2026 – PRACTICE QUESTIONS, VERIFIED
ANSWERS & DETAILED RATIONALES
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
Answer: B. Bowline
Rationale: The bowline forms a strong, fixed loop that will not constrict under
load, making it the universal knot for easy tie and untie applications.
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
Answer: C. The entire circuit stops functioning
Rationale: A series circuit has only one path for current flow, so an open
circuit in any component breaks the path and stops current throughout the
entire circuit.
,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
Answer: C. 10 amperes
Rationale: Ohm's Law states I = V/R, so 120 volts divided by 12 ohms equals
10 amperes.
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
Answer: B. Rated for high-temperature, dry locations inside conduit
Rationale: THHN stands for Thermoplastic High Heat-resistant Nylon-coated
and is rated for dry, high-temperature environments within conduit.
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
Answer: C. Rubber insulating gloves with leather protectors
Rationale: Rubber insulating gloves provide electrical shock protection and
must be worn with leather protectors to shield the rubber from physical
damage.
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
Answer: A. 1 foot away from the wall
Rationale: A 4:1 ratio ensures proper ladder angle for safe climbing, so a 4-
foot ladder height requires the base to be 1 foot from the supporting surface.
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
, Answer: B. Needle-nose pliers
Rationale: Needle-nose pliers have a fine tip that provides precise control for
bending small gauge wires.
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
Answer: B. 10 feet
Rationale: OSHA requires unqualified persons to maintain a minimum
approach distance of 10 feet from energized overhead power lines up to 50
kV.
9. What is the primary purpose of a circuit breaker in an electrical system?
A. To increase voltage
B. To protect conductors from overcurrent
C. To convert AC to DC
D. To measure resistance
Answer: B. To protect conductors from overcurrent
Rationale: A circuit breaker automatically opens the circuit when current
exceeds a safe level, protecting conductors from damage due to overcurrent.