CWB Level 2 Closed Book Exam Questions And
Answers 2024-2025
For the cutting of 12.5 mm (0.5 in) thick carbon steel, which of the following cutting
operations gives the smallest heat affected zone?
a) Oxy-acetylene cutting.
b) Air-carbon arc cutting.
c) Oxy-propane cutting.
d) Plasma arc cutting.
e) Laser beam cutting - Answer e) Laser beam cutting
Which of the following weld processes may produce metallic inclusions within the weld?
a) SMAW.
b) FCAW.
c) GMAW.
d) GTAW.
e) SAW Answer d) GTAW.
To establish the strength of a welded joint which of the following mechanical tests would
you recommend?
a) A transverse weld tension test.
b) A charpy test.
c) A CTOD test.
d) An all weld metal tension test.
e) A side bend test. - Answer a) A transverse weld tension test.
For a drawing to the scale of 1:50, what distance would be represented by a distance on
the drawing of 6 cm?
, a) 12 cm.
b) 30 cm.
c) 50 cm.
d) 240 cm.
e) 300 cm. - Answer e) 300 cm.
As a general rule, weld discontinuities detected by ultrasonic testing are accepted or
rejected on the basis of:
a) Vertical linearity.
b) Time base analysis.
c) Horizontal response data.
d) Noise to signal ratio.
e) Signal amplitude. - Answer e) Signal amplitude.
An AC welding circuit has the advantage of:
a) Best use is with large electrodes on thin materials.
b) Best use is with small electrodes on thin sections.
c) It helps to eliminate arc blow.
d) It minimizes internal undercut. - Answer c) It helps to eliminate arc blow.
The resistance of steel to failure by brittle fracture is commonly evaluated by
conducting a:
a) Rockwell C hardness test.
b) Tensile test.
c) Chemical analysis.
Answers 2024-2025
For the cutting of 12.5 mm (0.5 in) thick carbon steel, which of the following cutting
operations gives the smallest heat affected zone?
a) Oxy-acetylene cutting.
b) Air-carbon arc cutting.
c) Oxy-propane cutting.
d) Plasma arc cutting.
e) Laser beam cutting - Answer e) Laser beam cutting
Which of the following weld processes may produce metallic inclusions within the weld?
a) SMAW.
b) FCAW.
c) GMAW.
d) GTAW.
e) SAW Answer d) GTAW.
To establish the strength of a welded joint which of the following mechanical tests would
you recommend?
a) A transverse weld tension test.
b) A charpy test.
c) A CTOD test.
d) An all weld metal tension test.
e) A side bend test. - Answer a) A transverse weld tension test.
For a drawing to the scale of 1:50, what distance would be represented by a distance on
the drawing of 6 cm?
, a) 12 cm.
b) 30 cm.
c) 50 cm.
d) 240 cm.
e) 300 cm. - Answer e) 300 cm.
As a general rule, weld discontinuities detected by ultrasonic testing are accepted or
rejected on the basis of:
a) Vertical linearity.
b) Time base analysis.
c) Horizontal response data.
d) Noise to signal ratio.
e) Signal amplitude. - Answer e) Signal amplitude.
An AC welding circuit has the advantage of:
a) Best use is with large electrodes on thin materials.
b) Best use is with small electrodes on thin sections.
c) It helps to eliminate arc blow.
d) It minimizes internal undercut. - Answer c) It helps to eliminate arc blow.
The resistance of steel to failure by brittle fracture is commonly evaluated by
conducting a:
a) Rockwell C hardness test.
b) Tensile test.
c) Chemical analysis.
