Quiz sheet for three phase induction motor construction

How many slip rings would you expect to find on the shaft of a squirrel cage motor?

A) None

B) Two

C) Three

D) Four

ANSWER: A

Interchanging two connections on the slip rings of a wound rotor motor would 

A) have no effect on the motor

B) reverse the direction of rotation

C) cause overheating

D) prevent the motor from starting

ANSWER: A

The stator core is laminated to 

A) reduce eddy currents

B) reduce hysteresis 

C) provide silent runnning

D) improve starting torque

ANSWER: A

The voltage across each phase of a star-connected three-phase motor is on the nominal Australian supply is 

A) 230 volts

B) 400 Volts

C) 200 Votls

D) 692 Volts

ANSWER: A

The voltage across each winding of a 400 volt three phase motor connected in delta is 

A) 400 Volts

B) 230 Volts

C) 692 Volts

D) 200 Volts

ANSWER: A

To reduce noise and vibration rotor bars are 

A) Skewed

B) made form cast aluminum

C) star connected

D) lined up with stator slots

ANSWER: A

To reverse the direction of rotation of a three phase squirrel cage motor you would

A) interchange any two supply leads

B) disconnect and reverse the slip ring connections

C) replace the squirrel cage with a wound rotor

D) change the delta connection to a star connection

ANSWER: A

Last modified: Friday, 28 May 2021, 6:13 PM