CWB Level 2 Exam (Latest 2026/2027
Update) 300 Questions with 100% Verified
Answers | Canadian Welding Bureau
Inspector Certification| Graded A+
Question:
What is the term for voltage measured across the output terminals of a
i,- i,- i,- i,- i,- i,- i,- i,- i,- i,- i,- i,- i,-
welding machine when no current is being drawn?
i,- i,- i,- i,- i,- i,- i,-
A. diode voltage
i,- i,-
B. operating voltage
i,- i,-
C. open circuit voltage
i,- i,- i,-
D. terminal voltage?
i,- i,-
Answer:
C. open circuit voltage
i,- i,- i,-
Question:
A 60% duty cycle means that the power supply can deliver its rated
i,- i,- i,- i,- i,- i,- i,- i,- i,- i,- i,- i,- i,-
output for: i,-
A 60% of the rated output only
i,- i,- i,- i,- i,- i,-
B. 60% over the rated output followed by 4 minutes at rest
i,- i,- i,- i,- i,- i,- i,- i,- i,- i,- i,-
,C. 6 minutes at rest followed by 4 minutes at rated output
i,- i,- i,- i,- i,- i,- i,- i,- i,- i,- i,-
D. 6 minutes at rated output followed by 4 minutes at rest?
i,- i,- i,- i,- i,- i,- i,- i,- i,- i,- i,-
Answer:
D. 6 minutes at rated output followed by 4 minutes at rest
i,- i,- i,- i,- i,- i,- i,- i,- i,- i,- i,-
Question:
One of the simplest ways of controlling the output of a welding
i,- i,- i,- i,- i,- i,- i,- i,- i,- i,- i,- i,-
transformer is to change the efficiency of coupling between the primary
i,- i,- i,- i,- i,- i,- i,- i,- i,- i,- i,-
and secondary coils. How can this be done?
i,- i,- i,- i,- i,- i,- i,-
A) slide a piece of wood between the primary and the secondary coils
i,- i,- i,- i,- i,- i,- i,- i,- i,- i,- i,- i,-
B) design the transformer with either a moving core or moving primary
i,- i,- i,- i,- i,- i,- i,- i,- i,- i,- i,- i,-
coils
C) design the transformer with a number of taps to select different output
i,- i,- i,- i,- i,- i,- i,- i,- i,- i,- i,- i,- i,-
curves
D) use the timed firing of SCR's to control total conduction time?
i,- i,- i,- i,- i,- i,- i,- i,- i,- i,- i,-
Answer:
B. design the transformer with either a moving core or moving primary
i,- i,- i,- i,- i,- i,- i,- i,- i,- i,- i,- i,-
coils
Question:
When choosing between AC and DC output;
i,- i,- i,- i,- i,- i,-
,A. the process generally determines the type of current
i,- i,- i,- i,- i,- i,- i,- i,-
B. high current output machines are always both AC/DC
i,- i,- i,- i,- i,- i,- i,- i,-
C. DC is generally used for very high output applications
i,- i,- i,- i,- i,- i,- i,- i,- i,-
D. most supplies are equipped with constant voltage/constant current
i,- i,- i,- i,- i,- i,- i,- i,- i,-
options?
Answer:
A. the process generally determines the type of current
i,- i,- i,- i,- i,- i,- i,- i,-
Question:
Which of the following metals has the lowest electrical resistivity?
i,- i,- i,- i,- i,- i,- i,- i,- i,-
A aluminum
i,-
B. tungsten
i,-
C. copper
i,-
D. iron?
i,-
Answer:
C. copper
i,-
Question:
What is the purpose of an inverter?
i,- i,- i,- i,- i,- i,-
, A. to convert AC current to DC current of the same frequency
i,- i,- i,- i,- i,- i,- i,- i,- i,- i,- i,-
B. to convert DC current to high frequency AC current
i,- i,- i,- i,- i,- i,- i,- i,- i,-
C. to convert AC current to DC current
i,- i,- i,- i,- i,- i,- i,-
D. to convert electrode positive to electrode negative?
i,- i,- i,- i,- i,- i,- i,-
Answer:
C. to convert AC current to DC current
i,- i,- i,- i,- i,- i,- i,-
Question:
In parallel electrical circuits, the voltage across each resistor is the same
i,- i,- i,- i,- i,- i,- i,- i,- i,- i,- i,- i,-
since each path is connected to the same voltage source. Select the
i,- i,- i,- i,- i,- i,- i,- i,- i,- i,- i,- i,-
correct statement. i,-
A. in each parallel path the resistance must be equalized to create equal
i,- i,- i,- i,- i,- i,- i,- i,- i,- i,- i,- i,- i,-
voltage.
B. the current flowing in each parallel path must be the same as the
i,- i,- i,- i,- i,- i,- i,- i,- i,- i,- i,- i,- i,- i,-
voltage. i,-
C. the current flowing in each parallel path depends on the resistance in
i,- i,- i,- i,- i,- i,- i,- i,- i,- i,- i,- i,- i,-
each path
i,-
D. the current flowing in each parallel path depends on the capacitance in
i,- i,- i,- i,- i,- i,- i,- i,- i,- i,- i,- i,- i,-
each path?
i,-
Answer:
C. the current flowing in each parallel path depends on the resistance in
i,- i,- i,- i,- i,- i,- i,- i,- i,- i,- i,- i,- i,-
each path
i,-
Question:
Update) 300 Questions with 100% Verified
Answers | Canadian Welding Bureau
Inspector Certification| Graded A+
Question:
What is the term for voltage measured across the output terminals of a
i,- i,- i,- i,- i,- i,- i,- i,- i,- i,- i,- i,- i,-
welding machine when no current is being drawn?
i,- i,- i,- i,- i,- i,- i,-
A. diode voltage
i,- i,-
B. operating voltage
i,- i,-
C. open circuit voltage
i,- i,- i,-
D. terminal voltage?
i,- i,-
Answer:
C. open circuit voltage
i,- i,- i,-
Question:
A 60% duty cycle means that the power supply can deliver its rated
i,- i,- i,- i,- i,- i,- i,- i,- i,- i,- i,- i,- i,-
output for: i,-
A 60% of the rated output only
i,- i,- i,- i,- i,- i,-
B. 60% over the rated output followed by 4 minutes at rest
i,- i,- i,- i,- i,- i,- i,- i,- i,- i,- i,-
,C. 6 minutes at rest followed by 4 minutes at rated output
i,- i,- i,- i,- i,- i,- i,- i,- i,- i,- i,-
D. 6 minutes at rated output followed by 4 minutes at rest?
i,- i,- i,- i,- i,- i,- i,- i,- i,- i,- i,-
Answer:
D. 6 minutes at rated output followed by 4 minutes at rest
i,- i,- i,- i,- i,- i,- i,- i,- i,- i,- i,-
Question:
One of the simplest ways of controlling the output of a welding
i,- i,- i,- i,- i,- i,- i,- i,- i,- i,- i,- i,-
transformer is to change the efficiency of coupling between the primary
i,- i,- i,- i,- i,- i,- i,- i,- i,- i,- i,-
and secondary coils. How can this be done?
i,- i,- i,- i,- i,- i,- i,-
A) slide a piece of wood between the primary and the secondary coils
i,- i,- i,- i,- i,- i,- i,- i,- i,- i,- i,- i,-
B) design the transformer with either a moving core or moving primary
i,- i,- i,- i,- i,- i,- i,- i,- i,- i,- i,- i,-
coils
C) design the transformer with a number of taps to select different output
i,- i,- i,- i,- i,- i,- i,- i,- i,- i,- i,- i,- i,-
curves
D) use the timed firing of SCR's to control total conduction time?
i,- i,- i,- i,- i,- i,- i,- i,- i,- i,- i,-
Answer:
B. design the transformer with either a moving core or moving primary
i,- i,- i,- i,- i,- i,- i,- i,- i,- i,- i,- i,-
coils
Question:
When choosing between AC and DC output;
i,- i,- i,- i,- i,- i,-
,A. the process generally determines the type of current
i,- i,- i,- i,- i,- i,- i,- i,-
B. high current output machines are always both AC/DC
i,- i,- i,- i,- i,- i,- i,- i,-
C. DC is generally used for very high output applications
i,- i,- i,- i,- i,- i,- i,- i,- i,-
D. most supplies are equipped with constant voltage/constant current
i,- i,- i,- i,- i,- i,- i,- i,- i,-
options?
Answer:
A. the process generally determines the type of current
i,- i,- i,- i,- i,- i,- i,- i,-
Question:
Which of the following metals has the lowest electrical resistivity?
i,- i,- i,- i,- i,- i,- i,- i,- i,-
A aluminum
i,-
B. tungsten
i,-
C. copper
i,-
D. iron?
i,-
Answer:
C. copper
i,-
Question:
What is the purpose of an inverter?
i,- i,- i,- i,- i,- i,-
, A. to convert AC current to DC current of the same frequency
i,- i,- i,- i,- i,- i,- i,- i,- i,- i,- i,-
B. to convert DC current to high frequency AC current
i,- i,- i,- i,- i,- i,- i,- i,- i,-
C. to convert AC current to DC current
i,- i,- i,- i,- i,- i,- i,-
D. to convert electrode positive to electrode negative?
i,- i,- i,- i,- i,- i,- i,-
Answer:
C. to convert AC current to DC current
i,- i,- i,- i,- i,- i,- i,-
Question:
In parallel electrical circuits, the voltage across each resistor is the same
i,- i,- i,- i,- i,- i,- i,- i,- i,- i,- i,- i,-
since each path is connected to the same voltage source. Select the
i,- i,- i,- i,- i,- i,- i,- i,- i,- i,- i,- i,-
correct statement. i,-
A. in each parallel path the resistance must be equalized to create equal
i,- i,- i,- i,- i,- i,- i,- i,- i,- i,- i,- i,- i,-
voltage.
B. the current flowing in each parallel path must be the same as the
i,- i,- i,- i,- i,- i,- i,- i,- i,- i,- i,- i,- i,- i,-
voltage. i,-
C. the current flowing in each parallel path depends on the resistance in
i,- i,- i,- i,- i,- i,- i,- i,- i,- i,- i,- i,- i,-
each path
i,-
D. the current flowing in each parallel path depends on the capacitance in
i,- i,- i,- i,- i,- i,- i,- i,- i,- i,- i,- i,- i,-
each path?
i,-
Answer:
C. the current flowing in each parallel path depends on the resistance in
i,- i,- i,- i,- i,- i,- i,- i,- i,- i,- i,- i,- i,-
each path
i,-
Question:
