NEBOSH Certificate in Electrical Safety: Questions & Answers

NEBOSH Certificate in Electrical Safety –
Fundamentals Practice Exam Questions AND
CORRECT ANSWERS (VERIFIED ANSWERS) Q&A
2026 |INSTANT DOWNLOAD PDF

1. What is electricity?
A. Flow of neutrons
B. Flow of electrons
C. Flow of protons
D. Flow of atoms
Correct answer: B
Rationale: Electricity is the movement of electrons through a
conductor.
2. Which factor mainly determines the severity of electric
shock?
A. Voltage only
B. Current through the body
C. Cable size
D. Equipment age
Correct answer: B
Rationale: Injury severity depends on current magnitude and
duration.
3. Which current range can be fatal?
A. 1–2 mA
B. 5–10 mA

,C. 30–50 mA
D. 0.1 mA
Correct answer: C
Rationale: Currents above ~30 mA can cause ventricular
fibrillation.
4. What is electrical resistance measured in?
A. Volts
B. Amperes
C. Ohms
D. Watts
Correct answer: C
Rationale: Resistance opposes current flow and is measured in
ohms.
5. Ohm’s Law states that:
A. P = VI
B. V = IR
C. I = PR
D. R = VP
Correct answer: B
Rationale: Voltage equals current multiplied by resistance.
6. Which material is a good electrical conductor?
A. Rubber
B. Glass
C. Copper
D. Wood

, Correct answer: C
Rationale: Metals like copper allow free electron flow.
7. Which condition increases shock risk?
A. Dry hands
B. Insulated shoes
C. Wet environment
D. Low voltage signage
Correct answer: C
Rationale: Moisture lowers body resistance.
8. What is arcing?
A. Mechanical vibration
B. Heat loss
C. Electrical discharge through air
D. Chemical reaction
Correct answer: C
Rationale: Arcing occurs when electricity jumps a gap.
9. Which injury is common from arc flash?
A. Frostbite
B. Burns
C. Fractures only
D. Eye strain only
Correct answer: B
Rationale: Arc flash produces extreme heat.
10. Static electricity is best described as:
A. Continuous current
B. Stored electrical charge