# Induction Motor MCQ Part 1

Induction Motor MCQ – Multiple Choice Questions on Induction Motor Part 1

## Which of following is correct statement about Induction Motor

Which of following is correct statement about Induction Motor:

1. A strong DC field circuit is required
2. A medium DC field circuit is required
3. A low DC field circuit is required
4. No DC field current is required

Correct answer: 4. No DC field current is required

## The induction motor has distinguishing feature that there is that no DC field current required to run the machine

The induction motor has a distinguishing feature that there is that no DC field current required to run the machine

## On the basis of rotor construction induction motors are of how many types

On the basis of rotor construction induction motors are of how many types:

1. One
2. Two
3. Three
4. Four

On the basis of rotor construction induction motors are of two types: The wound rotor and squirrel cage.

## Generally wound rotor motors are more expensive than squirrel cage motor

Generally wound rotor motors are more expensive than squirrel cage motor:

1. True
2. False

Generally, a wound rotor induction motor is more expensive than a squirrel cage motor

## The speed of magnetic field rotation depends on which of the following factor

The speed of magnetic field rotation depends on which of the following factor:

1. Frequency
2. Pole number
3. Both of these
4. None of these

Correct answer: 3. Both of these

The speed of magnetic filed rotation is mathematically given as:

η = (120 * f)/P

Where f = Frequency and P = Pole number

## Slip speed is mathematically expressed as

Slip speed is mathematically expressed as:

1. ηslip = ηsync + ηm
2. ηslip = ηsync * ηm
3. ηslip = ηsync – ηm
4. ηslip = ηsync / ηm

Correct answer: 3. ηslip = ηsync – ηm