NETA Safety and PPE 3

Question 1

According to NFPA 70E, what is the minimum incident energy threshold that triggers mandatory use of arc-rated PPE?

Accepted Answer

1.2 cal/cm²

Answer

NFPA 70E defines the arc flash boundary at 1.2 cal/cm², which is the incident energy level that causes a just-curable second-degree burn and mandates arc-rated PPE.

Question 2

Which lockout/tagout step must be performed FIRST when preparing to de-energize electrical equipment?

Accepted Answer

Identify all energy sources

Answer

Identifying all energy sources (electrical, stored, mechanical) is the mandatory first step in a lockout/tagout procedure before any isolation actions.

Question 3

What type of PPE is required when working within the restricted approach boundary of exposed energized conductors?

Accepted Answer

Shock protection PPE appropriate to the voltage

Answer

The restricted approach boundary requires shock protection PPE (insulated gloves, insulated tools) appropriate to the system voltage.

Question 4

Which ASTM standard governs the performance requirements for arc-rated face protective products (face shields and hoods)?

Accepted Answer

ASTM F2178

Answer

ASTM F2178 covers the performance requirements for eye or face protective products used in electrical arc flash environments.

Question 5

A technician discovers that a ground fault has made the equipment enclosure energized at 480V. What is the correct immediate action?

Accepted Answer

De-energize the system and report before touching

Answer

An energized enclosure is an uncontrolled hazard; the technician must immediately de-energize and report before any further contact.

(NETA) InterNational Electrical Testing Association Certified Technicians Practice Test

(NETA) InterNational Electrical Testing Association Certified Technicians Practice Test

NETA Safety and PPE 3