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Single Phase Induction Motors - Interview Questions and Answers

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61. The direction of rotation of universal motor can be reversed the by reversing the flow of current through
A. armature winding
B. field winding
C. either armature winding or field winding
D. none of the above
Explanation:
62. A reluctance motor
A. is self-starting
B. is constant speed motor
C. needs no D.C. excitation
D. all of the above
Explanation:
63. Which of the following motors is used for unity power factor ?
A. Hysteresis motor
B. Schrage motor
C. Universal motor
D. Reluctance motor
Explanation:
64. The speed/load characteristics of a universal motor is same as that of
A. A.C. motor
B. D.C. shunt motor
C. D.C. series motor
D. none of the above
Explanation:
65. In a ceilingfan employing capacitor run motor
A. secondary winding surrounds the primary winding
B. primary winding surrounds the secondary winding
C. both are usual arrangements
D. none of the above
Explanation:
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