# Synchronous Generator MCQ – Alternator Questions with Answers

A Synchronous Generator is an AC Generator that converts mechanical energy to AC Electrical Energy. The synchronous generator is found at power stations where it is synchronized with the turbine.

Given below are basic MCQ (with answers) on Synchronous Generator.

## Synchronous generator is also known as

Synchronous generator is also known as:

1. Degenerator
2. Alternator
3. Decoupler
4. Magnetostat

## Rotor winding of alternator is also known as

Rotor winding of alternator is also known as:

1. Field winding
2. Armature winding
3. Protruding winding
4. Nonsalient winding

## A 4 pole, 50 Hz alternator will turn at

A 4 pole, 50 Hz alternator will turn at:

1. 1500 RPM
2. 3000 RPM
3. 6000 RPM
4. 12000 RPM

## The type of alternator used in hydropower stations

The type of alternator used in hydropower stations:

1. Turbo
2. Salient pole
3. Non-salient
4. Any of the above

## An under-excited alternator supplies

An under-excited alternator supplies:

2. Lagging VAR
3. Zero VAR
4. Any of above

## Drop in alternator frequency is resolved by

Drop in alternator frequency is resolved by:

1. Using voltage regulator
2. Employing amortisseur windings
3. Raising speed of prime mover
4. None of these

Correct answer: 3. Raising speed of prime mover

Formula: N = 120*f/P

Where N = Speed

f = frequency

P = Pole number

## While using the three light bulb method if the bulbs brighten in succession it indicates

While using the three light bulb method if the bulbs brighten in succession it indicates:

1. Same phase sequence
2. Opposite phase sequence
3. Huge phase difference
4. None of these

Correct answer: 2. Opposite phase sequence

While using the three light bulb method if the bulbs brighten in succession it indicates the opposite phase sequence and one of sequences needs to be reversed

## With the increase in speed of alternator increases, the frequency

With the increase in speed of alternator increases, the frequency:

1. Increases
2. Decreases
3. Remains same