l i br at i on
o
C. Wel di ngpr oce du r e a pp r oval
o
D. Consu mab l es or fsubm er ge d a r c w el di ng
).
What determines the penetrating power of gammer rays" o
A. Ti me
o
B. Ty pe of i so t ope
o
C. Sour ce t ofil mdi st ance
D.
o
Sour cest r engt h *.
Which element has the greatest effect on the >A? hardness of !;Mn steel" A.
o
Mol ybdenum
B.
o
Chr om i um
C.
o
Ti t ani um
D.
o
Car bon +.
reheating a steel plate with a carbon e9ui1alent /!)C2 of 457- may be re9uired to: Discuss
o
A. Dr i vemoi st ur ef r om t he pl at e
o
B. Pr eve ntexce ssi ve ar h de ni ngi nt heHAZ
o
C. Pr ev ent t he f or mat i on of ca r bi des
o
D. I mpr ove t hemec ha ni cal pr op ert i esoft hewel d met al
,.
A welder appro1al certificate should be withdrawn if: o
A. He h as ot n do neany el w di ngf or4 m on t hs
o
B. He ha s bee n a bsen tf r om wor k or f 7 m on t hs
o
C. The r epai rr at ef or hi s w or k e xce eds 1 %
o
D. Hi s w or k has n bee exam i ned by T U onl y
.
+n friction welding' the metal at the interface when the Boining occurs is describes as being in the: o
A. Li qui d st at e
o
B. I nt erc ri t i c al s t at e
o
C. Pl as t i cs t at e
o
D.
El as t i cs t at e .
A penertrameter /+Q+2 is used to measure the: o
A. Si zeof di sc ont i nui t y n i a wel d j oi nt
o
B. Densi t y o fa r adi ogr aphi c l fi m
o
C. Deg r eeoffil m co nr t as t
o
D. Qual i t y o ft he r adi ogr aphi c e t ch ni que
/.
Which of the following cutting methods is suitable for cutting stainless steel" o
A. Pl asm a
o
B. Oxyace t yl ene
o
C. Oxypr op an e
o
D. I t de pe nd s u po nt het hi ckn es s.
10.
Which of the following would be classed as the most serious type of defect" o
A. A bur i ed l i near sl ag i ncl usi on
o
B. Bur i ed l ackof i nt er r un f usi on
o
C. Sur f acebr eaki ng l ackof si dewal lf usi on
o
D. Sur f acepor osi t y
11.
ltrasonic testing has an ad1antage o1er other *DT methods for the detection of: o
A. Lackof si dewal lf usi on
o
B. Roo t un de r cut
o
C. I nco mpl et el y fil l ed g r oove
o
D. Rootco nc avi t y
12.
)#ceeding the ma#imum interpass temperature specified for a !;Mn steel weld Boint may gi1e:
o
A. Exce ss i vepor osi t y
o
B. Bur n h t r ou gh
o
C. Low ert ou gh ne ss
o
D. Hi gher st r engt h
1).
M+(&MA( welding has a tendency to gi1e lack of sidewall fusion when: o
A. Spr ayt r ansf er co ndi t i ons a r e use d
o
B. 10 0% CO2 shi el di ng as g si used
o
C. Pul se d cu r r ent i s u se d
o
D. Di p t r ansf er
1*.
The temperature range o1er which a steel goes from ha1ing high to low toughness is called the: o
A.
Cr i t i ca lt r ansf or mat i on e t mper at ur e o
B. Duct i l i t y di p t emper at ur e
o
C. Bi mod alt em pe r at ur e
o
D. Tran si t i on e t mper at ur e
1+.
or SAW' what is the effect of raising arc 1oltage but keeping all other parameters the same" o
A. Wel d bead wi dt h wi l li ncr eas e
o
B. Dept h of penet r at i on wi l li ncr ease
o
C. Wel d be adwi dt h wi l lde cr ea se
o
D. Dept h of penet r at i on wi l l decr ease
1,.
!hanging an essential 1ariable beyond the allowed limits for a 9ualified welding procedure: o
A. May ha cnge he t mech ani ca lpr oper t i esoft he oi jnt
o
B. Mayad ve r se l y a ffe ctt he qua l i t y o ft he wel d
o
C. Wi l lr eq ui r e a new wel di ngpr oc ed ur et o beapp r ove d
o
D. Al l of t he above
1.
With reference to the 1arious grades of stainless steels which of the following statements is true" o
A. The y a r e al lno nmag ne t i c
o
B. The y al lr eq ui r e 1 00 % Ar f orGMAW
o
C. Theyal l haveve r y h i gh t her mal co nduct i vi t y
o
D. Onl y ce r t ai n gr adesca n be us ed f or se r vi ceat ve r y ow l t emper at ur es
1.
Which of the following AWS A%5$ electrodes has a rutile co1ering: o
A. E 601 0
o
B.
E 701 6
C.
o
E 701 8
D.
o
E 601 3 1/.
Welds made with 1ery high heat input will show a reduction in: A.
o
Tens i l e duc t i l i t y
B.
o
Not ch ou t gh ne ss
C.
o
Fat i gue st r engt h
D.
o
Cr eepr esi st anc e 20.
During W>T of a comple# fabrication' it is heated to the soak temperature at a much faster rate than specified by the procedure5 This may: Discuss
o
A. Caus e e xce ssi ve xi o dat i on
o
B. Not al l ow su ffici ent t i me t or el i evest r ess es
o
C. I nt r oduceexce ssi veco mpr essi ve t r s esse s
o
D. Causedi st or t i on
21.
When MA( welding in dip transfer /a short;circuiting mode2 spatter can be reduced by: o
A. Usi ngi nd uc t an ce
o
B. Us i ng10 0% CO2
o
C. Usi ng Ar +30% He
o
D. I ncrea si ng t he st i ck out l engt h
22.
Repair welding of in;ser1ice plant and e9uipment may be more difficult than making repairs during initial fabrication because: o
A. Themat er i almay be con t am i na t ed
o
B. Acce ss ote r pa i r ar eamay e bd i fficu l t
o
C.
Posi t i on alwel di ngmay e bne ed ed o
D. Al l of t he above
2).
or gammer radiography of a steel weld at 6%mm thickness' the recommended isotope is: o
A. Thu l i um 170
o
B. Yt t er bi um 16 9
o
C. I r i di um 192
o
D. Cob al t 60
2*.
The sensiti1ity of a radiograph is assessed: o
A. By u sng i a de nsi t om et er
o
B. By u sn i g an i mage qual i t y n i di ca t or ( I QI )
o
C. Fr om t he VA K used
o
D. Fr om t he so ur ce / t ubet o w or k st an do ff d i st an ce se ud
2+.
A trans1erse tensile test from a Weld rocedure Appro1al Record /WAR2 test plate is used to measure: o
A. Te nsi l e st r engt h of t he wel d
o
B. Tensi l e st r engt h of t he j oi nt
o
C. St r ess / st r ai n ch ar act er i st i csof t he wel d
o
D. St r es s / s t r ai n c har ac t er i s t i csof t he j oi nt
2,.
The highest and lowest heat input positions are considered to be: o
A. PB hi gh es t ; PA l ow est .
o
B. PE hi gh est ; PC l ow est .
o
C. PD hi gh est ; PB l ow est .
o
D.
PF hi gh est ; PG l ow est . 2.
What type of co1ering will an electrode ha1e that is suitable for welding <4mm !;Mn steel and can gi1e good weld metal toughness at ;%4I!" o
A. Rut i l e
o
B. Bas i c
o
C. Cel l ul os i c
o
D. Choi cewi l l depen d ont hewel di ng posi t i on
2.
The dip transfer or short;circuiting mode of metal transfer used for M+(&MA( welding is characteri=ed by: o
A. Gi vi ng de ep penet r at i on
o
B. Bei ng su i t abl e f or posi t i onal wel di ng
o
C. Gi vi ng l ow sp at t er
o
D. Gi vi ng h i gh d eposi t i on
2/.
!arbon e9ui1alent 1alues /!)C2 are used to determine how to a1oid the risk of: o
A. Hydr og encr acki ng
o
B. Lamel l ar t ear i ng
o
C. Sol i di fic at i on crac ki ng
o
D. Wel d decay
)0.
When two different material types are welded together the Boint is referred to as: o
A. A co mposi t e o j i nt
o
B. A t r ans i t i on j oi nt
o
C. An a ut oge nou s w el d
o
D. Het er oge ne ous oi j nt
Page 2 of 43 (a)
4% Chromium Molybdenum (b)
12% Chromium (c)
Austenitic Stainless Steel (d)
% !ic"le Steel
#$
&hen ' *elding Austenitic Stainless Steel +i+e, Argon gas ba"ing is called for 'his is to-
(a)
Prevent oxidation (b)
Pre.ent under bead crac"ing (c)
Pre.ent +orosity (d)
Control the +enetration bead sha+e
#
Pre/heating a carbon steel manual metal arc *elding is carried out to minimi0e the ris" of-
(a)
Scattered +orosity (b)
&orm hole +orosity (c)
Parent metal cracking (d)
ac" of +enetration
1#
n +ractice, S4 +art 2 s+eci5es that the dra*ing dimension 6uoted for a 5llet *eld is the-
(a)
Leg length (b)
Actual throat thic"ness (c)
&eld length
11
7or o+en site manual metal arc *elding the follo*ing e6ui+ment is a.ailable &hich *ouldyou
choose for safe *or"ing8
(a)
Single o+erator transformer (b)
Multi o+erator transformer (c)
AC 9 :C com+osite +o*er unit (d)
Diesel engine driven motor generator
12
f Submerged arc *elding is to be used to ma"e butt *elds, *hich *ould you be most critical of8
(a)
'he root ga+ tolerance (b)
'he angle of +re+aration
(c)
'he root face *idth (d)
'he gas cut 5nish
13
:uring C;2 *elding, the arc length is most li"ely to be a
(a)
'he *ire diameter (b)
'he current retu rn connection (c)
'he gas =o* r ate (d)
'he torch to *or" angle
14
Preheating for arc *elding a++lies to-
(a)
Assembly *elding only (b)
Assembly and tac" *elding (c)
>oints o.er 2?mm thic" only Page 3 of 43 (d)
Cruciform *elds only
1?
@ou see a *elder using an oy/acetylene =ame *ith a long feathered inner cone &hat *ould be the e
(a)
The weld could be hard and brittle (b)
'he *eld metal could be too soft (c)
'here *ill be no e
'he *eld *ill ha.e undercut
1B
A *elder 6uali5cation test is to .erify-
(a)
Skill of the welder
(b)
'he 6uality of the materials (c)
'he non/destructi.e test +rocedures (d)
'he manufacturing method
1
A fa bricating +rocedure calls for 5llet *elds to be Dblended inE by grinding 'his is to in=uence-
(a)
F A G crac"ing (b)
Fatigue life (c)
Hesidual stress (d)
@ield strength
1$
end test s+ecimens ha.e been ta"en from a 2?mm thic" carbon steel butt *eld &hich *ould sho* lac" of inter/run fusion-
(a)
Side bend
(b)
Hoot bend (c)
7ace bend (d)
uided bend
1
amellar tearing has occurred in a steel fabrication efore *elding could it ha.e been found by-
(a)
I/ray eamination (b)
:ye +enetrant (c)
ltrasonic ins+ection (d)
It would not have been found b an ins!ection method
2#
@ou a re to o.ersee the arc *eld ing of s ome mach ined 5tting s and 5 nd t hey are cadm ium +lat ed &ould you-
(a)
Permit it to +roceed (b)
Permit it to +roceed *ith fume etraction (c)
Sto! the o!eration at once
(d)
Ad.ise the *elder to drin" mil" and +roceed
21
'he unit of >oules *ould be used to measure-
(a)
'ensil e strength
(b)
Im!act energ (c)
Fardness
