WALMART MAINTENANCE Electrical Systems 4

Question 1

A fluorescent light fixture flickers intermittently. What is the MOST likely cause?

Accepted Answer

Faulty ballast or lamp

Answer

Intermittent flickering in fluorescent fixtures is most commonly caused by a failing ballast or end-of-life lamp.

Question 2

What does a power factor of 0.85 mean for an electrical load in a retail facility?

Accepted Answer

85% of apparent power is converted to useful work

Answer

A power factor of 0.85 means 85% of the apparent power (kVA) is converted into real, useful work (kW).

Question 3

Which type of motor is most commonly used for HVAC compressors in large Walmart stores?

Accepted Answer

3-phase induction motor

Answer

3-phase induction motors are standard for HVAC compressors in commercial facilities due to their efficiency and reliability.

Question 4

What is the maximum voltage drop allowed by NEC recommendations for branch circuits in commercial buildings?

Accepted Answer

3%

Answer

The NEC recommends a maximum 3% voltage drop on branch circuits to ensure proper equipment operation.

Question 5

When replacing a circuit breaker, what must be verified FIRST after installation?

Accepted Answer

All of the above must be verified

Answer

All three factors must be verified: wire gauge rating, load requirements, and panel compatibility are all critical for safe installation.

WALMART MAINTENANCE Practice Test