Type of rotors in IM

Which type of rotor does an induction motor use?

• a) Squirrel cage rotor

• b) Wound rotor

• c) Both a and b

• d) None of the above

The squirrel cage rotor is made up of:

• a) Copper conductors

• b) Aluminum conductors

• c) Iron conductors

• d) None of the above

Which of the following is a disadvantage of the squirrel cage rotor?

• a) High starting torque

• b) Low starting torque

• c) High efficiency

• d) None of the above

The wound rotor is also known as:

• a) Slip ring rotor

• b) Squirrel cage rotor

• c) Both a and b

• d) None of the above

The wound rotor provides:

• a) High starting torque

• b) Low starting torque

• c) High efficiency

• d) None of the above

In a wound rotor, the resistance of the rotor circuit is:

• a) High

• b) Low

• c) Same as the squirrel cage rotor

• d) None of the above

The slip ring rotor is used in:

• a) High starting torque applications

• b) Low starting torque applications

• c) High-speed applications

• d) None of the above

The slip ring rotor has:

• a) Low resistance

• b) High resistance

• c) Same resistance as squirrel cage rotor

• d) None of the above

Which rotor has the advantage of external resistance control?

• a) Squirrel cage rotor

• b) Slip ring rotor

• c) Both a and b

• d) None of the above

The squirrel cage rotor has:

• a) High rotor resistance

• b) Low rotor resistance

• c) Variable rotor resistance

• d) None of the above