102D Flashcards

1
Q

Wet thermometer reads

A

Wet bulb

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2
Q

Wet bulb temperature reads what heat

A

Sensible heat

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3
Q

Dew point is where

A

Dry and wet bulb are the same

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4
Q

Relative humidity is

A

The percentage of actual water vapour pressure in air compared to water vapour pressure

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5
Q

Relative humidity in buildings should be between

A

20-60%

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6
Q

How many grains are in one pound of water

A

7000 grains

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7
Q

Specific volume is the

A

Space taken up by air and is described as the number of liters weighing 1kg

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8
Q

Specific density

A

Is the pounds per cubic foot of air (lb/ft3)

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9
Q

VOC are

A

Volatile organic compounds emit toxic emissions

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10
Q

Basic airflow concept is

A

Atmospheric airflow
Indoor airflow
Conservation of energy

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11
Q

Air transfer is in three ways

A

Radiation
Conduction
Convection

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12
Q

Gauge pressure use

A

Fluid pressure

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13
Q

Metric gauge pressure have units called

A

Pascals

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14
Q

Three types of pressure are

A

Static pressure
Total pressure
Velocity pressure

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15
Q

Linear airflow rate is

A

Air velocity

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16
Q

AC has a cfm/ton

A

400cfm/ton

17
Q

HP had a CFM/ton

A

450cfm/ton

18
Q

Air cleanliness units are measured in

A

Microns

19
Q

MERV stands for

A

Minimum efficiency reporting value

20
Q

Basic commercial merv ratings are

A

5-9

21
Q

Hospital surgery areas merv rating is

A

15-17

22
Q

A pitot tube is a

A

Air measuring device

23
Q

Velometer

A

Measured air velocity

24
Q

Barometer measures

A

Airflow

25
Q

Pitot tube is the most

A

Accurate method