1000+ DC Generators Objective Questions and Answers Pdf - 2

Question: 6

In D.C. generator, lap winding is used for

(A) low voltage, low current

(B) high voltage, low current

(C) low voltage, high current

(D) high voltage, high current

Question: 7

Iron losses in a D.C. machine are independent of variations in

(A) speed and voltage

(B) voltage

(C) speed

(D) load

Question: 8

Armature reaction of an unsaturated D.C. machine is

(A) magnetising

(B) demagnetising

(C) crossmagnetising

(D) none of the above

Question: 9

Following D.C. generator will be in a position to build up without any residual magnetism in the poles

(A) self excited generator

(B) compound generator

(C) shunt generator

(D) series generator

Question: 10

The field coils of D.C. generator are usually made of

(A) carbon

(B) cast iron

(C) copper

(D) mica