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CWB QUESTIONS AND ANSWERS RATED A+ 2024/2025
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CWB QUESTIONS AND ANSWERS RATED A+ 2024/2025
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CWB1.To degree the strength of a welded joint what mechanical check might you prescribe?
A) A transverse weld anxiety take a look at
b) A charpy take a look at.
C) A CTOD take a look at.
D) An all weld metal tension check. E) A aspect bend take a look at. - ANSa) A transverse weld
anxiety take a look at
2. Select the slicing method that would offer the narrowest heat affected quarter when reducing
12.5 mm (0.5 in) thick carbon metal.
A) Oxy-acetylene reducing.
B) Air-carbon arc cutting.
C) Oxy-propane cutting.
D) Plasma arc slicing.
E) Laser beam cutting - ANSe) Laser beam cutting
three. Which of the subsequent refers to a welder test wherein a pipe assembly is positioned
vertically and the joint welded within the horizontal function without rotating the assembly?
A) 1G
b) 2G
c) 3G
d) 5G
e) 6G - ANSb) 2G
four. Which of the following imperfections is generally considered as unacceptable no matter
size or place?
A) Porosity.
B) Crack.
C) Inadequate penetration.
D) Lamination.
E) Burn-via. - ANSb) Crack.
Five. Select the perfect penetrameter thickness for 2% sensitivity whilst radiographing a
weldment 1 .25 inches in thickness.
A) 0.012 in.
B) 0.Half in.
C) 0.Half in
d) 0.030 in. - ANSc) 0.1/2 in
6. Which of the following statements regarding porosity is actual?
A) Porosity can't be trapped inside a weld.
,B) Porosity movements up via later passes and could show handiest in a very last pass.
C) Porosity is restricted to the centre line of a weld.
D) Porosity can result from faulty welder approach.
E) Porosity can be dissipated with the aid of an appropriate warmth treatment. - ANSd) Porosity
can end result from defective welder technique.
7. An abnormal, dense white spot is visible on the radiograph of a weld. Assuming it turned into
caused by the welding technique used, which one of the methods underneath would be
accountable?
A) SMAW system.
B) GTAW method.
C) GMAW manner.
D) ST method.
E) ESW process. - ANSb) GTAW technique.
8. Which of the following operations is understood to bring about the emission of ionizing
radiation at levels risky to human health?
A) protect metal arc welding.
B) Plasma arc welding.
C) Operation of high voltage portable generator units.
D) Radiographic inspection.
E) Electroslag and electrogas welding. - ANSd) Radiographic inspection.
9. The ultrasonic transducer is pressed in opposition to the plate of a welded joint. The sound
travels
longitudinally thru the plate to the opposite facet. The signal visible on the UT display screen
that comes from this opposite side of the plate:
a) Is the initial pulse sign.
B) Is the again mirrored image signal.
C) Is the the front reflection signal.
D) Must be identical in amplitude to any defect signal.
E) Cannot be used for establishing the thickness of the fabric underneath check. - ANSb) Is the
again reflection sign.
11. Which of the following is a stainless steel electrode?
A) E4918-1
b) E4918-A1
c) E4818
d) E308-sixteen
e) E4111 - ANSd) E308-16
12. Reverse polarity refers to the use of a:
a) AC power supply, electrode +
b) DC strength source, electrode+
, c) AC strength supply, electrode-
d) DC electricity source, electrode- - ANSb) DC power supply, electrode+
13. Which welding method(es) can bring about metallic inclusions inside the weld?
A) SMAW.
B) FCAW.
C) GMAW.
D) GTAW
e) SAW - ANSd) GTAW
14. In generating a drawing for a scale of 1:50, what could be the distance represented via a
distance on the drawing of 6 em?
A) 12 em.
B) 30 em.
C) 50 em.
D) 240 em.
E) three hundred em. - ANSe) 300 em.
15. As a preferred rule, weld discontinuities detected by means of ultrasonic checking out are
customary or rejected on the idea of:
a) Vertical linearity.
B) Time base evaluation.
C) Horizontal reaction statistics.
D) Noise to sign ratio.
E) Signal amplitude. - ANSe) Signal amplitude.
16. An benefit of an AC welding circuit is:
a) It is nice used with huge electrodes on thin substances.
B) It is exceptional used with small electrodes on thin sections.
C) It enables to get rid of arc blow.
D) It minimizes internal undercut. - ANSc) It facilitates to cast off arc blow.
17. The resistance of metal to failure via brittle fracture is typically assessed by using
conducting a:
a) Rockwell C hardness test.
B) Tensile take a look at.
C) Chemical evaluation.
D) Hydrogen embrittlement check.
E) Notched bar impact take a look at. - ANSe) Notched bar effect check.
18. Which one of the following SMAW electrodes is confined to horizontal and flat function
welding?
A) EXX18
b) E4916
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