WALMART MAINTENANCE Electrical Systems 5

Question 1

An emergency exit light fails its monthly test. After replacing the battery, the light still does not illuminate. What is the next diagnostic step?

Accepted Answer

Test the charging circuit voltage output

Answer

After a battery replacement, testing the charging circuit ensures the new battery will charge properly and sustain future operation.

Question 2

What is the purpose of a soft-starter on a large electric motor in a retail facility?

Accepted Answer

Limit inrush current during motor startup

Answer

A soft-starter gradually ramps up voltage to the motor, limiting inrush current during startup and reducing mechanical stress.

Question 3

When testing a 240V single-phase circuit with a multimeter, what reading should you expect between the two hot legs?

Accepted Answer

240V

Answer

A 240V single-phase circuit has two 120V hot legs that are 180 degrees out of phase, producing 240V between them.

Question 4

Which condition would cause a thermal overload relay to trip a motor circuit?

Accepted Answer

Motor drawing excessive current due to mechanical overload

Answer

Thermal overload relays trip when the motor draws excessive current over time, typically caused by mechanical overloading of the motor.

Question 5

In a store's electrical panel, what does a 'double-pole' breaker control?

Accepted Answer

A single 240V circuit

Answer

A double-pole breaker occupies two slots and controls a single 240V circuit by switching both hot legs simultaneously.

WALMART MAINTENANCE Practice Test