Page 1 of 237
CWB LEVEL 2 CLOSED BOOK EXAM STUDY GUIDE E
WITH COMPLETE 550 QUESTIONS AND WELL
ELABORATED ANSWERS JUST RELEASED
QUESTION: 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.
QUESTION: 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.
, Page 2 of 237
QUESTION: 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.
QUESTION: 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.
, Page 3 of 237
QUESTION: Which of the following operations is known to result in the emission of ionizing
radiation at levels dangerous to human health?
a) Shielded 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.
QUESTION: 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.
, Page 4 of 237
QUESTION: 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
QUESTION: 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 +
QUESTION: Which welding process(es) can result in metallic inclusions in the weld?
a) SMAW.
b) FCAW.
CWB LEVEL 2 CLOSED BOOK EXAM STUDY GUIDE E
WITH COMPLETE 550 QUESTIONS AND WELL
ELABORATED ANSWERS JUST RELEASED
QUESTION: 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.
QUESTION: 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.
, Page 2 of 237
QUESTION: 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.
QUESTION: 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.
, Page 3 of 237
QUESTION: Which of the following operations is known to result in the emission of ionizing
radiation at levels dangerous to human health?
a) Shielded 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.
QUESTION: 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.
, Page 4 of 237
QUESTION: 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
QUESTION: 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 +
QUESTION: Which welding process(es) can result in metallic inclusions in the weld?
a) SMAW.
b) FCAW.
