Latest Single Phase Induction Motors Multiple choice Questions and Answers pdf

31.    For which of the applications a reluctance motor is preferred ?
(a)     Electric shavers
(b)     Refrigerators
(c)    Signalling and timing devices
(d)    Lifts and hoists
Ans: c

32.    The motor used on small lathes is usually
(a)     universal motor
(b)     D.C. shunt motor
(c)    single-phase capacitor run motor
(d)    3-phase synchronous motor
Ans: c

33.    Which of the following motors is preferred for tape-recorders ?
(a)    Shaded pole motor
(b)    Hysteresis motor
(c)    Two value capacitor motor
(d)    Universal motor
Ans: b

34.    A single-phase induction motor is
(a)     inherently self-starting with high torque
(b)     inherently self-starting with low torque
(c)    inherently non-self-starting with low torque
(d)    inherently non-self-starting with high torque
Ans: c

35.    A schrage motor can run on
(a) zero slip 
(b) negative slip
(c) positive slip    
(d) all of the above
Ans: d

36.    A universal motor can run on
(a)     A.C. only
(6)     D.C. only
(c)    either A.C. or D.C.
(d)    none of the above
Ans: c

37.    Which of the following single-phase motors is suitable for timing and control purposes ?
(a)     Reluctance motor
(b)     Series motor
(c)    Repulsion motor
(d)    Universal motor
Ans: a

38.    Single phase induction motor usually operates on
(a)     0.6 power factor lagging
(b)     0.8 power factor lagging
(c)    0.8 power factor leading
(d)    unity power factor
Ans: a

39.    In split-phase motor iauxiliary winding is of
(a)    thick wire placed at the bottom of the slots
(b)    thick wire placed at the top of the slots
(c)    thin wire placed at the top of the slots
(d)    thin wire placed at the bottom of the slots
Ans: c

40.    Which of the following motors will operate at high power factor ?
(a)    Shaped pole motor
(b)    Split phase motor
(c)    Capacitor start motor
(d)    Capacitor run motor
Ans: d

Read More Questions: 
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