Three phase IM

The speed of an induction motor is determined by:

• A) Stator frequency

• B) Rotor frequency

• C) Both A and B

• D) None of the above

The rotor of an induction motor is made of:

• A) Copper

• B) Aluminum

• C) Steel

• D) Iron

The direction of rotation of an induction motor can be reversed by:

• A) Reversing the stator connections

• B) Reversing the rotor connections

• C) Interchanging any two stator phases

• D) Interchanging any two rotor phases

The slip of an induction motor:

• A) Increases with increase in load

• B) Decreases with increase in load

• C) Remains constant with increase in load

• D) None of the above

The power factor of an induction motor is generally:

• A) High

• B) Low

• C) Unity

• D) None of the above

The efficiency of an induction motor is maximum at:

• A) Full load

• B) Half load

• C) One-fourth load

• D) None of the above

The squirrel cage induction motor is used for:

• A) High starting torque

• B) High speed applications

• C) Both A and B

• D) None of the above

The starting torque of an induction motor is:

• A) High

• B) Low

• C) Moderate

• D) None of the above

The no-load current drawn by an induction motor is:

• A) High

• B) Low

• C) Moderate

• D) None of the above

The rated voltage of an induction motor is usually:

• A) 220 V

• B) 440 V

• C) 660 V

• D) None of the above