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CE Exam MARCH CYCLE > Appliances motors controllers & test equipment > Flashcards

Appliances motors controllers & test equipment Flashcards

1
Q

Are most standard household appliances rated less than 12 amps?

A

Yes

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

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2
Q

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

A

Branch circuit over current device

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3
Q

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 ?

A

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

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4
Q

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

A

An attachment plug and receptacle

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5
Q

What is an appliance branch circuit

A

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

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6
Q

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

A

At least 2

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7
Q

What is the normal circuit required for a washing machine ?

A

120volts
60cycle
15 to 20 amp circuit

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8
Q

What are the three basic types of appliances

A

Fixed
Portable
Stationary

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9
Q

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

A

0 ohms

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10
Q

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

A

Infinity

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11
Q

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

A

An inoperative oven control or the wrong element

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12
Q

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

A
  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
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13
Q

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

A

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

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14
Q

What is the probable cause of uneven baking ?

A

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

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15
Q

What are the two classes of appliance controls ?

A

Manual and automatic

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16
Q

What are the principal types of manual appliances controls?

A

Toggle switches and rotary switches

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17
Q

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

A

Yes

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18
Q

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

A

Rotary switches

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19
Q

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

A

A pull turn switch

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20
Q

What is the basic function of an appliance automatic control ?

A

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

21
Q

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 ?

A

The bimetallic blade control switch

22
Q

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

A

To adjustment of the temperature setting

23
Q

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 ?

A

A helix control switch

24
Q

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

A

A hydraulic control

25
Q

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

A

450 degrees F

26
Q

What do repairs to a hydraulic control consist of ?

A

Adjustment of the temperature setting

27
Q

What is the purpose of an appliance timer ?

A

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

28
Q

What is the first step in troubleshooting an appliance circuit ?

A

Study the schematics

29
Q

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

A

Visually inspect the circuit

30
Q

What does a visual check consist of ?

A

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

31
Q

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

A

The power supply and condition of the powers cord

32
Q

Should all circuits be regarded as live ?

A

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

33
Q

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

A

To keep other personnel from tampering and creating a hazardous condition

34
Q

What should an ohmmeter read if a switch is on ?

A

Zero

35
Q

What does a portable electrical tool tester consist of ?

A

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

36
Q

How many amps are passed through a tool tester ?

A

About 30 amps

37
Q

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

A

The open equipment ground light

38
Q

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?

A

The faulty equipment ground sensing relay

39
Q

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

A

Carbon, moisture paths , or or deterioration of insulation

40
Q

What is a current meter ?

A

Any meter used to measure the flow of electric current

41
Q

What is an ammeter ?

A

A current meter that measures current amperes

42
Q

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

A

Yes

43
Q

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

A

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

44
Q

Do all mannered have an adjustable scale ?

A

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

45
Q

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

A

The highest amperage range should be used

46
Q

What is the actual meter component of a voltmeter ?

A

A milliammeter or a micrometer

47
Q

What do portable voltmeters measure ?

A

One or more ranges of voltage

48
Q

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

A

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

CE Exam MARCH CYCLE (5 decks)

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