Quiz No:59 Industrial Drives RRB , Coal India , PWD , Engineering diploma Level , PSC - Mahatmaacademy.com

Quiz No:59 Industrial Drives RRB , Coal India , PWD , Engineering diploma Level , PSC

1. Which of the following motors is preferred to fraction work?

 
 
 
 

2. Which of the following motors always starts on load?

 
 
 
 

3. ……… is preferred for automatic drives.

 
 
 
 

4. When the load is above …… a synchronous motor is found to be more economical.

 
 
 
 

5. The load cycle for a motor driving a power press will be—

 
 
 
 

6. Light duty cranes are used in which of the following ?

 
 
 
 

7. ………… is preferred for synthetic fibre mills.

 
 
 
 

8. Ward-Leonard controlled D.C. drives are generally used for ……… excavators.

 
 
 
 

9. Which of the following motors is used for elevators?

 
 
 
 

10. Which part of a motor needs maximum attention for maintenance?

 
 
 
 

11. ……… need frequent starting and stopping of electric motors,

 
 
 
 

12. ……… motor is a constant speed motor.

 
 
 
 

13. ……… is not a part of ball bearing.

 
 
 
 

14. Rotor of a motor is usually supported on …… bearings.

 
 
 
 

15. A reluctance motor—

 
 
 
 

16. The size of an excavator is usually expressed in terms of—

 
 
 
 

17. Which of the following is essentially needed while selecting a motor?

 
 
 
 

18. Reluctance motor is a—

 
 
 
 

19. In jaw crushers a motor has to often start against……… load.

 
 
 
 

20. Heat control switches are used in—

 
 
 
 

21. ……… has relatively wider range of speed control.

 
 
 
 

22. Flame proof motors are used in—

 
 
 
 

23. Which of the following machines has heavy fluctuation of load?

 
 
 
 

24. ……… has least range of speed control.

 
 
 
 

25. ……… has the least value of starting torque to full load torque ratio.