Fundamentals Of Electricity

Question 1

Which test instrument is used to read electrical pressure?

Answer 1

Volt meter

Question 2

The_______is used to read the current flowing through the conductor

Answer 2

Amp meter

Question 3

To read voltage the meter probes are placed_________the switch or the load

Answer 3

Across

Question 4

Which test instrument has its own power source

Answer 4

Ohm meter

Question 5

If the clamp-on ammeter is around one L1 conductor and one L2 conductor the reading will be?

Answer 5

Incorrect

Question 6

The rules for operating the________is, turn the power off, isolate the component, select the proper scale and zero the meter

Answer 6

Ohm meter

Question 7

What are the rules for using the clamp-on meter ammeter?

Answer 7

Only clamp one wire at a time

Question 8

The rules for using the voltmeter are?

Answer 8

Start at the highest rang if voltage is not known

Question 9

What is the power source used to energize the voltmeter?

Answer 9

Source voltage

Question 10

When using the voltmeter, if voltage is read across the switch being tested, is the switch opened or closed?

Answer 10

Opened

Question 11

A complete circuit is when_____is read across the load

Answer 11

Voltage

Question 12

If voltage is read across the load, but the load is not energized than the load is?

Answer 12

Bad

Question 13

What is the diagnosis if power is applied to the system but no voltage is read across the load?

Answer 13

Open circuit

Question 14

To find a bread in the circuit a troubleshooting procedure called_________is used

Answer 14

Hopscotch

Question 15

Which method of testing a fuse is more reliable, using the voltmeter or using the ohmmeter?

Answer 15

Ohmmeter

Question 16

When testing motor leads to determine common, start or run, which test instrument is used?

Answer 16

Ohmmeter

Question 17

Between which two terminals will you test the highest ohm reading?

Answer 17

Between run and start

Question 18

When testing a motor winding with the ohmmeter and zero ohms is read, what is the diagnosis?

Answer 18

It’s a short motor winding

Question 19

When testing a motor winding with the ohmmeter and infinite is read, what is the diagnosis?

Answer 19

It’s a open winding

Question 20

If a measurable reading is indicated across the motor winding, what condition does this indicate?

Answer 20

The windings are good

Question 21

A shorted run winding would read 0.0 between what pins on the compressor?

Answer 21

Common and run

Question 22

If the start to common ohm reading is 12 ohms and the run winding is, shorted what would you read between start and run?

Answer 22

12 ohms

Question 23

If a measurable reading is read between run and start, but infinite between common and run and common and start, what is the diagnosis?

Answer 23

Open I.P.

Question 24

A________ _________rated at 2 watts and 20,000 ohms is used to discharge capacitors

Answer 24

Bleed resistor

Question 25

The only truly reliable method of testing capacitors, is to use what testing instrument?

Answer 25

Capacitor analyzer

Question 26

On dual capacitors, witch motor windings are connected to the common terminal?

Answer 26

Run and start

Question 27

The rules for replacing run capacitors are, voltages____________and the microfarad rating is the same

Answer 27

Same or higher

Question 28

When testing a run cap the microfarad rating should be within + or - __________unless a smaller allowance is on the label

Answer 28

10%

Question 29

If two run capacitors are wired parallel, one is rated at 15 mfd and the other is rated at 10 mfd, what is the total capacitance for the motor?

Answer 29

25 mfd

Question 30

If the run capacitor is__________the start winding will draw higher than normal amperage

Answer 30

Decrease MFD rating

Question 31

When testing a PSR what ohm reading would be expected across pins 2 and 5?

Answer 31

3,000 to 14,000 ohms

Question 32

A start cap is using a 2 watt 20,000 ohm resistor across the terminals to protect the____________from welding closed when the PSR contacts are closed

Answer 32

PSR contacts