Welding Inspection:
Multi-Choice Questions
Paper 3
Please return this paper unar!ed 1.
Which type of submerged arc welding flux is susceptible to moisture pick-up? A B C
!.
A large large grain si"e# in the $A% of a C-&n steel weld 'oint# may ha(e..... A B C
).
12 Argon 32 Argon 4 )2 $e Argon 4 2 $ydrogen Argon 4 !2 C5!
+he presence of iron sulphides in a weld bead may cause ........ A B C
6.
yield strength co-efficient of of th thermal ex expansion elastic modulus co-efficient of el electrical con conducti(ity
Which of the following is a suitable shielding gas for 0CAW of stainless steels? A B C
3.
C-&n steels austenitic stainless steels low alloy loy stee steels ls for ele( ele(aated ted tem temp.s p.ser(i er(icce low ca carbon st steels fo for cr cryogenic se ser(ice
+he property of a material that has the greatest influence on welding distortion is the..... A B C
/.
the te tensile st strength of of the we welded 'o 'oint the le le(el of of re residual st stress in in bu butt 'o 'oints the fracture toughness of the $A% the the thr throu ough gh thi thic! c!ne ness ss duct ductil ilit it# # o$ a stee steell plat platee (t (the he %&% %&% dir direc ecti tion on))
+he risk of hydrogen cracking is higher when &&A welding of ........ A B C
.
low ductility low toughness high toughness high tensile strength
A *+,A test is used to measure........ A B C "
.
neutral agglomerated fused they are all about the same
solidification cracking hydrogen cracking lamellar tearing weld decay
A macro section is particularly good for showing ......... A B C
the $A% microstructure o(erlap the weld metal microstructure all of the abo(e
+W7 8orth# &iddlesbrough
1
(Rev. 2)
Welding Inspection:
Multi-Choice Questions
Paper 3
(Rev. 2)
Please return this paper unar!ed 9.
Which of the following procedures would be expected to produce the least distortion in 1mm straight butt weld ? A B C
+7: weld &&A weld &&A weld *AW weld
single sided# multi-pass single sided# multi-pass double sided# multi-pass 1 pass per side
1. A suitable gas ;gas mixture# for :&AW of aluminium is ...... A B C
12 C5! 12 Argon 62 Argon 4 !2 C5! 962 Argon 4 !2 5!
11. Which of the following is associated with *AW more often than it is with &&A welds is ? A B C
hydrogen cracking in the $A% solidification cracking in the weld metal re-heat cracking during
1!. =8 7*5 613 >e(el C@ specifies that the limit for the diameter >@ of a single pore in a weld is ≤ .)s# but max.mm where s material thickness. 0or which of the following situations is the pore acceptable? A B C
s !mm# measured pore diameter .mm s 1mm# measured pore diameter .mm s 1mm# measured pore diameter ).mm s 1mm# measured pore diameter ).mm
1). +o measure arc (oltage accurately it is recommended that the (oltmeter should be connected ....... A B C
across the arc and as near as practical to the arc across the power source terminals prior to arc initiation across the power source terminals during the welding operation all of the abo(e are suitable
1. amellar tearing has occurred in a steel fabrication. What techniue could ha(e been used to find it before the weld was made ? A B C
D-ray examination liuid penetrant examination ultrasonic examination it could not ha(e been found by any inspection method.
1.
porosity excessi(e distortion $A% cracking lack of fusion
+W7 8orth# &iddlesbrough
!
Welding Inspection:
Multi-Choice Questions
Paper 3
(Rev. 2)
Please return this paper unar!ed 1/. +ypical temperatures used for normalising a C-&n steel plate are ........ A B C
/ to /EC 1 to 11EC 3 to 6EC 66 to 9!EC
13. 0or :&AW the burn-off rate of the wire is directly related to ......... A B C
the stick-out length wire feed speed the arc (oltage the tra(el speed
16. 0or &&A welding of a /mm wall no""le to a 1mm wall (essel shell# pre-heat temperature should be checked . A B C
before welding starts;re-starts on the shell and the no""le at points at least 3mm from the 'oint edge all of the abo(e
19. A crack running along the centreline of a weld bead could be caused by ......... A B C
use of damp flux lack of preheat arc (oltage being too high weld bead being too deep and (ery narrow
!. 7n order to impro(e resistance to ser(ice failure caused by cyclic loading# it is good practice to ....... A B C
use low heat input welding use steel with a low C=F ensure there are no features that gi(e high stress concentration all of the abo(e
!1. +he use of low carbon austenitic stainless steels and stabilised stainless steels will minimise the risk of ....... A B C
$A% cracking weld decay weld metal cracking distortion
!!. Which type of *AW flux is susceptible to breaking down into fine particles during circulation? A B C
fused neutral alloyed agglomerated
!). +he maximum hardness in the $A% of a steel will increase if the ....... A B C
heat input is increased C=F is increased 'oint thickness is decreased all of the abo(e
+W7 8orth# &iddlesbrough
)
Welding Inspection:
Multi-Choice Questions
Paper 3
(Rev. 2)
Please return this paper unar!ed !. B* =8 7*5 613 >e(el B@ specifies the limit for =xcess Weld &etal >h@ on a butt weld as h ≤ 1mm 4 .1b# but max. mm# b weld width. 7n which of the following situations is the measured =xcess Weld &etal acceptable. A B C
b 1 b ! b ) b
measured excess weld metal !.mm measured excess weld metal ).mm measured excess weld metal .mm measured excess weld metal .mm
!. A carbon manganese steel is being welded by &&A and the electrode run-out-lengths that ha(e been used are much shorter than specified by the W<*. +his de(iation may gi(e ...... A B C
an increased risk of hydrogen cracking an increased risk of solidification cracking lower (alues of $A% toughness higher (alues of $A% hardness
!/. +he first procedure that is prepared for a Weld
pW<* W<* W
!3. +ransfer of material identification by hard stamping is sometimes not allowed for high integrity applications because ...... A B C
it is too slow it can be a safety ha"ard it may be damaging to the material all of the abo(e
!6. When welding thin plate# distortion can be minimised by ...... A B C
using back-step welding minimising weld (olume using bridge tacks all of the abo(e
!9. Which of the following would be considered to be high $eat 7nput welding? A B C
H;mm H;mm . H;mm . kH;mm
). 7nitiation of a +7: arc by using a $igh 0reuency spark may not be allowed because .......... A B C
it often causes tungsten inclusions it can damage electronic euipment it is an electrical safety ha"ard it often causes stop;start porosity
+W7 8orth# &iddlesbrough
