CME Safety Protocols & Hazard Prevention 3

Question 1

What does the acronym 'SDS' stand for in the context of hazardous material safety?

Accepted Answer

Safety Data Sheet

Answer

SDS (Safety Data Sheet) replaced the MSDS format under OSHA's HazCom 2012/GHS alignment.

Question 2

Which NFPA 70E requirement must be completed before energized electrical work is permitted?

Accepted Answer

Completing an energized electrical work permit

Answer

NFPA 70E requires an energized electrical work permit signed by authorized management before performing live electrical work.

Question 3

What is the purpose of an equipment grounding conductor (EGC) in a branch circuit?

Accepted Answer

Provide a low-impedance fault path to trip overcurrent protection

Answer

The EGC provides a low-impedance return path for fault current, causing the overcurrent device to open and clear the fault.

Question 4

A worker discovers a damaged insulated tool with a cracked handle on site. What is the correct action?

Accepted Answer

Tag it out of service and remove it from the work area

Answer

Damaged insulated tools must be immediately removed from service and tagged out to prevent unintentional use.

Question 5

Under NEC Article 110.26, what is the minimum working space depth in front of a 480V panelboard with exposed live parts on both sides?

Accepted Answer

4 feet

Answer

Condition 3 (live parts on both sides) at 151–600V requires a minimum working space depth of 4 feet per NEC 110.26.

(CME) Certified Master Electrician Practice Test