For driving high inertia loads best type of induction motor suggested is_____________?

Related Mcqs:

1. Slip ring motor is preferred over squirrel cage induction motor where___________?

   A. high starting torque is required
   B. load torque is heavy
   C. heavy pull out torque is required
   D. all of the above

2. Size of a high speed motor as compared to low speed motor for the same H.P. will be__________?

   A. bigger
   B. smaller
   C. same
   D. any of the above

3. In case the air gap in an induction motor is increased?

   A. the magnetising current of the rotor will decrease
   B. the power factor will decrease
   C. speed of motor will increase
   D. the windage losses will increase

4. The shaft of an induction motor is made of_____________?

   A. high speed steel
   B. stainless steel
   C. carbon steel
   D. cast iron

5. A double squirrel-cage induction motor has______________?

   A. two rotors moving in oppsite direction
   B. two parallel windings in stator
   C. two parallel windings in rotor
   D. two series windings in stator

6. When the equivalent circuit diagram of doouble squirrel-cage induction motor is constructed the two cages can be considered__________?

   A. in series
   B. in parallel
   C. in series-parallel
   D. in parallel with stator

7. The ‘crawling” in an induction motor is caused by___________?

   A. high loads
   B. low voltage supply
   C. improper design of machine
   D. harmonics developed in the motor

8. A 3-phase induction motor stator delta connected, is carrying full load and one of its fuses blows out. Then the motor_______________?

   A. will continue running burning its one phase
   B. will continue running burning its two phases
   C. will stop and carry heavy current causing permanent damage to its winding
   D. will continue running without any harm to the winding

9. The starting torque of a 3-phase squirrel cage induction motor is____________?

   A. twice the full load torque
   B. 1.5 times the full load torque
   C. equal to full load torque

10. Temperature of the stator winding of a three phase induction motor is obtained by___________?

    A. resistance rise method
    B. thermometer method
    C. embedded temperature method
    D. all above methods