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bu Flashcards

1
Q

Heating, Ventilation and Air Conditioning

A

HVAC

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2
Q

control the indoor environment

A

HVAC

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3
Q

Conditions at which most people are
likely to feel comfortable most of the
time

A

Human Comfort

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4
Q

eXERTED BY A VOLUME OF AIR IN A A GIVEN CONTAINER

A

AIR PRESSURE

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5
Q

PARTIAL PRESSURE OF THE WATER VAPOR

A

VAPOR PRESSURE

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6
Q

TEMPERATURE WITH NO MOISTURE IN THE AIR

A

Dry Bulb Temperature

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7
Q

MAXIMUM AMOUNT OF WATER VAPOR THAT AIR CAN HOLD.

A

dew point temperature

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8
Q

temperatire at which air reaches 100% relative humidity.

A

dew point

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9
Q

ACTUAK AMOUNT OF MOISTURE CONTAINED IN THE AIR

A

absolute humidity

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10
Q

RATIO OF THE AMOUNT OF MOISTURE IN THE AIR TO THE MAXIMUM AMOUNT OF MOISTURE THE AIR CAN HOLD.

A

RELATIVE HUMIDITY

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11
Q

Air is said to be saturated at ____ relative humidity

A

100%

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12
Q

change of refrigerant from liquid to gaseous state takes place in the _______

A

Evaporator

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13
Q

the change of refrigerant’s state from vapour to liquid takes place in the _________

A

Condenser

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14
Q

pumps the refrigerant through the air conditioning system at a designed flow rate and pressure

A

Compressor

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15
Q

helps in cooling the vapour
refrigerant

A

Fan

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16
Q

The Metering device
controls the flow of liquid refrigerant to the
evaporator.

A

Expansion valve

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17
Q

This Component is the heart of the system.

A

Compressor:

18
Q

Traps dirt & require preventive maintenance & cleaning

A

Condenser

19
Q

what gets rid of the heat in the system.

A

CondenserCoil

20
Q

Separates the high pressure side of the system from low pressure side.

A

Compressor

21
Q

Removes moisture from air(condensate).

A

Evaporator:

22
Q

Provide cooled air to the space.

A

Evaporator:

23
Q

Draw ambient and mix air across evaporator coil.

A

Evaporator fan:

24
Q

Draw ambient and mix air across evaporator coil.

A

Evaporator fan:

25
Q

Located at the evaporator coil.

A

Thermal expansion valve:

26
Q

Separates the high pressure side of the system from low pressure side

A

Thermal expansion valve:

27
Q

they’ve been shown to contribute to the greenhouse gas effect

A

Chlorofluorocarbons

28
Q

commonly known as Freon

A

R22

29
Q

R22 replacement for ACs

A

R410A

30
Q

ceiling suspended unit that cools the conditioned space via Duct network.

A

Ductable Split AC

31
Q

Floor Mounted unit that is installed in a separate room
commonly known as AHU Room.

A

Package AC unit

32
Q

large-scale ductless HVAC system that can perform at a high capacity.’

A

VARIABLE REFRIGERENT FLOW

33
Q

usually used for cooling the small buildings or the rooms on the single floor

A

‘DIRECT EXPANSION

34
Q

supplies chilled water for cooling needs of all the building air- handling units. (AHUs)

A

CHILLED WATER SYSTEMS

35
Q

facilitator of heat transfer between the inside of a building and outside of a
building

A

CHILLED WATER SYSTEMS

36
Q

are installed in an open window.

A

WINDOW AC

37
Q

unit that includes the compressor,
refrigerant and liquid line

A

WINDOW AC

38
Q

On the exterior the heat drawn from the interior is dissipated into the environment as a second fan blows outside air over the condenser.

A

WINDOW AC

39
Q

The condenser is separated from the
“indoor unit”, thus the term “split”

A

SPLIT AC

40
Q

They are ductless and they can be great for use in both residential and commercial buildings.

A

SPLIT AC

41
Q

equipment uses a stream of compressed air directed downwards to form shield to exclude drafts

A

AIR CURTAIN

HOA (11 decks)

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