Short-circuiter is used in_____________?
(A) repulsion induction motor
(B) repulsion motor
(C) repulsion start induction run motor
(D) none of the above
The range of efficiency for shaded pole motors is______________?
(A) 95% to 99%
(B) 80% to 90%
(C) 50% to 75%
(D) 5% to 35%
Burning out of winding is due to___________?
(A) short circuited capacitor
(B) capacitor value hiving changed
(C) open circuiting of capacitor
(D) none of the above
In A.C. series motor compensating winding is employed to_____________?
(A) reduce the effects of armature reaction
(B) increase the torque
(C) reduce sparking at the brushes
(D) none of the above
In split-phase motor auxiliary 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
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
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
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
A schrage motor can run on___________?
(A) zero slip
(B) negative slip
(C) positive slip
(D) all of the above
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