For a D.C. shunt motor which of the following is incorrect ?

Related Mcqs:

1. ________________ motor is a constant speed motor?

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

2. 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...

3. The selection of an electric motor for any application depends on which of the following factors ?

   A. Electrical characteristics B. Mechanical characteristics C. Size and rating of motors D. Cost E. All of the above...

4. For blowers which of the following motor is preferred ?

   A. D.C. series motor B. D.C. shunt motor C. Squirrel cage induction motor D. Wound rotor induction motor...

5. 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...

6. A pony motor is used for the starting which of the following motors ?

   A. Squirel cage induction motor B. Schrage motor C. Synchronous motor D. None of the above...

7. In series motor which of the following methods can be used for changing the flux per pole ?

   A. Tapped field control B. Diverter field control C. Series-parallel control D. Any of the above...

8. 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...

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

   A. Oil expeller B. Floor mill C. Lifts and hoists D. Centrifugal pump...

10. While selecting motor for an air conditioner which of the following characteristics is of great importance ?

    A. Type of bearings B. Type of enclosure C. Noise D. Arrangement for power transmis¬sion E. None of the above...