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Industrial Drives - Interview Questions and Answers

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26. 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
Explanation:
27. Heavy duty cranes are used in
A. ore handling plants
B. steel plants
C. heavy engineering workshops
D. all of the above
Explanation:
28. 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
Explanation:
29. Flame proof motors are used in
A. paper mills
B. steel mills
C. moist atmospheres
D. explosive atmospheres
Explanation:
30. In ________ the speed can be varied by changing the position of brushes.
A. slip ring motor
B. schrage motor
C. induction motor
D. repulsion motor
Explanation:
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