LADWP ELECTRICAL CRAFT HELPER EXAM 2026 –
PRACTICE QUESTIONS, VERIFIED ANSWERS &
DETAILED RATIONALES
Question 1. Which knot is universally used for easy tie and untie applications, and never
jams or slips if properly tied?
A. Clove Hitch
B. Bowline
C. Square Knot
D. Figure Eight Knot
Correct Answer: B
Rationale: The bowline is the universal knot used for easy tie and untie applications,
and it never jams or slips if properly tied. The loop forms a strong, fixed eye at the end
of a rope that will not constrict under load. The clove hitch binds tight, the square knot
can slip with wet rope, and the figure-eight is primarily a stopper knot.
Question 2. In a series circuit, what happens when one component fails as an open
circuit?
A. The circuit continues operating at reduced voltage
B. The circuit remains fully functional
C. The entire circuit stops functioning
D. Voltage drops across each component
Correct Answer: C
,Rationale: In a series circuit, there is only one path for current flow. An open circuit in
any component breaks the current path, and current stops flowing throughout the
entire circuit. This is a fundamental concept tested frequently on basic electrical exams.
Question 3. According to Ohm's Law, what is the current in a circuit with 120 volts and
12 ohms of resistance?
A. 5 amperes
B. 8 amperes
C. 10 amperes
D. 12 amperes
Correct Answer: C
Rationale: Ohm's Law states I = V/R. Therefore, 120 volts ÷ 12 ohms = 10 amperes. This
calculation is essential for electrical craft helpers to understand circuit loading and
proper wire sizing.
Question 4. What does "THHN" insulation rating indicate about a conductor?
A. Suitable for outdoor direct burial
B. Rated for high-temperature, dry locations inside conduit
C. Intended for low-voltage signaling cable
D. Flexible cord sets only
Correct Answer: B
,Rationale: THHN (Thermoplastic High Heat-resistant Nylon-coated) is rated for dry,
high-temperature environments within conduit . It is not approved for direct burial, wet
locations, or outdoor use unless additional ratings are specified. This is one of the most
common wire types used in commercial and industrial electrical work.
Question 5. Which personal protective equipment (PPE) is required when working on or
near exposed energized electrical conductors?
A. Leather gloves only
B. Safety glasses only
C. Rubber insulating gloves with leather protectors
D. Hard hat only
Correct Answer: C
Rationale: Rubber insulating gloves provide electrical shock protection and must be
worn with leather protectors (to protect the rubber from physical damage) when
working on or near energized conductors . This is a critical safety requirement and is
heavily emphasized on electrical craft helper exams.
Question 6. The "4-to-1" ladder safety rule states that for every 4 feet of ladder height,
the base should be placed:
A. 1 foot away from the wall
B. 2 feet away from the wall
C. 3 feet away from the wall
D. 4 feet away from the wall
, Correct Answer: A
Rationale: A 4:1 ratio ensures the ladder is stable; for a 4-foot ladder height, the base
should be 1 foot from the supporting surface. This rule ensures proper angle for safe
climbing. It is a standard safety question on electrical craft helper exams.
Question 7. Which hand tool is best for bending small gauge wire with precision?
A. Lineman's pliers
B. Needle-nose pliers
C. Channel-lock pliers
D. Wire cutters
Correct Answer: B
Rationale: Needle-nose pliers have a fine tip that provides precise control for bending
small gauge wires . Lineman's pliers are used for heavier work; channel-lock pliers are
for gripping pipes or large nuts; wire cutters are for cutting, not bending.
Question 8. According to OSHA standards, what is the minimum approach distance for
unqualified persons near energized overhead power lines up to 50 kV?
A. 5 feet
B. 10 feet
C. 15 feet
D. 20 feet
Correct Answer: B
PRACTICE QUESTIONS, VERIFIED ANSWERS &
DETAILED RATIONALES
Question 1. Which knot is universally used for easy tie and untie applications, and never
jams or slips if properly tied?
A. Clove Hitch
B. Bowline
C. Square Knot
D. Figure Eight Knot
Correct Answer: B
Rationale: The bowline is the universal knot used for easy tie and untie applications,
and it never jams or slips if properly tied. The loop forms a strong, fixed eye at the end
of a rope that will not constrict under load. The clove hitch binds tight, the square knot
can slip with wet rope, and the figure-eight is primarily a stopper knot.
Question 2. In a series circuit, what happens when one component fails as an open
circuit?
A. The circuit continues operating at reduced voltage
B. The circuit remains fully functional
C. The entire circuit stops functioning
D. Voltage drops across each component
Correct Answer: C
,Rationale: In a series circuit, there is only one path for current flow. An open circuit in
any component breaks the current path, and current stops flowing throughout the
entire circuit. This is a fundamental concept tested frequently on basic electrical exams.
Question 3. According to Ohm's Law, what is the current in a circuit with 120 volts and
12 ohms of resistance?
A. 5 amperes
B. 8 amperes
C. 10 amperes
D. 12 amperes
Correct Answer: C
Rationale: Ohm's Law states I = V/R. Therefore, 120 volts ÷ 12 ohms = 10 amperes. This
calculation is essential for electrical craft helpers to understand circuit loading and
proper wire sizing.
Question 4. What does "THHN" insulation rating indicate about a conductor?
A. Suitable for outdoor direct burial
B. Rated for high-temperature, dry locations inside conduit
C. Intended for low-voltage signaling cable
D. Flexible cord sets only
Correct Answer: B
,Rationale: THHN (Thermoplastic High Heat-resistant Nylon-coated) is rated for dry,
high-temperature environments within conduit . It is not approved for direct burial, wet
locations, or outdoor use unless additional ratings are specified. This is one of the most
common wire types used in commercial and industrial electrical work.
Question 5. Which personal protective equipment (PPE) is required when working on or
near exposed energized electrical conductors?
A. Leather gloves only
B. Safety glasses only
C. Rubber insulating gloves with leather protectors
D. Hard hat only
Correct Answer: C
Rationale: Rubber insulating gloves provide electrical shock protection and must be
worn with leather protectors (to protect the rubber from physical damage) when
working on or near energized conductors . This is a critical safety requirement and is
heavily emphasized on electrical craft helper exams.
Question 6. The "4-to-1" ladder safety rule states that for every 4 feet of ladder height,
the base should be placed:
A. 1 foot away from the wall
B. 2 feet away from the wall
C. 3 feet away from the wall
D. 4 feet away from the wall
, Correct Answer: A
Rationale: A 4:1 ratio ensures the ladder is stable; for a 4-foot ladder height, the base
should be 1 foot from the supporting surface. This rule ensures proper angle for safe
climbing. It is a standard safety question on electrical craft helper exams.
Question 7. Which hand tool is best for bending small gauge wire with precision?
A. Lineman's pliers
B. Needle-nose pliers
C. Channel-lock pliers
D. Wire cutters
Correct Answer: B
Rationale: Needle-nose pliers have a fine tip that provides precise control for bending
small gauge wires . Lineman's pliers are used for heavier work; channel-lock pliers are
for gripping pipes or large nuts; wire cutters are for cutting, not bending.
Question 8. According to OSHA standards, what is the minimum approach distance for
unqualified persons near energized overhead power lines up to 50 kV?
A. 5 feet
B. 10 feet
C. 15 feet
D. 20 feet
Correct Answer: B
