CWB Welding Inspector Level 3
Exam Study Guide – Practice
Questions with Verified
Answers. GRADED A+. Latest
2026/2027 Update
1.To measure the strength of a welded joint what mechanical test would you
prescribe?
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
2. Select the cutting process that would provide the narrowest heat affected
zone when cutting 12.5 mm (0.5 in) thick carbon steel.
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
,3. Which of the following refers to a welder test where a pipe assembly is
placed vertically and the joint welded in the horizontal position without
rotating the assembly?
a) 1G
b) 2G
c) 3G
d) 5G
e) 6G - Answer✔✔- b) 2G
4. Which of the following imperfections is normally considered as unacceptable
regardless of size or location?
a) Porosity.
b) Crack.
c) Inadequate penetration.
d) Lamination.
e) Burn-through. - Answer✔✔- b) Crack.
5. Select the correct penetrameter thickness for 2% sensitivity when
radiographing a weldment 1 .25 inches in thickness.
a) 0.012 in.
b) 0.015 in.
c) 0.025 in
d) 0.030 in. - Answer✔✔- c) 0.025 in
6. Which of the following statements concerning porosity is true?
,a) Porosity cannot be trapped within a weld.
b) Porosity moves up through later passes and will show only in a final pass.
c) Porosity is restricted to the centre line of a weld.
d) Porosity can result from faulty welder technique.
e) Porosity can be dissipated by an appropriate heat treatment. - Answer✔✔-
d) Porosity can result from faulty welder technique.
7. An irregular, dense white spot is seen on the radiograph of a weld. Assuming
it was caused by the welding process used, which one of the processes below
would be responsible?
a) SMAW process.
b) GTAW process.
c) GMAW process.
d) ST process.
e) ESW process. - Answer✔✔- b) GTAW process.
8. Which of the following operations is known to result in the emission of
ionizing radiation at levels dangerous to human health?
A) shield metal arc welding.
B) Plasma arc welding.
C) Operation of high voltage portable generator sets.
d) Radiographic inspection.
e) Electroslag and electrogas welding. - Answer✔✔- d) Radiographic
inspection.
9. The ultrasonic transducer is pressed against the plate of a welded joint. The
sound travels
, longitudinally through the plate to the opposite side. The signal seen on the UT
screen that comes from this opposite side of the plate:
a) Is the initial pulse signal.
b) Is the back reflection signal.
c) Is the front reflection signal.
d) Must be equal in amplitude to any defect signal.
e) Cannot be used for establishing the thickness of the material under test. -
Answer✔✔- b) Is the back reflection signal.
11. Which of the following is a stainless steel electrode?
a) E4918-1
b) E4918-A1
c) E4818
d) E308-16
e) E4111 - Answer✔✔- d) E308-16
12. Reverse polarity refers to the use of a:
a) AC power source, electrode +
b) DC power source, electrode+
c) AC power source, electrode-
d) DC power source, electrode- - Answer✔✔- b) DC power source, electrode+
13. Which welding process(es) can result in metallic inclusions in the weld?
a) SMAW.
b) FCAW.
Exam Study Guide – Practice
Questions with Verified
Answers. GRADED A+. Latest
2026/2027 Update
1.To measure the strength of a welded joint what mechanical test would you
prescribe?
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
2. Select the cutting process that would provide the narrowest heat affected
zone when cutting 12.5 mm (0.5 in) thick carbon steel.
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
,3. Which of the following refers to a welder test where a pipe assembly is
placed vertically and the joint welded in the horizontal position without
rotating the assembly?
a) 1G
b) 2G
c) 3G
d) 5G
e) 6G - Answer✔✔- b) 2G
4. Which of the following imperfections is normally considered as unacceptable
regardless of size or location?
a) Porosity.
b) Crack.
c) Inadequate penetration.
d) Lamination.
e) Burn-through. - Answer✔✔- b) Crack.
5. Select the correct penetrameter thickness for 2% sensitivity when
radiographing a weldment 1 .25 inches in thickness.
a) 0.012 in.
b) 0.015 in.
c) 0.025 in
d) 0.030 in. - Answer✔✔- c) 0.025 in
6. Which of the following statements concerning porosity is true?
,a) Porosity cannot be trapped within a weld.
b) Porosity moves up through later passes and will show only in a final pass.
c) Porosity is restricted to the centre line of a weld.
d) Porosity can result from faulty welder technique.
e) Porosity can be dissipated by an appropriate heat treatment. - Answer✔✔-
d) Porosity can result from faulty welder technique.
7. An irregular, dense white spot is seen on the radiograph of a weld. Assuming
it was caused by the welding process used, which one of the processes below
would be responsible?
a) SMAW process.
b) GTAW process.
c) GMAW process.
d) ST process.
e) ESW process. - Answer✔✔- b) GTAW process.
8. Which of the following operations is known to result in the emission of
ionizing radiation at levels dangerous to human health?
A) shield metal arc welding.
B) Plasma arc welding.
C) Operation of high voltage portable generator sets.
d) Radiographic inspection.
e) Electroslag and electrogas welding. - Answer✔✔- d) Radiographic
inspection.
9. The ultrasonic transducer is pressed against the plate of a welded joint. The
sound travels
, longitudinally through the plate to the opposite side. The signal seen on the UT
screen that comes from this opposite side of the plate:
a) Is the initial pulse signal.
b) Is the back reflection signal.
c) Is the front reflection signal.
d) Must be equal in amplitude to any defect signal.
e) Cannot be used for establishing the thickness of the material under test. -
Answer✔✔- b) Is the back reflection signal.
11. Which of the following is a stainless steel electrode?
a) E4918-1
b) E4918-A1
c) E4818
d) E308-16
e) E4111 - Answer✔✔- d) E308-16
12. Reverse polarity refers to the use of a:
a) AC power source, electrode +
b) DC power source, electrode+
c) AC power source, electrode-
d) DC power source, electrode- - Answer✔✔- b) DC power source, electrode+
13. Which welding process(es) can result in metallic inclusions in the weld?
a) SMAW.
b) FCAW.
