FREE Licensed Electrical Contractor Safety and OSHA Regulations Questions and Answers

Question 1

An electrician must replace a motor starter in a control panel.
The main disconnect for the panel is 50 feet away and not in the line of sight.
According to OSHA's Lockout/Tagout standard (29 CFR 1910.147), what is the first and most critical action the electrician must take?

Accepted Answer

De-energize the panel, then apply a personal lock and tag to the main disconnect.

Answer

Test the circuit for voltage at the motor starter to ensure it's off.

Answer

Notify the area supervisor that maintenance work is beginning.

Answer

Place a 'Do Not Operate' tag on the motor starter itself.

Question 2

An arc flash hazard analysis determines that an electrician must wear Category 2 PPE to work on energized 480V switchgear. Which of the following collections of PPE best meets the minimum requirements for this category as defined by NFPA 70E?

Accepted Answer

Arc-rated clothing (e.g., shirt and pants or coverall), an arc-rated face shield with a balaclava/sock hood, and a hard hat.

Answer

A full arc flash suit with hood and rubber insulating gloves with leather protectors.

Answer

Leather gloves, a standard hard hat, and standard safety glasses.

Answer

A standard cotton long-sleeve shirt and non-safety glasses.

Question 3

A contractor on a construction site opts to use an Assured Equipment Grounding Conductor Program (AEGCP) instead of GFCIs for temporary 120-volt receptacle outlets. Which of the following is a mandatory component of this OSHA-compliant program?

Accepted Answer

A written description of the program must be kept at the jobsite and be available to OSHA.

Answer

All cord sets must be visually inspected once per month.

Answer

Equipment grounding conductors must be tested for continuity every six months.

Answer

Only newly purchased equipment is covered under the program.

Question 4

An electrician uses a 24-foot extension ladder to access a junction box on a building wall. The point of contact with the wall is 18 feet above the ground. According to OSHA safety regulations (29 CFR 1926 Subpart X), what is the minimum distance the side rails of the ladder must extend above the roofline or landing surface?

Accepted Answer

3 feet

Answer

1 foot

Answer

2 feet

Answer

4 feet

Question 5

According to OSHA and NFPA 70E standards, working on energized electrical equipment is generally prohibited. Under which of the following conditions is performing energized work most likely to be justified?

Accepted Answer

The task involves troubleshooting or diagnostics that are impossible to perform on a de-energized circuit.

Answer

The client has requested the work be done 'hot' to avoid paying for a shutdown.

Answer

Shutting down the power would be inconvenient and cause a minor loss of production.

Answer

The correct Lockout/Tagout devices are not immediately available on the job site.

Question 6

An electrical crew is tasked with installing underground conduit in a trench that is 6 feet deep. Per OSHA regulations for excavations (29 CFR 1926 Subpart P), what is required before any worker is permitted to enter the trench?

Accepted Answer

A protective system, such as sloping, shoring, or a trench shield (trench box), must be in place.

Answer

The trench must be at least 4 feet wide at the bottom to ensure stability.

Answer

A ladder or other safe means of egress must be placed every 50 feet of lateral travel.

Answer

All workers entering the trench must be attached to a personal fall arrest system.

An electrician must replace a motor starter in a control panel.The main disconnect for the panel is 50 feet away and not in the line of sight.According to OSHA's Lockout/Tagout standard (29 CFR 1910.147), what is the first and most critical action the electrician must take?

An electrician must replace a motor starter in a control panel.
The main disconnect for the panel is 50 feet away and not in the line of sight.
According to OSHA's Lockout/Tagout standard (29 CFR 1910.147), what is the first and most critical action the electrician must take?