The stating torque of the slip ring induction motor can be increased by adding__________?

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. The shape of the torque/slip curve of induction motor is__________?

   A. parabola B. hyperbola C. rectangular parabola D. straigth line...

3. The starting torque of a three phase induction motor can be increased by__________?

   A. increasing slip B. increasing current C. both A. and (b) D. none of the above...

4. Slip ring motor is recommended where____________?

   A. speed control is required B. frequent starting, stopping and reversing is required C. high starting torque is needed D. all above features are required...

5. A 3-phase slip ring motor has____________?

   A. double cage rotor B. wound rotor C. short-circuited rotor D. any of the above...

6. A 3-phase 440 V, 50 Hz induction motor has 4% slip. The frequency of rotor e.m.f. will be____________?

   A. 200 Hz B. 50 Hz C. 2 Hz D. 0.2 Hz...

7. The number of slip rings on a squirrel cage induction motor is usually____________?

   A. two B. three C. four D. none...

8. In Ns is the synchronous speed and s the slip, then actual running speed of an induction motor will be___________?

   A. Ns B. s.N, C. (l-s)Ns D. (Ns-l)s...

9. A 500 kW, 3-phase, 440 volts, 50 Hz, A.C. induction motor has a speed of 960 r.p.m. on full load. The machine has 6 poles. The slip of the machine will be__________?

   A. 0.01 B. 0.02 C. 0.03 D. 0.04...

10. In induction motor, percentage slip depends on__________?

    A. supply frequency B. supply voltage C. copper losses in motor D. none of the above...