MATERIALS AND COMPONENTS QUIZ

Which of the following components of a D.C, generator plays vital role for providing direct current of a D.C. generator?

Commutator

Dummy coils

Equalizer rings

Eye bolt

TRUE ANSWER : ?
YOUR ANSWER : ?

In lap winding, the number of brushes is always

Same as the number of poles

Two

Double the number of poles

Half the number of poles

TRUE ANSWER : ?
YOUR ANSWER : ?

Dc machines which are subjected to abrupt changes of load are provided with

Copper brushes

Interpole windings

Compensating windings

Equalisers

TRUE ANSWER : ?
YOUR ANSWER : ?

The number of parallel paths in a simplex lap winding is equal to

None of the listed here

2

Number of poles

Number of pairs of poles

TRUE ANSWER : ?
YOUR ANSWER : ?

A separately excited generator as compared to a self-excited generator

Is amenable to better voltage control

Is more stable

Has exciting current independent of load current

Has all above features

TRUE ANSWER : ?
YOUR ANSWER : ?

The armature conductors of a 6 pole, lap wound dc generator are divided into

4 parallel paths

6 parallel paths

2 parallel paths

3 parallel paths

TRUE ANSWER : ?
YOUR ANSWER : ?

A sinusoidal voltage of 5 Hz is applied to the field of a shunt generator. The armature voltage wave

will be of 5 Hz

will be zero

will be of 5 xiVHz

will be of v Hz 5

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YOUR ANSWER : ?

In case of dc machines, mechanical losses are primary function of

Voltage

Current

None of the listed here

Speed

TRUE ANSWER : ?
YOUR ANSWER : ?

The field structure of a dc machine uses ______

None salient pole arrangements

Both salient and non salient pole arrangements

None of the listed here

Salient pole arrangements

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following generator provides approximately constant voltage from no load to full load?

Over compounded

Series

Flat compounded

Shunt

TRUE ANSWER : ?
YOUR ANSWER : ?

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