___________________has least range of speed control?

Related Mcqs:

1. __________________ has relatively wider range of speed control?

   A. Synchronous motor B. Ship ring induction motor C. Squirrel cage induction motor D. D.C. shunt motor...

2. Which of the following motors is preferred when smooth and precise speed control over a wide range is desired ?

   A. D.C. motor B. Squirrel cage induction motor C. Wound rotor induction motor D. Synchronous motor...

3. For three-phase induction motors which of the following is the least efficient method of speed control ?

   A. Cascade control B. Pole changing C. Rheostat control D. Combination of cascade and pole changing...

4. An aeroplane of wingspan 10m flies from the equator towards the North Pole. The wings are perpendicular to the vertical component of the earths magnetic field (B = 4×10-5T). At maximum speed an emf of 96mV is induced across the wing tips. The maximum speed of the aeroplane is____________?

   A. 150msec-1 B. 384msec-1 C. 38.4msec-1 D. 200msec-1...

5. While selecting an electric motor for a floor mill, which electrical characteristics will be of least significance ?

   A. Running characteristics B. Starting characteristics C. Efficiency D. Braking...

6. Which feature, while selecting a.motor for centrifugal pump, will be of least significance ?

   A. Starting characteristics B. Operating speed C. Horse power D. Speed control...

7. _______________has the least value of starting torque to full load torque ratio?

   A. D.C. shunt motor B. D.C. series motor C. Squirrel cage induction motor D. Slip ring induction motor...

8. In case of _______________ speed control by injecting e.m.f. in the rotor circuit is possible?

   A. d.c. shunt motor B. schrage motor C. synchronous motor D. slip ring induction motor...

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

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

10. The travelling speed of cranes varies from_________________?

    A. 20 to 30 m/s B. 10 to 15 m/s C. 5 to 10 m/s D. 1 to 2.5 m/s...