General

Question 1

Motors convert electrical energy into what?

Answer 1

Mechanical energy.

Question 2

What is a PSC motor?

Answer 2

Permanent split.

Question 3

How many windings are in a single phase motor?

Answer 3

Two, start and run.

Question 4

What are the 4 parts of a single phase motor?

Answer 4

Stator, frame, rotor/shaft and the end bells.

Question 5

Where are the run windings located?

Answer 5

At the bottom of the stator slots.

Question 6

When are the run windings connected?

Answer 6

They are connected continiously.

Question 7

Do the run windings have a large, or small conductor?

Answer 7

A large conductor.

Question 8

Where is the start winding found?

Answer 8

In the top of the stator slots.

Question 9

When are the start windings disconnected from the circuit?

Answer 9

When the motor reaches 75 percent of its rated speed.

Question 10

Does the run or start winding have more resistance?

Answer 10

The start winding has more resistance.

Question 11

Is a centrifugal switch normally opened or normally closed?

Answer 11

A centrifugal switch is normally closed.

Question 12

In which motor is the start winding de-energized after the motor reaches 75 percent of its rated speed?

Answer 12

RSIR or resistive start induction run motor.

Question 13

Which motor has about 300 percent more starting torque than running torque?

Answer 13

CSIR or capacitor start induction run motor.

Question 14

In a CSCR motor, is the run or start capacitor disconnected when the motor reaches 75 percent of it’s rated speed?

Answer 14

The start capacitor is removed from the circuit.

Question 15

What are the characteristics of a PSC motor?

Answer 15

Both windings and capacitor stay in the circuit continuously, and the run capacitor is oil filled.

Question 16

What is unique about a shaded pole motor?

Answer 16

It has a shading coil that creates a small amount of MMF in the core.

Question 17

Is a high voltage motor connected in series, or parallel?

Answer 17

A high voltage motor is connected in series.

Question 18

Is a low voltage motor connected in series or parallel?

Answer 18

A low voltage motor is connected in parallel.

Question 19

Which relay uses a low resistive coil and and a set of normally open contacts?

Answer 19

The current relay.

Question 20

Which motor uses a potential relay?

Answer 20

A potential relay is found with a CSCR motor.

Question 21

A 2 pole contactor has how many loads?

Answer 21

One single phase load.

Question 22

A 3 pole contactor has how many loads?

Answer 22

Three, single phase loads.

Question 23

What is a motor starter?

Answer 23

A contactor plus over-loads is a motor starter.

Question 24

What is the SI measurement for torque?

Answer 24

The newton.

Question 25

What is connected in series with the start winding?

Answer 25

The start capacitor.

Question 26

A motor with a service factor of less than 1.15 has the overloads set to what?

Answer 26

115% of it's rated FLA.

Question 27

A motor with a service factor of more than 1.15 has the overloads set to what?

Answer 27

125% of it's rated FLA.

Question 28

How do you wire multiple start buttons?

Answer 28

In parallel.

Question 29

How do you wire multiple stop buttons?

Answer 29

In series.

Question 30

What are three things required to create an AC voltage?

Answer 30

A magnetic field, a current carrying conductor, and relative motion.

Question 31

What does a transformer consist of?

Answer 31

Two windings, and one common core.

Question 32

What motor has the lowest starting torque?

Answer 32

The RSIR motor.

Question 33

What motor has the highest starting torque?

Answer 33

The CSIR motor.

Question 34

Which motor has the lowest starting current?

Answer 34

The CSCR motor.

Question 35

Which motor has the run cap left in at all times?

Answer 35

The PSC motor.

Question 36

Does a shaded pole motor have high, or low torque?

Answer 36

Very small amounts of torque.

Question 37

How is a potential relay wired?

Answer 37

In parallel with with the start winding. Disconnects the start cap while running. Known as the 5,2,1 relay.

Question 38

How is a current relay wired?

Answer 38

In series with the run winding. and has N/O contacts. Attaches directly to the compressor terminals.

Question 39

Does a potential relay have a low, or a highly resistive coil?

Answer 39

It has a low resistive coil.

Question 40

Which motor has the highest starting torque, the lowest current, and is the most expensive?

Answer 40

CSCR (Capacitor start, capacitor run)

Question 41

Which capacitors are electrolytic and designed to only be in the circuit for a few seconds?

Answer 41

Start capacitors.

Question 42

What motor is the most suitable as a belt driven motor, and why?

Answer 42

The CSIR motor, because of it's high starting torque.

Question 43

What section describes class 1 and 2 circuits?

Answer 43

Section 16.

Question 44

What are extra low voltage power circuits restricted to?

Answer 44

A maximum of 30V and a maximum power level of 1000 vA.

Question 45

What are class 1 remote control circuits limited to?

Answer 45

A maximum of 600V.

Question 46

What section of the CEC covers the Scope?

Answer 46

Section 16-000.

Question 47

What is the formula for line voltage?

Answer 47

Phase voltage x 1.732

Question 47

What is considered extra low voltage?

Answer 47

0-30 VAC

Question 48

What is considered low voltage?

Answer 48

600-1000 VAC

Question 49

What is considered high voltage?

Answer 49

Over 1000 VAC

Question 50

What does a signal circuit energize?

Answer 50

A bell, or a light.

Question 51

What does a remote control energize?

Answer 51

A relay coil or a contactor.