MICROBIAL RECOMBINATION AND GENE TRANSFER QUIZ

The alternators driven by _______ do not have a tendency to hunt.

Water turbines

Diesel engines

Steam turbines

None of the listed here

TRUE ANSWER : ?
YOUR ANSWER : ?

A lower voltage alternator, for the same power rating, will be

Larger in size

More efficient

Operating at high rpm

More costly

TRUE ANSWER : ?
YOUR ANSWER : ?

The power factor of an alternator is determined by its

Speed

Load

Primemover

Excitation

TRUE ANSWER : ?
YOUR ANSWER : ?

In an alternator the armature reaction is mainly influenced by

Short circuit ratio

Total current drawn

Speed of the alternator

The power factor of the load

TRUE ANSWER : ?
YOUR ANSWER : ?

The frequency of the system with which several alternators are paralleled can be increased of by simultaneously _______ of all generators.

Increasing the field excitation

Decreasing the speed of prime movers

Decreasing the field excitation

Increasing the speed of prime movers

TRUE ANSWER : ?
YOUR ANSWER : ?

The losses in an alternator are the same as in

None of the listed here

A transformer

A dc machine

A rectifier

TRUE ANSWER : ?
YOUR ANSWER : ?

The rating of an alternator is expressed in______

kVA

HP

kW

kVAR

TRUE ANSWER : ?
YOUR ANSWER : ?

In a large generator, dampers

Increase stability

Reduce voltage fluctuations

None of the listed here

Reduce frequency fluctuations

TRUE ANSWER : ?
YOUR ANSWER : ?

In huge alternators, the moving part is

Poles

None of the listed here

Brushes

Armature

TRUE ANSWER : ?
YOUR ANSWER : ?

The frequency of emf generated in an 8-pole alternator running at 900 rpm is ______

50 Hz

None of the listed here

120 Hz

60 Hz

TRUE ANSWER : ?
YOUR ANSWER : ?

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