3.17 part 1

Residual magnetism in alternator is restored with

• Fishing the field

• Flashing the field

• Fashing the field

Mark the correct statement with regard to brush inspection

• Check the brushes periodically for length and general condition.

• Check the brushes annually for length and general condition.

• Check the brushes quaterlylly for length and general condition.

If the alternator fails to build up voltage as designated by applicable manufacturer's technical instructions

• test the ammeter first by checking the voltages of other alternators, or by checking the voltage in the suspected alternator with another voltmeter and comparing the results.

• test the alternator first by checking the voltages of other alternators, or by checking the voltage in the suspected alternator with another voltmeter and comparing the results.

• test the voltmeter first by checking the voltages of other alternators, or by checking the voltage in the suspected alternator with another voltmeter and comparing the results.

Alternator test stands are used for

• Testing alternators and motors in a repair facility

• Testing alternators and constant speed drives in a repair facility

• Testing alternators and constant speed motors in a repair facility

The frequency of alternator does not depends on

• Speed of rotation

• Number of poles

• No of coils

A two pole, 3 600 rpm alternator has a frequency of

• 25 cps

• 60 cps

• 48 cps

a six pole, 500 rpm alternator has a frequency of;

• 25 cps

• 60 cps

• 400 cps

the greater the number of pairs of poles....

• the higher the speed of rotation will be.

• the lower the speed of rotation will be.

• the same the speed of rotation will be.

The more poles on the rotor.............

• the lower the frequency will be for a given speed

• the higher the frequency will be for a given speed

• the same the frequency will be for a given speed

The maximum current that can be supplied by an alternator depends upon

• I2R power loss

• Eddy current loss

• Hysteresis loss