TN LLE Electrical Safety Practices 2

Question 1

Per OSHA 1910.333, what is the minimum approach distance for an unqualified person near exposed energized parts at 300 volts to ground?

Accepted Answer

10 feet

Answer

OSHA 1910.333(c)(3) Table S-5 specifies that unqualified persons must maintain at least 10 feet from exposed energized parts operating at 300V to 750V.

Question 2

What is the primary purpose of an energized electrical work permit per NFPA 70E?

Accepted Answer

To formally evaluate the hazard and justify why de-energizing is infeasible

Answer

An energized electrical work permit per NFPA 70E 130.2 documents the justification for not de-energizing and ensures proper safety measures are in place.

Question 3

What does the term 'lockout/tagout' (LOTO) refer to in electrical safety?

Accepted Answer

Applying a physical lock and warning tag to energy-isolating devices to prevent re-energization

Answer

LOTO involves physically locking energy-isolating devices in the off position and attaching a warning tag to prevent accidental re-energization during maintenance.

Question 4

Per NFPA 70E, what must be done to verify an electrically safe work condition after de-energizing equipment?

Accepted Answer

Test with a voltmeter to verify absence of voltage

Answer

NFPA 70E requires testing each conductor with an adequately rated voltage detector to verify absence of voltage before establishing an electrically safe work condition.

Question 5

What class of fire extinguisher is required for electrical fires?

Accepted Answer

Class C

Answer

Class C fire extinguishers are rated for fires involving energized electrical equipment. The extinguishing agent is non-conductive.

TN LLE - Tennessee Limited Licensed Electrician Practice Test

TN LLE - Tennessee Limited Licensed Electrician Practice Test

TN LLE Electrical Safety Practices 2