Important Electrical Machine Design Multiple Choice Questions and Answers
36. DC Machines provided with a large value of air gap length
A. Provides comparatively quite operation
B. Provides better ventilation.
C. Provides poor ventilation
D. Both A or B
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D. Both A or B
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37. The air gap provided in DC machines of smaller diameters and provided with lesser number of poles is comparatively
A. Smaller
B. Longer
C.Medium
D. Any of the above
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38. DC machines designed with a large value of air gap length
A. Provides better ventilation
B. Reduces the pulsation losses
C. Reduces the distortion effect
D. All of the above
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39. Use of large core length in a DC machine
A. Reduces the cost of the machine
B. Results in bad communication
C. Facilitates ventilation
D. Both A or B
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40. Number of parallel path for a four pole duplex lap winding will be
A. 2
B. 4
C. 6
D. 8
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