Which of the following motors is preferred when quick speed reversal is the main consideration ?

Related Mcqs:

1. 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...

2. Which of the following motors is preferred for traction work ?

   A. Universal motor B. D.C. series motor C. Synchronous motor D. Three-phase induction motor...

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. Which of the following motors is usually preferred for kiln drives ?

   A. Cascade controlled A.C. motor B. Slip ring induction motor C. Three phase shunt wound com-mutator motor D. Any of the above...

5. For a motor-generator set which of the following motors will be preferred ?

   A. Synchronous motor B. Slip ring induction motor C. Pole changing induction motor D. Squirrel cage induction motor...

6. Which of the following motors is preferred for boom hoist of a travelling crane ?

   A. Single phase motor B. Synchronous motor C. A.C. slip ring motor D. Ward-Leonard controlled D.C. shunt motor...

7. 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...

8. 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...

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

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

10. Which of the following is the major consideration to evolve a good design?

    A. Cost B. Durability C. Compliance with performance criteria as laid down in specifications D. All of the above Submitted by: Abid...