Electrical Craft Helper Exam Prep |
COMPREHENSIVE EXAM BANK WITH ACTUAL
QUESTIONS AND CORRECT VERIFIED
ANSWERS AND WELL ELLABORATED
RATIONALES.
1. What tool is used to verify that equipment is parallel to the
ground?
A) Plumb bob
B) Level
C) Square
D) Tape measure
Correct Answer: B
Rationale: A level is used to verify that equipment is parallel
to the ground (horizontal). A plumb bob is used to verify
vertical alignment (perpendicular to the ground). Squares
are used to check right angles, and tape measures are used
for length measurements.
2. A ladder is found to have a broken rung. What is the
proper action?
A) Repair the rung with tape
B) Discard the ladder entirely
C) Use the ladder only for light work
D) Replace the broken rung
Correct Answer: B
,Rationale: A ladder with a broken rung is unsafe and should
be discarded entirely. Damaged ladders should never be
used or repaired in the field. They should be tagged out of
service and replaced.
3. When should portable electric tools and extension cords
be checked?
A) Once a week
B) At the beginning of each shift
C) Before use
D) After use
Correct Answer: C
Rationale: Portable electric tools and extension cords
should be checked before each use for signs of damage,
fraying, or other defects. This is a critical safety practice to
prevent electrical shock, fires, and equipment failure.
4. For a 20-foot extended ladder, what is the correct
distance from the base to the wall?
A) 3 feet
B) 4 feet
C) 5 feet
D) 6 feet
Correct Answer: C
Rationale: The base of an extended ladder should be placed
one-quarter of the working height from the wall. For a 20-
,foot ladder, this is 5 feet (20 ÷ 4 = 5). This provides the
proper angle (approximately 75 degrees) for safe climbing.
5. What are the three parts of a standard screwdriver?
A) Handle, shaft, and tip
B) Handle, shank, and blade
C) Grip, stem, and point
D) Handle, rod, and wedge
Correct Answer: B
Rationale: The three parts of a standard screwdriver are the
handle, shank, and blade. The handle provides grip, the
shank is the metal shaft, and the blade is the working tip
that engages the screw head.
6. What is the best tool for measuring a very long conduit
run?
A) Tape measure
B) Measuring wheel
C) Ruler
D) Laser distance measurer
Correct Answer: B
Rationale: A measuring wheel is the best tool for measuring
very long conduit runs because it can quickly and
accurately measure long distances. Tape measures are
impractical for long runs, and laser measures may not be
suitable for outdoor or rough terrain.
, 7. What is the most accurate way to measure cable
remaining on a reel?
A) Weigh the reel
B) Count the wraps
C) Read the footage indicator stamped on the cable
D) Estimate by visual inspection
Correct Answer: C
Rationale: The most accurate way to measure cable
remaining on a reel is to read the footage indicator stamped
on the cable. Many cables have markings or footage
indicators printed along their length. Weighing and counting
wraps are less accurate methods.
8. What is the best instrument to test if a 110-volt circuit is
alive?
A) Ohmmeter
B) Voltmeter connected across the line
C) Ammeter
D) Continuity tester
Correct Answer: B
Rationale: A voltmeter connected across the line (between
hot and neutral or hot and ground) is the best instrument to
test if a 110-volt circuit is alive. It measures the voltage
present. An ohmmeter measures resistance and should not
be used on live circuits.
COMPREHENSIVE EXAM BANK WITH ACTUAL
QUESTIONS AND CORRECT VERIFIED
ANSWERS AND WELL ELLABORATED
RATIONALES.
1. What tool is used to verify that equipment is parallel to the
ground?
A) Plumb bob
B) Level
C) Square
D) Tape measure
Correct Answer: B
Rationale: A level is used to verify that equipment is parallel
to the ground (horizontal). A plumb bob is used to verify
vertical alignment (perpendicular to the ground). Squares
are used to check right angles, and tape measures are used
for length measurements.
2. A ladder is found to have a broken rung. What is the
proper action?
A) Repair the rung with tape
B) Discard the ladder entirely
C) Use the ladder only for light work
D) Replace the broken rung
Correct Answer: B
,Rationale: A ladder with a broken rung is unsafe and should
be discarded entirely. Damaged ladders should never be
used or repaired in the field. They should be tagged out of
service and replaced.
3. When should portable electric tools and extension cords
be checked?
A) Once a week
B) At the beginning of each shift
C) Before use
D) After use
Correct Answer: C
Rationale: Portable electric tools and extension cords
should be checked before each use for signs of damage,
fraying, or other defects. This is a critical safety practice to
prevent electrical shock, fires, and equipment failure.
4. For a 20-foot extended ladder, what is the correct
distance from the base to the wall?
A) 3 feet
B) 4 feet
C) 5 feet
D) 6 feet
Correct Answer: C
Rationale: The base of an extended ladder should be placed
one-quarter of the working height from the wall. For a 20-
,foot ladder, this is 5 feet (20 ÷ 4 = 5). This provides the
proper angle (approximately 75 degrees) for safe climbing.
5. What are the three parts of a standard screwdriver?
A) Handle, shaft, and tip
B) Handle, shank, and blade
C) Grip, stem, and point
D) Handle, rod, and wedge
Correct Answer: B
Rationale: The three parts of a standard screwdriver are the
handle, shank, and blade. The handle provides grip, the
shank is the metal shaft, and the blade is the working tip
that engages the screw head.
6. What is the best tool for measuring a very long conduit
run?
A) Tape measure
B) Measuring wheel
C) Ruler
D) Laser distance measurer
Correct Answer: B
Rationale: A measuring wheel is the best tool for measuring
very long conduit runs because it can quickly and
accurately measure long distances. Tape measures are
impractical for long runs, and laser measures may not be
suitable for outdoor or rough terrain.
, 7. What is the most accurate way to measure cable
remaining on a reel?
A) Weigh the reel
B) Count the wraps
C) Read the footage indicator stamped on the cable
D) Estimate by visual inspection
Correct Answer: C
Rationale: The most accurate way to measure cable
remaining on a reel is to read the footage indicator stamped
on the cable. Many cables have markings or footage
indicators printed along their length. Weighing and counting
wraps are less accurate methods.
8. What is the best instrument to test if a 110-volt circuit is
alive?
A) Ohmmeter
B) Voltmeter connected across the line
C) Ammeter
D) Continuity tester
Correct Answer: B
Rationale: A voltmeter connected across the line (between
hot and neutral or hot and ground) is the best instrument to
test if a 110-volt circuit is alive. It measures the voltage
present. An ohmmeter measures resistance and should not
be used on live circuits.
