7/11/25, 11:11 PM
CWB Level 2 Study Modules 4-5-6-7-8-9-12-17-18-19-22 ACTUAL TEST
BANK EXAM 2025-2026 \COMPLETE QUESTIONS AND CORRECT
DETAILED ANSWERS \VERIFIED ANSWERS \ALREADY GRADED A+
||ASSURED PASS
How is power flow analyzed C. average current in an AC circuit is zero and therefore no work
in alternating current is done
circuits?
A. AC circuits can be
evaluated the same as DC
circuits when RMS values
of voltage and current are
used
B. when analysing AC circuits,
inductive and capacitive
reactance must be
included
C. average current in an AC
circuit is zero and
therefore no work is
done
D. the peaks and valleys
of sine wave curves
balance to zero with
the load
Which of the following D. taps on the secondary of the transformer
methods is commonly used
to control the output of a
transformer?
A. an auxiliary power supply
which feeds the
secondary as required
B. a saturable reactor in
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,7/11/25, 11:11 PM
series with the output
C. resistance placed in
parallel with the primary
of the transformer
D. taps on the
secondary of the
transformer
A transformer type welding B. alternating current
power source without a
rectifier outputs what type
of current?
A. direct current
B. alternating current
C. high frequency current
D. pulsed direct current
When gas tungsten arc B. electrode negative
welding steels electrode
polarity is most commonly;
A. electrode positive
B. electrode negative
C. alternating current
D. electrode square wave
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,7/11/25, 11:11 PM
A disadvantage of SCR A. the output is smoothed out by the addition of capacitor
control is that the output is
very 'choppy'. How is the
output made more
suitable for welding?
A. the output is
smoothed out by the
addition of capacitors
B. the large inductor or
choke will be added to
the circuit
C. the output from an
SCR bridge is smooth
enough for welding
purposes
D. the diodes added to all
SCR controlled machines
to prevent "choppy"
output
Gas tungsten arc and plasma B. outputs high voltage, low current to create and
arc welding power sources maintain a stable conductive path for the flow of
are commonly designed power
with high frequency units.
What does the high
frequency unit do?
A. increases heat input
due to the increased
frequency which increases
the total time
at high current flow
B. outputs high voltage,
low current to create and
maintain a stable
conductive path for the
flow of power
C. decreases the cleaning
action created by electrode
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, 7/11/25, 11:11 PM
negative polarity present
in alternating current
arcs
D. outputs balanced current
flow between electrode
positive and electrode
negative half cycles
Gases are not normally A. requires high voltage
electrically conductive. To
start an arc;
A. requires high voltage
B. requires high
inductance 'C.
requires high
current
D. requires AC power
What voltage is required to A. 110 volts
cause 5 amps of current to
flow through a resistance
of 22 ohms?
A. 110 volts
B. 0.22 volts
C. 4.4 volts
D. 5 volts
What type of output is E. constant current
usually required for Gas
Tungsten Arc Welding?
A. constant voltage
B. high frequency
C. low power factor
D. low duty cycle
E. constant current
4/113
CWB Level 2 Study Modules 4-5-6-7-8-9-12-17-18-19-22 ACTUAL TEST
BANK EXAM 2025-2026 \COMPLETE QUESTIONS AND CORRECT
DETAILED ANSWERS \VERIFIED ANSWERS \ALREADY GRADED A+
||ASSURED PASS
How is power flow analyzed C. average current in an AC circuit is zero and therefore no work
in alternating current is done
circuits?
A. AC circuits can be
evaluated the same as DC
circuits when RMS values
of voltage and current are
used
B. when analysing AC circuits,
inductive and capacitive
reactance must be
included
C. average current in an AC
circuit is zero and
therefore no work is
done
D. the peaks and valleys
of sine wave curves
balance to zero with
the load
Which of the following D. taps on the secondary of the transformer
methods is commonly used
to control the output of a
transformer?
A. an auxiliary power supply
which feeds the
secondary as required
B. a saturable reactor in
1/113
,7/11/25, 11:11 PM
series with the output
C. resistance placed in
parallel with the primary
of the transformer
D. taps on the
secondary of the
transformer
A transformer type welding B. alternating current
power source without a
rectifier outputs what type
of current?
A. direct current
B. alternating current
C. high frequency current
D. pulsed direct current
When gas tungsten arc B. electrode negative
welding steels electrode
polarity is most commonly;
A. electrode positive
B. electrode negative
C. alternating current
D. electrode square wave
2/113
,7/11/25, 11:11 PM
A disadvantage of SCR A. the output is smoothed out by the addition of capacitor
control is that the output is
very 'choppy'. How is the
output made more
suitable for welding?
A. the output is
smoothed out by the
addition of capacitors
B. the large inductor or
choke will be added to
the circuit
C. the output from an
SCR bridge is smooth
enough for welding
purposes
D. the diodes added to all
SCR controlled machines
to prevent "choppy"
output
Gas tungsten arc and plasma B. outputs high voltage, low current to create and
arc welding power sources maintain a stable conductive path for the flow of
are commonly designed power
with high frequency units.
What does the high
frequency unit do?
A. increases heat input
due to the increased
frequency which increases
the total time
at high current flow
B. outputs high voltage,
low current to create and
maintain a stable
conductive path for the
flow of power
C. decreases the cleaning
action created by electrode
3/113
, 7/11/25, 11:11 PM
negative polarity present
in alternating current
arcs
D. outputs balanced current
flow between electrode
positive and electrode
negative half cycles
Gases are not normally A. requires high voltage
electrically conductive. To
start an arc;
A. requires high voltage
B. requires high
inductance 'C.
requires high
current
D. requires AC power
What voltage is required to A. 110 volts
cause 5 amps of current to
flow through a resistance
of 22 ohms?
A. 110 volts
B. 0.22 volts
C. 4.4 volts
D. 5 volts
What type of output is E. constant current
usually required for Gas
Tungsten Arc Welding?
A. constant voltage
B. high frequency
C. low power factor
D. low duty cycle
E. constant current
4/113
