UPDATE FAST REVIWED FROM ACTUAL TEST 100 QUESTIONS AND 100%
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1. What is the primary purpose of NFPA 70E?
A. Establish building codes
B. Provide electrical safety requirements in the workplace
C. Regulate utility companies
D. Direct OSHA inspections
B
NFPA 70E focuses on protecting workers from electrical hazards through
safe work practices.
2. Which OSHA standard contains the electrical safety requirements for
general industry?
A. Subpart C
B. Subpart S
C. Subpart L
D. Subpart H
OSHA’s Subpart S (29 CFR 1910.301-399) includes general industry electrical
safety standards.
3. What is the main goal of a lockout/tagout (LOTO) program?
A. Speed up maintenance
B. Document attendance
C. Prevent accidental release of hazardous energy
D. Reduce noise levels
LOTO protects workers from unexpected energization during servicing.
4. Which term in NFPA 70E indicates a mandatory requirement?
A. May
B. Should
C. Shall
, D. Could
“Shall” denotes mandatory action or compliance.
5. What best defines an arc flash?
A. Chemical explosion
B. Transformer noise
C. Sudden release of energy through an electric arc
D. Laser discharge
Arc flash releases intense heat, light, and pressure in a very short time.
6. The arc flash boundary is the distance at which incident energy is:
A. Below 0.5 cal/cm²
B. Equal to 2.0 cal/cm²
C. 1.2 cal/cm²
D. Zero
This is the threshold where second-degree burns may occur.
7. Which PPE is most appropriate for arc flash protection?
A. Leather gloves & glasses
B. Arc-rated clothing with face shield/hood
C. Standard work gloves
D. Hard hat only
Arc-rated clothing and face protection are required for arc flash hazards.
8. Who is responsible for providing a safe workplace under OSHA?
A. Employee
B. Manufacturer
C. Employer
D. Fire department
OSHA places the duty to protect employees on the employer.
9. What is the purpose of grounding an electrical system?
A. Increase efficiency
B. Protect personnel and provide fault current path
C. Increase voltage
, D. Reduce noise only
Grounding helps prevent shock and enables protective devices to operate.
10.A qualified person under NFPA 70E is someone who has:
A. A college degree
B. Training & authorization to work on energized parts
C. Supervision only
D. Minimum 5 years’ experience
Qualification is based on training and demonstrated knowledge.
11.What type of shock occurs when a person contacts a live conductor and
ground?
A. Step potential
B. Flashover
C. Contact shock
D. Arc blast
Contact shock results from completing a circuit through the body.
12.What is an arc blast?
A. Electromagnetic pulse
B. Rapid expansion of gases creating pressure wave
C. Static discharge
D. Low-temperature fire
Arc blasts include pressure waves that can injure workers.
13.Which boundary is closest to energized parts with high shock risk?
A. Arc flash boundary
B. Limited approach boundary
C. Restricted approach boundary
D. Safe working distance
Restricted approach boundary is closest and requires PPE and qualification.
14.What is the first step before beginning electrical work?
A. Pulling tools
B. Verify de-energized state