ALTERNATORS QUIZ

Low speed alternators are driven by ______

Hydraulic turbines

Steam turbines

Steam engine

None of the listed here

TRUE ANSWER : ?
YOUR ANSWER : ?

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

Decreases

None of the listed here

Increases

Remians unchanged

TRUE ANSWER : ?
YOUR ANSWER : ?

The synchronous reactance of an alternator is due to ______

Dc field excitation

Leakage flux

None of the listed here

Armature reaction

TRUE ANSWER : ?
YOUR ANSWER : ?

High speed alternators are driven by _____.

None of the listed here

Steam turbines

Hydraulic turbines

Diesel engines

TRUE ANSWER : ?
YOUR ANSWER : ?

The speed of a salient pole machine is nearly

500 rpm

1000 rpm

3000 rpm

1500 rpm

TRUE ANSWER : ?
YOUR ANSWER : ?

In an alternator, the stator frame serves

To protect the whole machine

To hold the armature stampings

To verticate the armature

As a return path for the flux

TRUE ANSWER : ?
YOUR ANSWER : ?

The non salient field construction is used for _______ alternator.

Medium speed

Low speed

High speed

None of the listed here

TRUE ANSWER : ?
YOUR ANSWER : ?

The speed at which a 6-pole alternator should be driven to generate 50 cycles per second is _______

1000 rpm

None of the listed here

1500 rpm

500 rpm

TRUE ANSWER : ?
YOUR ANSWER : ?

The rotor of a turbo alternator is made cylindrical in order to reduce_______

Hysteresis loss

None of the listed here

Windage loss

Eddy current loss

TRUE ANSWER : ?
YOUR ANSWER : ?

A turbo alternator uses ________

None of the listed here

Nonsalient pole field structure

Rotating ac machine winding

Salient pole field structure

TRUE ANSWER : ?
YOUR ANSWER : ?

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