Appliances motors controllers & test equipment

Question 1

Are most standard household appliances rated less than 12 amps?

Answer 1

Yes

So they can be used in standard outlets on a 110 volt, 15 amp circuit

Question 2

What device usually serves as the disconnecting method for fixed or stationary appliances that are not rated at 300 voltsamperes or 1/8 horsepower ?

Answer 2

Branch circuit over current device

Question 3

What device usually serves as the the disconnecting method for fixed or stationary appliances that are rated at greater than 300 voltsamperes or 1/8 horsepower ?

Answer 3

A circuit breaker if it is in sight of the appliance or is capable of being locked in an open position

Question 4

What device usually serves as the disconnecting method for portable appliances ?

Answer 4

An attachment plug and receptacle

Question 5

What is an appliance branch circuit

Answer 5

Ant circuit which supplies electrical energy to one or more outlets to which appliances are connected

Question 6

What is the minimum number of appliance receptacle branch circuits that must be installed in a kitchen for receptacle outlets ?

Answer 6

At least 2

Question 7

What is the normal circuit required for a washing machine ?

Answer 7

120volts
60cycle
15 to 20 amp circuit

Question 8

What are the three basic types of appliances

Answer 8

Fixed
Portable
Stationary

Question 9

What is the correct reading for a good wire when using an ohmmeter for testing wire ?

Answer 9

0 ohms

Question 10

What is the correct reading for a faulty wire when using an ohmmeter for testing wire ?

Answer 10

Infinity

Question 11

What is the probable cause of an oven that is too hot ?

Answer 11

An inoperative oven control or the wrong element

Question 12

What are probable causes of no heat at a single surface burner ?

Answer 12

1. Burned out element
2. An open in the burner circuit
3. Corroded contacts in a control switch
4. Loose terminal connections at the burner unit

Question 13

What is the remedy for appliances that fail to heat when plugged into the appliance outlets on an eke true range ?

Answer 13

Cleaning and tightening of the connections ; replacement of fuses, wires, or outlets if required

Question 14

What is the probable cause of uneven baking ?

Answer 14

A tilted range or oven racks which are not positioned on the proper support

Question 15

What are the two classes of appliance controls ?

Answer 15

Manual and automatic

Question 16

What are the principal types of manual appliances controls?

Answer 16

Toggle switches and rotary switches

Question 17

Is it generally true that new toggle switches are so inexpensive that it is more economical to replace old ones rather than repair them ?

Answer 17

Yes

Question 18

What type of switches are normally used to control the top elements of electrical ranges ?

Answer 18

Rotary switches

Question 19

What type of switch is used in commercial ranges and in galley installations ?

Answer 19

A pull turn switch

Question 20

What is the basic function of an appliance automatic control ?

Answer 20

To turn a current on and off as required in order to maintain a desired temperature

Question 21

What type of automatic control consists of a control switch that Is operated by the expanding and contracting effect caused by two pieces of dissimilar metals welded together ?

Answer 21

The bimetallic blade control switch

Question 22

What is the repair of a bimetallic blade control switch limited to?

Answer 22

To adjustment of the temperature setting

Question 23

What type of control is operated by thermostatic metal that coils and uncoils when heat is applied, thus regulating a switch in order to make and break an electric circuit ?

Answer 23

A helix control switch

Question 24

Which type of control is the most commonly used control for automatic regulations of temperature of cooking appliances ?

Answer 24

A hydraulic control

Question 25

What is the normal setting for the safety device of an appliance hydraulic control that trips upon reaching the set temperature ?

Answer 25

450 degrees F

Question 26

What do repairs to a hydraulic control consist of ?

Answer 26

Adjustment of the temperature setting

Question 27

What is the purpose of an appliance timer ?

Answer 27

To automatically control an appliance circuit or to provide a warning that predetermined amount of time has elapsed

Question 28

What is the first step in troubleshooting an appliance circuit ?

Answer 28

Study the schematics

Question 29

What is the second step in trouble shooting an appliance circuit ?

Answer 29

Visually inspect the circuit

Question 30

What does a visual check consist of ?

Answer 30

Checking for any loose wiring , loose connections , burnt wires , and or burnt components

Question 31

What is the first part of an appliance circuit such must be checked when attempting to locate an electrical fault in an appliance ?

Answer 31

The power supply and condition of the powers cord

Question 32

Should all circuits be regarded as live ?

Answer 32

Yes until all switches have been opened or the required voltage tests have been performed that indicate a dead circuit

Question 33

Why must all switches be locked and tagged in the open position when working on a circuit ?

Answer 33

To keep other personnel from tampering and creating a hazardous condition

Question 34

What should an ohmmeter read if a switch is on ?

Answer 34

Zero

Question 35

What does a portable electrical tool tester consist of ?

Answer 35

A transformer , sensing relays , indicator lights , an audible warning buzzer and suitable leads for tool or appliance connections

Question 36

How many amps are passed through a tool tester ?

Answer 36

About 30 amps

Question 37

Which light glows glows on a tool tester if there is no equipment ground ?

Answer 37

The open equipment ground light

Question 38

What relay is activated in a tool tester if the resistance of the ground on the equipment being tested is approximately 0.2 to 1.5 ohms?

Answer 38

The faulty equipment ground sensing relay

Question 39

What causes the presence of a dangerous power ground to occur when using a tool tester ?

Answer 39

Carbon, moisture paths , or or deterioration of insulation

Question 40

What is a current meter ?

Answer 40

Any meter used to measure the flow of electric current

Question 41

What is an ammeter ?

Answer 41

A current meter that measures current amperes

Question 42

Is an ammeter connected in series with the circuit source and load ?

Answer 42

Yes

Question 43

Where can portable ammeters be temporarily connected into a wiring system ?

Answer 43

At any point in the system where a current reading is needed

Question 44

Do all mannered have an adjustable scale ?

Answer 44

Yes the function and range of the ammeter are altered as the scale is changed

Question 45

What scale should be selected on a clamp on ammeter when taking a measurement of an unknown amount of current ?

Answer 45

The highest amperage range should be used

Question 46

What is the actual meter component of a voltmeter ?

Answer 46

A milliammeter or a micrometer

Question 47

What do portable voltmeters measure ?

Answer 47

One or more ranges of voltage

Question 48

What is the purpose of a range selector switch on a voltmeter ?

Answer 48

To internally connect the appropriate multimeter resistor into the meter circuit for the correct range of voltage to be measured