temperature humidity and ventilation Flashcards

1
Q

Heat is also known as ?

A

Energy

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2
Q

Moving more molecular energy will result in ?

A

Higher temperatures

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3
Q

Cold is the term used for the absense of ?

A

Heat

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4
Q

Multiply 1.8 and then add 32 to get from c to f true or false?

A

true

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5
Q

Thermodynamics is a branch that deals with ?

A

Mechanical action of heat

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6
Q

Thermodynamics that has heat always travels from ?

A

A warm object to a cold object

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7
Q

Whats happens to the cold water and a hot objects is put into the same water ?

A

Heat transfers till until they are the temp

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8
Q

What is conduction heat ?

A

Heat that transfers through a substance

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9
Q

Radiation is

A

Heat energy similar to light waves

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10
Q

What is sensible heat ?

A

Is the heat to a product but will not change the substance

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11
Q

Latent heat is ?

A

The amount of heat to change the substance with out the change of temperature

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12
Q

1 btu is use to raise ?

A

1 pound of water or 55 cubic feet of air

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13
Q

Humidity is ?

A

Volume of water in the air

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14
Q

Warmer air can hold more moisture true or false ?

A

True

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15
Q

Whats the minimum ventilation capacity ?

A

0.3

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16
Q

Principle exhaust fan should be able to push more then 50% percent of ?

A

Total ventilation capacity

17
Q

Whats the ideal system of make up air ?

A

Demand controlled ventalation system

18
Q

Air pollutants are also controlled by ?

A

Central system

19
Q

Heating coil in make up air system will activate at ?

A

-15 c

20
Q

To cut cost on heating and removing air pollutants is to ?

A

Use a hrv because it recovers the heat

21
Q

Some hrv are capable of recovering how much heat ?

A

85%

22
Q

Typical residential hrv can move up to ?

A

200 cfm

23
Q

Hrv is designed for constant use at low speeds and higher speeds during high moisture environments

A

true

24
Q

Define air volume?

A

Volume increases as air gets warm

25
Q

Define density ?

A

It decreases as air gets warmer

26
Q

What direction dose heat travel?

A

It travels to the cold spots and regulates from the spots that need heated

27
Q

How is sensible heat measure ?

A

By a temperature sensor or feel

28
Q

Hows is latent heat measured ?

A

Its measured in btu