AC Three Phase Motor MCQ with Answers

Short circuit

Open circuit

Over current

Under voltage

Rotor speed reduces

Rotor speed increases

Rotor speed remains same

Rotor bars get damaged

Motor does not start

Over heating in motor

Excess vibration of shaft

Motor runs with very low speed

Improper earthing

Over loading of motor

Heavy voltage fluctuation

Poor insulation in winding

Motor runs and stop immediately

Motor runs in slow speed continuously

Motor runs and draws more current

Motor continues to run with irregular speed