For which of the following applications motor has to start with high acceleration ?

Related Mcqs:

1. In which of the following applications the load on motor changes in cyclic order ?

   A. Electric shovels B. Cranes C. Rolling mills D. All of the above...

2. In jaw crushers a motor has to often start against ____________________ load?

   A. heavy B. medium C. normal D. low...

3. For which of the following applications D.C. motors are still preferred ?

   A. High efficiency operation B. Reversibility C. Variable speed drive D. High starting torque...

4. In which of the following applications variable speed operation is preferred ?

   A. Exhaust fan B. Ceiling fan C. Refrigerator D. Water pump...

5. ________________ motor is a constant speed motor?

   A. Synchronous motor B. Schrage motor C. Induction motor D. Universal motor...

6. A wound rotor induction motor is preferred, as compared to squirrel cage induction motor, when major consideration is____________________?

   A. slop speed operation B. high starting torque C. low windage losses D. all of the above...

7. RC coupling is generally confined to low power applications because of____________?

   A. Large value of coupling capacitor B. Low efficiency C. Large number of components D. None of the above...

8. The rate of acceleration on suburban orurban services is restricted by the consideration of______________?

   A. Engine power B. Track curves C. Passenger Discomfort D. Track size...

9. The rate of acceleration on suburban orurban service is in the range_________________?

   A. 0.2 to 0.5 km phps B. 1.6 to 4.0 km phps C. 5 to 10 km phps D. 15 to 25 km phps...

10. The diameter of the rotor shaft for an electric motor depends on which of the following ?

    A. r.p.m. only B. Horse power only C. Horse power and r.p.m. D. Horse power, r.p.m. and power factor...