Synchronous Machines Quiz Questions and Answers Pdf - 1

Question: 1

The speed of a synchronous motor can be varied by varying its

(A) Load

(B) Supply frequency

(C) Supply voltage

(D) Excitation

Question: 2

A 3-phase synchronous motor has

(A) Low starting current

(B) Low starting torque

(C) High starting torque

(D) No starting torque

Question: 3

The state core of a synchronous machine is built up of _____ laminations.

(A) Stainless steel

(B) Cast steel

(C) Cast iron

(D) Silicon steel

Question: 4

In case of turbo-alternators, rotor is made of

(A) Laminated silicon steel

(B) Manganese steel

(C) Stainless steel

(D) Forged steel

Question: 5

Armature winding is one in which

(A) Working or main flux is created by the armature current

(B) Working or main flux is created by the field current

(C) Emf is induced by the main or working flux

(D) Emf is induced by the leakage flux