Deck 2: Types of Electric Motors

Question 1

An alternating current of 60Hz changes direction 100 times per second.

Answer 1

False

Question 2

__________________________________________________ motor produces a high starting torque, which is needed for many applications in the industry.

Answer 2

Capacitor-Start-Induction-Run Motor

Question 3

The capacitor consists of two aluminum plates with an insulator between them.

Answer 3

True

Question 4

Motor speed is generally used to classify motors into different types.

Question 5

The magnetic lines are referred to as _________________________.

Question 6

The permanent magnet is a piece of magnetic material that has been magnetized and can hold its magnetic strength for a reasonable length of time.

Question 7

Magnetism can only be produced by the earth core.

Question 8

All magnets have two poles, a ____________________ and a ____________________ pole.

Question 9

Two types magnets are in use today: the _________________________ and the _________________________.

Question 10

All magnets have two poles.

Question 11

To make an electric motor rotation continuous the magnet field must rotate.

Question 12

If the south pole of a magnet is brought close to the north pole of another bar magnet, they will ____________________ each other.

Question 13

Motors are selected mainly because of the starting torque required for the motor to perform its function.

Question 14

The ________________________________________ motor produces a high starting torque and increases the running efficiency.

Question 15

The magnetic lines of force of a magnet that flow between the ____________________ and ____________________ poles.

Question 16

If the north pole of a bar magnet is brought close to the north pole of another bar magnet, they ____________________ each other.

Question 17

Motors are commonly either open or enclosed.

Question 18

Resistance-Start-Induction-Run motor has only a starting winding and running.

Question 19

The electromagnet is a magnet produced through ____________________.

Question 20

An alternating current motor's speed is determined by the frequency of the power supply.

Question 22

What are the two general classifications of split-phase motors used in the HVAC industry?

Question 23

What are shaded pole motors used for?

Question 24

What is induced Magnetism?

Question 25

What are the advantages of using a ECM over a PSC?

Question 26

What is magnetism?

Question 27

____________________ is a brushless DC, three-phase motor with a permanent magnet rotor.

Question 29

How do electric motors work?

Question 30

What are five types of motors used in environmental systems today?

Question 31

The ECM stator is a ___________________________________ stator wound like a three phase.

Question 34

What are the two types of capacitors used in the HVAC industry?

Question 35

Identify each variable in the speed formula listed below. S = (F ´ 120)/NP

Question 36

ECM is a ____________________ part motor.