Understanding Three-Phase Motors

Understanding Three-Phase Motors

1st Grade

15 Qs

quiz-placeholder

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Understanding Three-Phase Motors

Understanding Three-Phase Motors

Assessment

Quiz

Engineering

1st Grade

Medium

Created by

RanjanKumar Naik

Used 1+ times

FREE Resource

15 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

1 min • 5 pts

What is a rotating magnetic field?

A static magnetic field that does not change over time.

A magnetic field created by permanent magnets only.

A magnetic field that only exists in a vacuum.

A rotating magnetic field is a magnetic field that changes direction and magnitude over time, typically produced by alternating currents in coils.

2.

MULTIPLE CHOICE QUESTION

1 min • 5 pts

How many phases does a three-phase motor have?

5

3

4

2

3.

MULTIPLE CHOICE QUESTION

1 min • 5 pts

What creates the rotating magnetic field in a motor?

The flow of direct current in the rotor.

The mechanical rotation of the rotor itself.

The presence of permanent magnets in the stator.

The interaction of alternating current in the stator windings.

4.

MULTIPLE CHOICE QUESTION

1 min • 5 pts

What is torque in a three-phase motor?

Torque is the amount of current flowing through the motor.

Torque is the voltage supplied to the motor.

Torque is the rotational force produced by the electromagnetic interaction in a three-phase motor.

Torque is the speed of the motor's rotation.

5.

MULTIPLE CHOICE QUESTION

1 min • 5 pts

How is torque measured in motors?

Torque is measured in Newton-meters (Nm) or pound-feet (lb-ft).

Torque is measured in joules (J)

Torque is measured in kilograms (kg)

Torque is measured in watts (W)

6.

MULTIPLE CHOICE QUESTION

1 min • 5 pts

What happens to torque when the load increases?

Torque decreases with an increase in load.

Torque remains constant regardless of load changes.

Torque is unaffected by the load applied.

Torque increases with an increase in load.

7.

MULTIPLE CHOICE QUESTION

1 min • 5 pts

What is slip in an induction motor?

Slip is the difference between synchronous speed and rotor speed, expressed as a percentage.

Slip is the speed at which the motor operates under full load.

Slip is the torque produced by the motor at synchronous speed.

Slip is the maximum speed of the rotor in an induction motor.

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