ALTERNATORS QUIZ

The efficiency of the turbo-alternator _____ with increases in speed.

None of the listed here

Remians unchanged

Increases

Decreases

TRUE ANSWER : ?
YOUR ANSWER : ?

The synchronous reactance of an alternator is due to ______

None of the listed here

Leakage flux

Dc field excitation

Armature reaction

TRUE ANSWER : ?
YOUR ANSWER : ?

An alternator coupled to which primemover will usually have the highest rotating speed?

Reciprocating diesel engine

Steam turbine

Steam engine

Francis turbine

TRUE ANSWER : ?
YOUR ANSWER : ?

Voltage regulation of an alternator is larger than that of a dc generator because of _______

Large leakage reactance

Complex effects of armature reaction

None of the listed here

Large armature resistance

TRUE ANSWER : ?
YOUR ANSWER : ?

If the lagging load pf of an alternator is decreased, the demagnetising effect of armature reaction _______

None of the listed here

Is increased

Is decreased

Remains the same

TRUE ANSWER : ?
YOUR ANSWER : ?

Turbo alternators have rotors of _______

Same diameter and axial length

Large diameter and long axial length

Small diameter and long axial length

Large diameter and small axial length

TRUE ANSWER : ?
YOUR ANSWER : ?

The losses in an alternator are the same as in

A dc machine

None of the listed here

A transformer

A rectifier

TRUE ANSWER : ?
YOUR ANSWER : ?

A two pole alternator is running at 1500 rpm. Its angular velocity is ______

157 rad/s

212 rad/s

118 rad/s

192 rad/s

TRUE ANSWER : ?
YOUR ANSWER : ?

Turbo alternator are generally used to run at

5000 rpm

1500 rpm

3000 rpm

15000 rpm

TRUE ANSWER : ?
YOUR ANSWER : ?

What is the largest size of a alternator being manufactured in india?

500 MW

250MW

110 MW

210 MW

TRUE ANSWER : ?
YOUR ANSWER : ?

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