test appliance Flashcards

1
Q

gasket

A

<p>Seals door</p>

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2
Q

gasket

A

<p>mechanical seal which fills the space between two or more mating surfaces usually to prevent leakage while under compression</p>

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3
Q

gasket

A

<p>Clean seals & gasket every 6 months w/ toothbrush, baking soda (or soap) + warm water</p>

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4
Q

compressor

A

<p>mechanical device that compresses a fluid (and increases it's temperature)</p>

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5
Q

compression

A

<p>application of an inward force to different points on a material/structure, balanced w/ no net sum or torque, so as to reduce its size in one or more directions</p>

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6
Q

refrigerator

A

<ol><li>Both<ul><li>vapor-compression cycle</li><li>auto-refrigeration from flash evaporation</li><li>sounds (event)</li></ul></li></ol>

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7
Q

vapor-compression cycle

A

<ol><li>Refrigerant enters compressor as a low pressure, low temperature gas</li><li>Compressor compresses and heats refrigerant, both<ul><li>into superheated gas</li><li>flowing into outside condenser coils</li></ul></li><li>Condenser coils and cooler kitchen condense and cools refrigerant</li><li>Condensed refrigerant flows into coils inside fridge/freezer</li><li>Expansion valve regulates the flow of refrigerant into evaporator to cause flash evaporation and auto-refrigeration</li><li>Vaporization:<ul><li>Fan blows hair from warmer enclosed refrigerator across evaporator coils</li><li>Evaporator coils uses warmer air to heat and vaporize refrigerant</li><li>Both<ul><li>Vaporized refrigerant enters compressor</li><li>Resulting cooler air exits</li></ul></li></ul></li><li>Repeat</li></ol>

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8
Q

auto-refrigeration

A

<p>lower than enclosed refrigerated space temperature resulting from flash evaporation</p>

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9
Q

clean

A

<p></p>

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10
Q

filter

A

<p>Every 6 months ... b/c for icemaker & water dispenser</p>

<ul><li>Replace water filter</li></ul>

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11
Q

freezer

A

<p>refrigerator that maintains a temperature below the freezing point of water</p>

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12
Q

refrigerator

A

<p>-</p>

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13
Q

enclosed space

A

<ol><li>All<ul><li>Check temperature ... b/c insufficiently cold will produce food safety issues, too cold puts stress on compressor and other components increasing their chance for failure<ul><li>Ensure refrigerator is in [37-40] deg Fahrenheit</li><li>Ensure freezer at 0 deg Fahrenheit</li></ul></li><li>Ensure fridge & freezer has plenty of items, using water jugs to fill extra space b/c increases efficiency</li><li>Ensure containers are secure b/c minimizes moisture</li></ul></li></ol>

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14
Q

flash evaporation

A

<p>immediate evaporation of part of a liquid accompanied by auto-refrigeration</p>

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15
Q

defrosting

A

<p>removal of frost and ice</p>

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16
Q

defrost

A

<p>... b/c improves refrigerator performance</p>

<ul><li>Consume/discard food that can either spoil easily or is difficult to refreeze</li><li>Turn off / unplug refrigerator</li><li>Open door</li><li>Remove all food and store w/ ice packs in cool place</li><li>Leave door open</li><li>Take out all removable shelves and drawers</li><li>Cover w/ towels<ul><li>front</li><li>side</li><li>bottom shelf</li></ul></li></ul>

<p>(Optional) Place 2 x boiling water in the ... b/c steam helps melt ice</p>

<ul><li>fridge</li><li>freezer</li></ul>

<p>(Optional) Dab rubbing alcohol onto the ice<br></br>(Optional) Use box fan or hair dryer b/c<br></br>(Optional) Wet/dry alternating between blowing to melt and vacuum to remove water<br></br>Clean refrigerator</p>

17
Q

thawing

A

<p>-</p>

18
Q

compressor

A

<p>-</p>

19
Q

refrigerant

A

<p>fluid that undergoes repeated liquid to gas phase transition</p>

20
Q

condenser coils

A

<p>-</p>

21
Q

condenser coil

A

<p>Every 3 months ... b/c increases efficiency<br></br>Unplug refrigerator<br></br>Vacuum coils w/ brush attachment</p>

22
Q

condenser

A

<p>heat exchanger that cools and condense a gaseous substance w/ heat released into surround environment</p>

23
Q

condensation

A

<p>phase transition of matter from a vapor to a liquid</p>

24
Q

expansion valve

A

<p>restricts the flow of cooling refrigerant from the condenser to the evaporator causing abrupt pressure and temperature drop</p>

25
Q

fan

A

<p>-</p>

26
Q

vaporization

A

<p>phase transition of matter from a liquid to vapor </p>

27
Q

heat exchanger

A

<p>transfers heat between 2+ fluids</p>

28
Q

heat pump

A

<p>a device that transfers thermal energy from one space to a another space using the refrigeration cycle</p>

29
Q

excess moisture

A

<ol><li>Remove excess moisture</li><li>Establish/ensure airtight containers on all items</li></ol>

30
Q

frost

A

<ol><li>defrost (user)</li></ol>

31
Q

power outage

A

<p>Avoid opening, relying on food for pantry b/c will maintain temperature for 24-48 hours</p>

32
Q

boiling/gurgling/knocking

A

<p>refrigerant circulation</p>

33
Q

fan

A

<p>-</p>

34
Q

sounds

A

<p>refrigerant circulation</p>

35
Q

fan

A

<p>-</p>