Temperature Flashcards

1
Q

What does the law of thermodynamics tell us?

A

Heat is gained or lost

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2
Q

What is the only point at which molecular movement exists known as?

A

Absolute zero

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3
Q

What is the purpose of the refrigeration cycle?

A

Absorb heat

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4
Q

What are the two most common types of temperature measurements?

A

Farienhiet and celcius

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5
Q

What is the method of heat exchange that occurs through a liquid or gas?

A

Convection

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6
Q

What does the refrigeration cycle have for pressure systems for the refrigeration cycle?

A

Two pressure sides. High and low side

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7
Q

What is happening to heat in the evaporator side of the refrigeration cycle?

A

It is being absorbed

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8
Q

What side of the cycle is the condenser in the refrigeration cycle?

A

High pressure

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9
Q

What happens to heat in the high pressure side of the system?

A

It is dissipated

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10
Q

What kind of strip will deflect or move a coil to express a temperature measurement?

A

Bimetallic

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11
Q

What can be made of platinum and is very accurate?

A

An RTD

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12
Q

What has an NTC which means it’s resistance will as the ambient temperature decreases?

A

A thermosister

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13
Q

What type of sensor is an RTD?

A

A thermo resistive

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14
Q

What does a thermo resistor require to generate a miliamp signal?

A

A power source

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15
Q

Does the thermosistor need a power source to change resistance?

A

No

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16
Q

In an RTD what happens when it’s resistance goes up?

A

Ambient temperature goes up

17
Q

What can use a thermosistor be used to monitor in a circuit?

A

Current

18
Q

What temperature sensor usually has a NTC?

A

Thermosistor

19
Q

What type of temperature sensor has a PTC?

A

An RTD

20
Q

What will two dissimilar metals twisted together and dipped in water produce?

A

A small amount of voltage

21
Q

What is the method of heat exchange that occurs through a liquid or gas?

A

Convection

22
Q

What is the method of heat exchange that can only occur in a vacuum?

A

Radiation

23
Q

What is the method of heat exchange that takes place through a solid?

A

Conduction

24
Q

What type of temp sensor is a thermo couple?

A

Thermo electric type sensor

25
Q

What is the purpose of the refrigeration cycle?

A

Absorb heat