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

Setting the maximum length of extension cords permitted on a job site

Answer

Establishing the required distance between electrical panels and fire extinguishers

Answer

Defining the spacing between circuit breakers in a panelboard

Question 2

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

Accepted Answer

29 CFR 1910.303–1910.399 (Subpart S)

Answer

29 CFR 1910.147

Answer

29 CFR 1926.416

Answer

29 CFR 1910.132

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

It increases current capacity of conductors

Answer

It provides a path for fault current to flow to the load

Answer

It isolates high-voltage equipment from low-voltage systems

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

The body's natural grounding response

Answer

Ventricular fibrillation affecting motor neurons

Answer

Thermal burns to tendons causing mechanical contraction

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

GFCI protects equipment from overloads; breakers protect people from shock

Answer

GFCI provides surge protection; breakers provide ground fault protection

Answer

GFCI is rated for higher voltages than standard breakers

Question 6

Under NFPA 70E, an 'electrically safe work condition' requires which sequence of steps?

Accepted Answer

De-energize, verify absence of voltage, apply locks and tags, then test for absence of stored energy

Answer

Apply PPE, de-energize, verify with a voltmeter, then begin work

Answer

Identify the circuit, apply warning tags, test voltage, then de-energize

Answer

Lock out the main breaker, post a safety sign, and notify supervision

Question 7

Which factor most significantly determines the severity of an electric shock injury?

Accepted Answer

The magnitude of current flowing through the body and the path it takes

Answer

The color of the insulation on the wire

Answer

The ambient temperature of the work environment

Answer

The brand of PPE worn by the worker