NSC NSC Electrical Safety

Question 1

What is the minimum approach distance for an unqualified worker near exposed electrical parts operating at 50 volts or greater?

Accepted Answer

At least 10 feet

Answer

OSHA 1910.333 requires unqualified workers to maintain at least a 10-foot distance from exposed energized electrical parts at 50 volts or greater.

Question 2

According to the NSC, which of the following is the most common cause of electrical injuries in the workplace?

Accepted Answer

Contact with overhead power lines

Answer

Contact with overhead power lines is the leading cause of electrical fatalities in the workplace, particularly in construction.

Question 3

What does GFCI stand for in electrical safety?

Accepted Answer

Ground Fault Circuit Interrupter

Answer

GFCI stands for Ground Fault Circuit Interrupter, a device that shuts off power when it detects a ground fault to prevent electrocution.

Question 4

Which OSHA standard covers electrical safety requirements for general industry workplaces?

Accepted Answer

29 CFR 1910.303–1910.399

Answer

OSHA 29 CFR 1910.303–1910.399 covers electrical safety design and work practice requirements for general industry.

Question 5

What is the purpose of an Arc Flash Risk Assessment in the workplace?

Accepted Answer

To identify the incident energy levels of electrical equipment and determine required PPE

Answer

An arc flash risk assessment determines the energy level of potential arc flash events and the appropriate PPE category required.

NSC Practice Test