ASP Electrical Safety 4

Question 1

What is the minimum approach distance (MAD) concept used for in electrical safety?

Accepted Answer

Determining how far a worker must stay from energized conductors based on voltage level

Answer

Minimum approach distance is the closest distance a qualified worker may approach energized conductors or circuit parts, determined by the system voltage and overvoltage category.

Question 2

Which OSHA standard primarily governs electrical safety in general industry workplaces?

Accepted Answer

29 CFR 1910.303–1910.399 (Subpart S)

Answer

OSHA 29 CFR 1910 Subpart S (sections 303–399) covers electrical safety standards for general industry workplaces.

Question 3

What does an equipotential bonding system accomplish in electrical safety?

Accepted Answer

It ensures all conductive parts are at the same electrical potential to eliminate shock hazard

Answer

Equipotential bonding connects all conductive parts together so no voltage difference exists between them, eliminating the risk of electric shock from step or touch potential.

Question 4

A worker contacts an energized conductor and cannot let go due to muscle tetany. What physiological phenomenon causes this?

Accepted Answer

Sustained muscle contraction caused by alternating current stimulating motor nerves at 60 Hz

Answer

60 Hz AC causes repeated stimulation of motor nerves, producing sustained involuntary muscle contraction (tetany) that prevents the victim from releasing the conductor.

Question 5

What is the purpose of a ground fault circuit interrupter (GFCI) compared to a standard circuit breaker?

Accepted Answer

GFCI detects small current imbalances (as low as 4–6 mA) and trips to protect against shock; breakers protect against overloads and short circuits

Answer

GFCIs monitor the difference between hot and neutral current and trip within milliseconds when as little as 4–6 mA is detected flowing through an unintended path, protecting against electrocution.

(ASP) Associate Safety Professional Practice Test

(ASP) Associate Safety Professional Practice Test

ASP Electrical Safety 4