ELECTRICAL HAZARD MANAGEMENT A COMPREHENSIVE
REVIEW OF SAFETY PRACTICES, RISK PREVENTION, AND
REGULATORY COMPLIANCE QUESTIONS WITH VERIFIED
ANSWERS
1. What is the primary cause of most electrical workplace fatalities?
A) Burns from arc flashes
B) Electrocution from direct contact
C) Explosions from faulty equipment
D) Falls caused by electric shock
Correct Answer: B – Electrocution (fatal electric shock) is the leading cause of
electrical fatalities, often from direct contact with live parts.
2. Which of the following is considered a high-risk electrical hazard due to its
explosive energy release?
A) Static discharge
B) Arc flash
C) Inductive coupling
D) Resistance heating
Correct Answer: B – An arc flash releases intense heat and pressure, causing
severe burns, blast injuries, and flying debris.
3. What is the minimum approach distance for an unqualified person near
overhead power lines up to 50 kV?
A) 5 feet
B) 10 feet
C) 15 feet
D) 20 feet
,Correct Answer: B – OSHA requires unqualified persons to stay at least 10 feet
away from overhead lines up to 50 kV.
4. Which device is designed to protect against ground faults by interrupting the
circuit within milliseconds?
A) Fuse
B) Circuit breaker
C) GFCI
D) Surge protector
Correct Answer: C – A Ground Fault Circuit Interrupter (GFCI) trips rapidly when it
detects a leakage current to ground.
5. What does the “E” in the SMART goal framework for electrical safety stand
for?
A) Energy
B) Evaluation
C) Elimination
D) Emergency
Correct Answer: A – SMART stands for Specific, Measurable, Achievable, Relevant,
and Time-bound, but in electrical safety, "E" often refers to Energy control
(Lockout/Tagout).
6. Which class of fire extinguisher is suitable for electrical fires?
A) Class A
B) Class B
C) Class C
D) Class D
Correct Answer: C – Class C extinguishers are rated for energized electrical
equipment fires.
,7. What is the effect of a current of 100–200 mA passing through the human
body?
A) Mild tingling
B) Muscle paralysis and respiratory arrest
C) Ventricular fibrillation
D) Minor pain
Correct Answer: B – Currents between 100–200 mA can cause respiratory arrest
and muscle clamping, often making it impossible to let go.
8. Which standard is the primary reference for electrical safety in the workplace
in the United States?
A) IEC 60950
B) NFPA 70E
C) ISO 13849
D) ANSI Z10
Correct Answer: B – NFPA 70E provides guidelines for electrical safety in the
workplace, including risk assessments and PPE.
9. What is the first step in the electrical risk assessment process?
A) Select PPE
B) Identify hazards
C) Implement controls
D) Review the incident history
Correct Answer: B – Identifying all potential electrical hazards is the foundational
step before analyzing or controlling risks.
10. What type of hazard is caused by the sudden release of stored electrical
energy in capacitors?
A) Arc blast
B) Thermal burns
, C) Shock
D) Stored energy discharge
Correct Answer: D – Capacitors can retain dangerous charges even after de-
energization, posing a shock or burn hazard.
11. Which of the following is NOT an element of a typical Lockout/Tagout
program?
A) Energy isolation
B) Device labeling
C) Voltage testing
D) Continuous power monitoring
Correct Answer: D – LOTO involves isolation, tagging, and testing, but not
continuous monitoring of power.
12. What is the minimum insulation resistance for a 480V motor winding
according to general guidelines?
A) 1 megohm
B) 2 megohms
C) 5 megohms
D) 10 megohms
Correct Answer: C – A common rule is 1 megohm per 1000V plus 1, so for 480V, 5
megohms is a typical minimum.
13. Which type of electrical hazard is most often associated with wet
conditions?
A) Arc flash
B) Static electricity
C) Ground fault
D) Overload
REVIEW OF SAFETY PRACTICES, RISK PREVENTION, AND
REGULATORY COMPLIANCE QUESTIONS WITH VERIFIED
ANSWERS
1. What is the primary cause of most electrical workplace fatalities?
A) Burns from arc flashes
B) Electrocution from direct contact
C) Explosions from faulty equipment
D) Falls caused by electric shock
Correct Answer: B – Electrocution (fatal electric shock) is the leading cause of
electrical fatalities, often from direct contact with live parts.
2. Which of the following is considered a high-risk electrical hazard due to its
explosive energy release?
A) Static discharge
B) Arc flash
C) Inductive coupling
D) Resistance heating
Correct Answer: B – An arc flash releases intense heat and pressure, causing
severe burns, blast injuries, and flying debris.
3. What is the minimum approach distance for an unqualified person near
overhead power lines up to 50 kV?
A) 5 feet
B) 10 feet
C) 15 feet
D) 20 feet
,Correct Answer: B – OSHA requires unqualified persons to stay at least 10 feet
away from overhead lines up to 50 kV.
4. Which device is designed to protect against ground faults by interrupting the
circuit within milliseconds?
A) Fuse
B) Circuit breaker
C) GFCI
D) Surge protector
Correct Answer: C – A Ground Fault Circuit Interrupter (GFCI) trips rapidly when it
detects a leakage current to ground.
5. What does the “E” in the SMART goal framework for electrical safety stand
for?
A) Energy
B) Evaluation
C) Elimination
D) Emergency
Correct Answer: A – SMART stands for Specific, Measurable, Achievable, Relevant,
and Time-bound, but in electrical safety, "E" often refers to Energy control
(Lockout/Tagout).
6. Which class of fire extinguisher is suitable for electrical fires?
A) Class A
B) Class B
C) Class C
D) Class D
Correct Answer: C – Class C extinguishers are rated for energized electrical
equipment fires.
,7. What is the effect of a current of 100–200 mA passing through the human
body?
A) Mild tingling
B) Muscle paralysis and respiratory arrest
C) Ventricular fibrillation
D) Minor pain
Correct Answer: B – Currents between 100–200 mA can cause respiratory arrest
and muscle clamping, often making it impossible to let go.
8. Which standard is the primary reference for electrical safety in the workplace
in the United States?
A) IEC 60950
B) NFPA 70E
C) ISO 13849
D) ANSI Z10
Correct Answer: B – NFPA 70E provides guidelines for electrical safety in the
workplace, including risk assessments and PPE.
9. What is the first step in the electrical risk assessment process?
A) Select PPE
B) Identify hazards
C) Implement controls
D) Review the incident history
Correct Answer: B – Identifying all potential electrical hazards is the foundational
step before analyzing or controlling risks.
10. What type of hazard is caused by the sudden release of stored electrical
energy in capacitors?
A) Arc blast
B) Thermal burns
, C) Shock
D) Stored energy discharge
Correct Answer: D – Capacitors can retain dangerous charges even after de-
energization, posing a shock or burn hazard.
11. Which of the following is NOT an element of a typical Lockout/Tagout
program?
A) Energy isolation
B) Device labeling
C) Voltage testing
D) Continuous power monitoring
Correct Answer: D – LOTO involves isolation, tagging, and testing, but not
continuous monitoring of power.
12. What is the minimum insulation resistance for a 480V motor winding
according to general guidelines?
A) 1 megohm
B) 2 megohms
C) 5 megohms
D) 10 megohms
Correct Answer: C – A common rule is 1 megohm per 1000V plus 1, so for 480V, 5
megohms is a typical minimum.
13. Which type of electrical hazard is most often associated with wet
conditions?
A) Arc flash
B) Static electricity
C) Ground fault
D) Overload
