CPM CPM - Certified Plant Mechanic Electrical Systems and Controls

Question 1

What does NEC stand for in the context of US industrial electrical work?

Accepted Answer

National Electrical Code

Answer

National Equipment Code

Answer

Network Electrical Circuit

Answer

Nominal Energy Capacity

Question 2

Which wire color designates a ground conductor in standard US wiring?

Accepted Answer

Green or bare copper

Answer

White

Answer

Black

Answer

Red

Question 3

What device protects a motor from damage caused by sustained overload currents?

Accepted Answer

Overload relay

Answer

Circuit breaker

Answer

Fuse

Answer

Contactor

Question 4

What is the primary purpose of a GFCI outlet in an industrial plant environment?

Accepted Answer

Protect against ground fault electric shock

Answer

Regulate voltage fluctuations

Answer

Filter harmonic distortion

Answer

Reduce power factor

Question 5

What condition results when a 3-phase motor loses one of its supply phases while running?

Accepted Answer

Single phasing occurs causing overheating

Answer

Motor runs faster

Answer

Motor reverses direction

Answer

Motor enters standby mode

Question 6

What unit is used to measure electrical resistance in a circuit?

Accepted Answer

Ohm

Answer

Ampere

Answer

Volt

Answer

Watt