CWB Level 1 Welding Processes and
Equipment Exam Actual Exam 2026/2027
with Detailed Rationales | Complete
Exam-Style Questions | Pass Guaranteed –
A+ Graded
══════════════════════════════════════
SECTION 1: WELDING FUNDAMENTALS & ARC PHYSICS Q1 – Q10
══════════════════════════════════════
Question 1 of 50
A journeyman welder running a structural steel job notices that pulling the electrode slightly
farther from the joint causes the arc to widen and the voltage reading on the machine to rise,
while the amperage holds steady. The shop foreman asks the apprentice to explain what is
happening to the arc length. The apprentice should state that:
A. Increasing arc length raises arc voltage while amperage remains relatively constant on a
constant current power source. ✓ CORRECT
B. Increasing arc length raises both arc voltage and amperage proportionally on any welding
machine.
C. Increasing arc length lowers arc voltage and raises amperage because the arc resistance
drops.
D. Increasing arc length has no effect on voltage since the machine controls arc length
automatically.
Correct Answer: A
Rationale: On a constant current (drooping volt-ampere characteristic) power source, the
welder controls arc length primarily by varying arc voltage, while the machine maintains
relatively stable amperage. The most tempting wrong answer, B, confuses constant current
with constant voltage behavior where wire feed speed controls amperage. In practice, a
skilled SMAW operator uses this voltage-amperage relationship to read the puddle and adjust
bead width by manipulating arc length.
Question 2 of 50
A pipe fitter is preparing to weld a root pass on Schedule 80 carbon steel pipe using a
cellulosic electrode. The welding procedure specification (WPS) requires deep penetration
,into the pipe wall to ensure complete fusion at the land. The fitter should confirm that the
power source is set to:
A. DCEN (DC straight polarity) to minimize heat at the workpiece and prevent burn-through.
B. DCEP (DC reverse polarity) to concentrate heat at the workpiece for maximum penetration.
✓ CORRECT
C. AC output to balance heat input evenly between the electrode and the workpiece.
D. High-frequency AC superimposed on DC to stabilize the arc inside the narrow pipe joint.
Correct Answer: B
Rationale: DCEP concentrates approximately two-thirds of the arc heat at the workpiece,
producing the deep penetration required for cellulosic root passes on pipe in accordance
with typical CWB WPS requirements. The trap in A is DCEN, which concentrates heat at the
electrode and produces shallow penetration—useful for some GTAW applications but
incorrect for SMAW pipe root passes with cellulosic electrodes. Always verify polarity on the
WPS before striking an arc on pressure piping.
Question 3 of 50
A welder working on a large DC-powered submerged arc setup notices the arc wandering
toward one side of the joint when welding near the end of a 10-meter beam. The operator
suspects arc blow and asks the shop supervisor for the most effective immediate corrective
action. The supervisor recommends:
A. Switching to a larger diameter wire to increase the arc force and overpower the magnetic
field.
B. Increasing travel speed to reduce the time the arc spends in the affected magnetic zone.
C. Switching to AC output to eliminate the DC magnetic field causing the arc deflection. ✓
CORRECT
D. Increasing stick-out by 25 mm to move the arc further from the magnetic influence of the
workpiece.
Correct Answer: C
Rationale: Arc blow in DC welding is caused by unbalanced magnetic fields near the end of a
joint or at sharp corners; switching to AC eliminates the directional magnetic field and
stabilizes the arc, which is why AC is often specified for SAW on long joints. The wrong
answer D confuses arc blow with contact-tip-to-work distance issues, and increasing
stick-out actually worsens arc stability. For large structural jobs, many CWB-qualified
procedures specify AC for the final passes to avoid arc blow near plate edges.
Question 4 of 50
A welding instructor is explaining power source characteristics to a Level 1 class. The
instructor draws two curves on the board: one that drops sharply from the open-circuit
, voltage down to the working voltage as amperage increases, and another that stays nearly
flat across a wide amperage range. The instructor explains that the drooping curve is
essential for:
A. GMAW spray transfer because the wire feed speed must control the amperage
independently.
B. SAW tandem welding because two wires require perfectly matched voltages at all times.
C. GTAW manual welding because the welder needs voltage control while the torch is held
steady.
D. SMAW manual welding because the welder controls arc length by varying voltage without
amperage swinging wildly. ✓ CORRECT
Correct Answer: D
Rationale: A drooping volt-ampere characteristic (constant current) allows the SMAW
operator to change arc length—which changes arc voltage—while the power source maintains
relatively stable amperage, preventing the electrode from freezing or the arc from
extinguishing. The wrong answer A describes a flat volt-ampere characteristic (constant
voltage) used in GMAW/FCAW, where wire feed speed controls amperage. Understanding this
distinction is critical for CWB Level 1 technicians when setting up shop equipment for
different processes.
Question 5 of 50
A quality control inspector is reviewing a WPS for a multi-pass groove weld on 50 mm thick
A36 plate. The WPS specifies a heat input of 1.8 kJ/mm. The inspector checks the welder's
travel speed and finds it is 30% faster than the WPS allows. If voltage and amperage remain
unchanged, the heat input will:
A. Decrease because heat input is inversely proportional to travel speed. ✓ CORRECT
B. Increase because faster travel concentrates the arc energy into a smaller area.
C. Remain the same because heat input depends only on voltage and amperage, not travel
speed.
D. Increase because the welder must compensate with higher amperage to maintain fusion.
Correct Answer: A
Rationale: Heat input is calculated as (voltage × amperage × 60) / (travel speed × 1000), so
increasing travel speed reduces heat input, which can lead to insufficient fusion and higher
hardness in the heat-affected zone. The wrong answer C is a common trap that ignores the
travel speed denominator in the heat input formula. CWB Level 1 inspectors routinely verify
travel speed with a stopwatch during procedure qualification to ensure WPS compliance on
thick structural sections.
Question 6 of 50
Equipment Exam Actual Exam 2026/2027
with Detailed Rationales | Complete
Exam-Style Questions | Pass Guaranteed –
A+ Graded
══════════════════════════════════════
SECTION 1: WELDING FUNDAMENTALS & ARC PHYSICS Q1 – Q10
══════════════════════════════════════
Question 1 of 50
A journeyman welder running a structural steel job notices that pulling the electrode slightly
farther from the joint causes the arc to widen and the voltage reading on the machine to rise,
while the amperage holds steady. The shop foreman asks the apprentice to explain what is
happening to the arc length. The apprentice should state that:
A. Increasing arc length raises arc voltage while amperage remains relatively constant on a
constant current power source. ✓ CORRECT
B. Increasing arc length raises both arc voltage and amperage proportionally on any welding
machine.
C. Increasing arc length lowers arc voltage and raises amperage because the arc resistance
drops.
D. Increasing arc length has no effect on voltage since the machine controls arc length
automatically.
Correct Answer: A
Rationale: On a constant current (drooping volt-ampere characteristic) power source, the
welder controls arc length primarily by varying arc voltage, while the machine maintains
relatively stable amperage. The most tempting wrong answer, B, confuses constant current
with constant voltage behavior where wire feed speed controls amperage. In practice, a
skilled SMAW operator uses this voltage-amperage relationship to read the puddle and adjust
bead width by manipulating arc length.
Question 2 of 50
A pipe fitter is preparing to weld a root pass on Schedule 80 carbon steel pipe using a
cellulosic electrode. The welding procedure specification (WPS) requires deep penetration
,into the pipe wall to ensure complete fusion at the land. The fitter should confirm that the
power source is set to:
A. DCEN (DC straight polarity) to minimize heat at the workpiece and prevent burn-through.
B. DCEP (DC reverse polarity) to concentrate heat at the workpiece for maximum penetration.
✓ CORRECT
C. AC output to balance heat input evenly between the electrode and the workpiece.
D. High-frequency AC superimposed on DC to stabilize the arc inside the narrow pipe joint.
Correct Answer: B
Rationale: DCEP concentrates approximately two-thirds of the arc heat at the workpiece,
producing the deep penetration required for cellulosic root passes on pipe in accordance
with typical CWB WPS requirements. The trap in A is DCEN, which concentrates heat at the
electrode and produces shallow penetration—useful for some GTAW applications but
incorrect for SMAW pipe root passes with cellulosic electrodes. Always verify polarity on the
WPS before striking an arc on pressure piping.
Question 3 of 50
A welder working on a large DC-powered submerged arc setup notices the arc wandering
toward one side of the joint when welding near the end of a 10-meter beam. The operator
suspects arc blow and asks the shop supervisor for the most effective immediate corrective
action. The supervisor recommends:
A. Switching to a larger diameter wire to increase the arc force and overpower the magnetic
field.
B. Increasing travel speed to reduce the time the arc spends in the affected magnetic zone.
C. Switching to AC output to eliminate the DC magnetic field causing the arc deflection. ✓
CORRECT
D. Increasing stick-out by 25 mm to move the arc further from the magnetic influence of the
workpiece.
Correct Answer: C
Rationale: Arc blow in DC welding is caused by unbalanced magnetic fields near the end of a
joint or at sharp corners; switching to AC eliminates the directional magnetic field and
stabilizes the arc, which is why AC is often specified for SAW on long joints. The wrong
answer D confuses arc blow with contact-tip-to-work distance issues, and increasing
stick-out actually worsens arc stability. For large structural jobs, many CWB-qualified
procedures specify AC for the final passes to avoid arc blow near plate edges.
Question 4 of 50
A welding instructor is explaining power source characteristics to a Level 1 class. The
instructor draws two curves on the board: one that drops sharply from the open-circuit
, voltage down to the working voltage as amperage increases, and another that stays nearly
flat across a wide amperage range. The instructor explains that the drooping curve is
essential for:
A. GMAW spray transfer because the wire feed speed must control the amperage
independently.
B. SAW tandem welding because two wires require perfectly matched voltages at all times.
C. GTAW manual welding because the welder needs voltage control while the torch is held
steady.
D. SMAW manual welding because the welder controls arc length by varying voltage without
amperage swinging wildly. ✓ CORRECT
Correct Answer: D
Rationale: A drooping volt-ampere characteristic (constant current) allows the SMAW
operator to change arc length—which changes arc voltage—while the power source maintains
relatively stable amperage, preventing the electrode from freezing or the arc from
extinguishing. The wrong answer A describes a flat volt-ampere characteristic (constant
voltage) used in GMAW/FCAW, where wire feed speed controls amperage. Understanding this
distinction is critical for CWB Level 1 technicians when setting up shop equipment for
different processes.
Question 5 of 50
A quality control inspector is reviewing a WPS for a multi-pass groove weld on 50 mm thick
A36 plate. The WPS specifies a heat input of 1.8 kJ/mm. The inspector checks the welder's
travel speed and finds it is 30% faster than the WPS allows. If voltage and amperage remain
unchanged, the heat input will:
A. Decrease because heat input is inversely proportional to travel speed. ✓ CORRECT
B. Increase because faster travel concentrates the arc energy into a smaller area.
C. Remain the same because heat input depends only on voltage and amperage, not travel
speed.
D. Increase because the welder must compensate with higher amperage to maintain fusion.
Correct Answer: A
Rationale: Heat input is calculated as (voltage × amperage × 60) / (travel speed × 1000), so
increasing travel speed reduces heat input, which can lead to insufficient fusion and higher
hardness in the heat-affected zone. The wrong answer C is a common trap that ignores the
travel speed denominator in the heat input formula. CWB Level 1 inspectors routinely verify
travel speed with a stopwatch during procedure qualification to ensure WPS compliance on
thick structural sections.
Question 6 of 50
