1000+ Single Phase Induction Motor Questions and Answers Pdf - 1

Question: 1

In a split phase motor

(A) centrifugal switch is used to control supply voltage

(B) the running winding is connected through a centrifugal switch

(C) the starting winding is connected through a centrifugal switch

(D) both starting and running windings are connected through a centrifugal switch

Question: 2

The range of efficiency for shaded pole motors is

(A) 5% to 35%

(B) 50% to 75%

(C) 80% to 90%

(D) 95% to 99%

Question: 3

A hysteresis motor works on the principle of

(A) electromagnetic induction

(B) eddy current loss

(C) magnetization of rotor

(D) hysteresis loss

Question: 4

In split phase motor auxiliary winding is of

(A) thin wire placed at the bottom of the slots

(B) thin wire placed at the top of the slots

(C) thick wire place at the top of the slots

(D) thick wire placed at the bottom of the slots

Question: 5

The direction of rotation of universal motor can be reversed the by reversing the flow of current through

(A) either armature winding or field winding

(B) armature winding

(C) field winding

(D) none of the above