Licensed Electrical Contractor OSHA Safety Standards Questions and Answers

Question 1

An electrician is preparing to perform maintenance on a permanently installed industrial machine. After shutting down the equipment using the normal stopping procedure, what is the next critical step required by the OSHA Lockout/Tagout standard (29 CFR 1910.147) before applying a lock?

Accepted Answer

Locate and operate the energy isolating device(s) to isolate the machine from its energy source.

Answer

According to the sequence in OSHA 29 CFR 1910.147, after the machine is shut down by normal means, the next step is to locate and operate all energy isolating devices (e.g., disconnect switches, circuit breakers) to ensure the equipment is completely isolated from its energy source(s) before a lock can be applied. Verification of de-energization occurs after the lock and tag are applied.

Question 2

On a construction site, an electrical contractor opts to implement an Assured Equipment Grounding Conductor Program (AEGCP) as an alternative to using GFCIs. According to OSHA 29 CFR 1926.404, which of the following is a mandatory component of this program?

Accepted Answer

A written description of the program must be kept at the jobsite, and specific equipment tests must be performed at regular intervals.

Answer

OSHA standard 29 CFR 1926.404(b)(1)(iii) requires that an AEGCP must include a written program description available at the jobsite, the designation of competent persons to implement it, and specific, documented tests (continuity and terminal connection) on equipment at required intervals, such as before first use and every 3 months.

Question 3

According to OSHA 29 CFR 1926.416, work on or near energized electrical circuits is generally prohibited. Energized work is only permitted under specific conditions, such as when:

Accepted Answer

de-energizing the circuit is infeasible or would introduce additional or increased hazards.

Answer

OSHA's standards, including 29 CFR 1926.416, and the widely referenced NFPA 70E, strictly limit work on energized equipment. The primary justification for performing energized work is if the employer can demonstrate that de-energizing is infeasible due to equipment design or operational limitations, or if it creates a greater hazard than working energized (e.g., shutting down life-support systems). Inconvenience or project delays are not acceptable reasons.

Question 4

An electrical contractor is tasked with running conduit on the exterior of a building, and a 25 kV overhead power line is present. According to OSHA's standards for equipment operation near power lines (29 CFR 1926.1408), what is the mandatory minimum approach distance that must be maintained from the line?

Accepted Answer

10 feet

Answer

According to OSHA 29 CFR 1926.1408, Table A, the minimum approach distance for voltages up to 50 kV is 10 feet. This is the absolute minimum clearance that any part of the equipment, load, or personnel may breach unless the power line is de-energized or specific, more stringent precautions are taken.

Question 5

An electrician is using an 8-foot A-frame stepladder to install a smoke detector. According to OSHA safety standards for ladders (29 CFR 1926 Subpart X), which of the following actions is a direct violation?

Accepted Answer

Standing on the ladder's top step to reach the ceiling.

Answer

OSHA standard 29 CFR 1926.1053(b)(13) explicitly states that the top or top step of a stepladder shall not be used as a step. This practice makes the ladder extremely unstable and is a common cause of falls. The other options are all required safe practices for ladder use.

Licensed Electrical Contractor Practice Test

Licensed Electrical Contractor Practice Test

Licensed Electrical Contractor OSHA Safety Standards Questions and Answers