AC Induction Motor Quiz

What is the stationary part of an AC induction motor called?

• Rotor

• Stator

• Fan

• Slip ring

What type of rotor has short-circuited conductors?

• Slip ring rotor

• Wound rotor

• Squirrel-cage rotor

• Fan rotor

What does the TEFC motor use for cooling?

• Oil

• Water

• External fan

• No fan

What is the purpose of slip in an AC induction motor?

• To cool the motor

• To stop the motor

• To induce current

• To increase speed

What type of motor has no external fan and relies on radiation for cooling?

• TEFC

• TENV

• TEAO

• ODP

What is created when AC is applied to the stator windings?

• Rotating magnetic field

• Static field

• Electric current

• Heat

What type of rotor is used for special purposes involving speed control?

• Guarded rotor

• Open frame rotor

• Wound rotor

• Squirrel-cage rotor

What is the main function of the rotor in an AC induction motor?

• To generate electricity

• To rotate and produce torque

• To cool the motor

• To hold the motor in place

What type of motor is designed to operate in the airstream created by a fan?

• TEFC

• Splash-proof

• TENV

• TEAO

What happens to the rotor speed in relation to the synchronous speed?

• It matches exactly

• It is always higher

• It is always lower

• It varies with load