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

Correct answer: 2. Two

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

Correct answer: 1. True

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. η_slip = η_sync + η_m
2. η_slip = η_sync * η_m
3. η_slip = η_sync – η_m
4. η_slip = η_sync / η_m

Correct answer: 3. η_slip = η_sync – η_m