ALTERNATOR - Practice Mode

1) Which rule is used to find the direction of induced emf in an alternator?

Cork screw rule Right hand palm rule Fleming's left hand rule Fleming's right hand rule

Correct Answer: Fleming's right hand rule

Explanation:

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2) How alternators are rated?

KVA KW MW KV

Correct Answer: KVA

3) What is the supply frequency of an alternator having 6 poles runs at 1000 rpm?

25 Hz 40 Hz 50 Hz 60 Hz

Correct Answer: 50 Hz

4) Calculate the speed of an alternator having 2 poles at a frequency of 50 Hz?

1500 rpm 2500 rpm 3000 rpm 6000 rpm

Correct Answer: 3000 rpm

5) What condition the lamps become dark in dark lamp method of parallel operation of two alternators?

Terminal voltages are e Voltage and frequency are equal Voltage and frequency are equal Frequency are same in both alternator

Correct Answer: Voltage and frequency are equal

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