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Electrical Engineering - Industrial Drivers MCQs
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Electrical Engineering - Industrial Drivers MCQs
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25 Questions

1. The size of an excavator is usually expressed in terms of
2. For which of the following applications motor has to start with high acceleration?
3. In ______ method of staging three phase induction motors the starting voltage is not reduced.
4. For which of the following applications motor has to start with high acceleration?
5. need frequent starting and stopping of electric motors,
6. _______ motor is a constant speed motor.
7. Light duty cranes are used in which of the following ?
8. Reluctance motor is a
9. The characteristics of drive for crane hoisting and lowering are which of the following ?
10. In which of the following applications variable speed operation is preferred ?
11. is preferred for automatic drives.
12. For which of the following applications D.C. motors are still preferred ?
13. has least range of speed control.
14. In ________ the speed can be varied by changing the position of brushes.
15. Which of the following alternatives will be cheaper ?
16. Which of the following motors has series characteristics ?
17. The selection of an electric motor for any application depends on which of the following factors ?
18. While selecting an electric motor for a floor mill, which electrical characteristics will be of least significance ?
19. Which of the following machines has heavy fluctuation of load ?
20. Which of the following motors are best for the rolling mills ?
21. Ward-Leonard controlled D.C. drives are generally used for ______ excavators.
22. Which feature, while selecting a.motor for centrifugal pump, will be of least significance ?
23. Which of the following is essentially needed while selecting a motor ?
24. Which of the following motors is preferred when quick speed reversal is the main consideration ?
25. method of starting a three phase induction motor needs six terminals.