Free Printable Industrial Electric Motors

Worksheets

Industrial Electric Motors

Total questions: 26

Worksheet time: 13mins

Name

Class

Date

What are the two major components of an electric motor?

Stator and Rotor

Rotor and Inductor

Stator and Transformer

Stator and Capacitor

What are the opposite ends of coil windings U1, V1, and W1?

U2, V2, W2

U2, V1, W1

U3, V3, W3

U1, V1, W1

If a motor has a rated speed of 1774 rpm, how many poles does it have?

Which NEMA design motor would be best for a fan or pump application?

NEMA Design D motor

NEMA Design C motor

NEMA Design A motor

NEMA Design B motor

What is a megger used for on an induction motor?

To measure voltage levels in the motor.

To check the temperature of the motor windings.

To assess the mechanical alignment of the motor.

To measure insulation resistance of the windings in an induction motor.

If a motor has a service factor of 1.5, what does this mean?

The motor can only handle its rated capacity.

The motor is designed for continuous operation at 1.5 times its rated speed.

The motor has a lifespan of 1.5 years.

The motor can handle 1.5 times its rated capacity or 150%

Three-phase power is connected to the rotor on an induction motor. True or false?

True

False

The rotor speed is the same as the rotating magnetic field speed of the stator in an induction motor. Ture or False?

True

False

Spinning the shaft by hand is a good example of a motor check PM. True or False?

True

False

10.

what does an encoder do for a motor?

An encoder controls the motor's temperature.

An encoder increases the motor's power output.

An encoder provides feedback on the motor's position and speed.

An encoder is used to start and stop the motor.

11.

How does a resolver work in a motor?

A resolver generates power for the motor's operation.

A resolver only measures the temperature of the motor.

A resolver converts the rotational position of a motor shaft into an electrical signal for precise control.

A resolver increases the speed of a motor shaft.

12.

What is single phasing in a motor?

Single phasing occurs when a motor is overloaded and shuts down.

Single phasing is when a motor operates at a higher voltage than rated.

Single phasing refers to the condition when a motor is running in reverse.

Single phasing in a motor refers to the condition when one phase of a three-phase supply is lost, causing the motor to run on only two phases.

13.

what happens when a small gear pushes a large gear?

The small gear stops the large gear from moving.

The large gear drives the small gear, causing it to rotate faster and increases torque.

The small gear drives the large gear, causing it to rotate more slowly and increases torque.

Both gears rotate at the same speed without any effect.

14.

What did Nikola Tesla originally call his induction motor invention?

rotary transformer

permanent magnet motor

rotating field motor

asynchronous motor

15.

What tool is used to measure "air gap" on a motor brake?

Feeler gauge

Multimeter

Caliper tool

Torque wrench

16.

What are L1, L2, and L3 on a motor?

L1, L2, and L3 are the temperature sensors in a motor.

L1, L2, and L3 refer to the motor's speed settings.

L1, L2, and L3 are the three phases of power for a three-phase motor.

L1, L2, and L3 are the voltage ratings of a motor.

17.

Switching leads (L1, L2, L3) in the terminal block will increase torque output. True or False?

True

False

18.

What is the benefit of connecting motor windings in series (Delta)?

Lower current operation and reduced efficiency.

Increased heat generation and lower voltage operation.

Simplified wiring and decreased power consumption.

Higher voltage operation and higher torque at start up

19.

What is the benefit of connecting motor windings in star or wye?

Improved torque at high speeds.

Increased starting current and rough operation.

Higher efficiency at low speeds.

reduced starting current and ability to carry variable loads

20.

NEMA Design C and D motors are used on cranes, hoists, and stamping presses because of their high starting torques. True or False?

False

True

21.

What is the best possible reading during a megger insulation test?

100Ω

Above 5 MΩ

1 kΩ

0 Ω

22.

Like magnetic poles repel and unlike magnetic poles attract. True or False?

False

True

23.

What happens to motor shaft rotation if two of the three-phase power lines are swapped?

The motor shaft will rotate at a different speed but in the same direction.

The motor shaft will rotate in the opposite direction.

The motor shaft will rotate faster.

The motor shaft will stop rotating.

24.

What is an advantage of DC motors in comparison with AC motors?

Higher efficiency at high speeds.

Lower initial cost compared to AC motors.

Simpler design with fewer components.

More portable

25.

What does RPM (Revolutions Per Minute) on a motor nameplate mean?

RPM indicates the voltage of the motor.

RPM measures the torque produced by the motor.

RPM refers to the power consumption of the motor.

RPM on a motor represents the speed of the motor's rotor

26.

Describe FLA (Full Load Amps) on a motor nameplate

FLA is the voltage rating of the motor.

FLA indicates the minimum current required to start the motor.

FLA on a motor nameplate represents the maximum current the motor will draw at full load.

FLA refers to the temperature rating of the motor.

Reset

Industrial Electric Motors

Total questions: 26

Worksheet time: 13mins

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