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Intallation > Installation > Flashcards

Installation Flashcards

1
Q

One btu in joule

A

1055

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2
Q

HEating value of propane

A

2500 btu/ cu ft

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3
Q

Heating value of natural gas

A

1000 btu/ cu ft

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4
Q

1 watt

A

3.413 btuh

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5
Q

Typical residential supply air velocity

A

800-1000

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6
Q

Solid fuel burning furnaces testing

A

Warnok hersey

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7
Q

Ashrae

A

American society of heating refrigerating and air-conditioning engineers

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8
Q

Smacna

A

Sheet-metal and air-conditioning contractors national association

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9
Q

Nfpa

A

National fire protection association

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10
Q

Oh gas and liquid fuel appliances that have a high temperature limit control of 250°F. Need to have a clearance to the top of.

A

2”

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11
Q

Plenum off solid fuel burning appliances should have a clearance off

A

18” to combustible and can be reduced reduced to 6 inches from a length of 39 inches and further reduced to 1 inch from a length of 6 feet

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12
Q

ABC requires cross, breaking over

A

12 inches

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13
Q

Duct should be reduced I need on that exceeds

A

24’

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14
Q

Ratio between width and depth of duct should never exceed

A

4:1

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15
Q

Length of offset is minimum

A

Two times the offset

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16
Q

Absolute zero

A

0 degree kelvin or -273 degree Celsius or -460 degree f

17
Q

One pund of water vapourises with

A

970 btu

18
Q

Humid air is

A

Less denser than dry air

19
Q

As the temperature increases the humidity

A

Decreases

20
Q

A residential make up air system should

A

One provide the needed amount of hair exchange
Distribute outdoor air where it is needed
Be quiet
Do not interfere with the other systems in the house
Demand controlled ventilation

21
Q

Typical hrv moves

A

200 cfm

22
Q

Hrv defrost

A

-7 degree c

23
Q

Sensible heat mesured by
Latent heat measured by

A

1 Thermometer or touch
2 Btu

24
Q

Fibrous media filters

A

10 microns

25
Q

Pleated media filters

A

3.0 to 10.0 microns

26
Q

Electrostatic filters

A

10 microns

27
Q

Electronic air cleaners

A

0.5 microns

28
Q

Hepa high efficiency particulate arrestance

A

0.3 microns
99.97 efficient

29
Q

No risk of hearing loss pitch sound levels below

A

70 DB

30
Q

Bends branches, junctions, and sudden changes in direction will cause noise level increase of approximately

A

15 to 20 DB

31
Q

When speed of air is doubled, noise levels will increase by

A

18 db

32
Q

Particulate range from

A

0.1 to 100 microns

33
Q

Ultrafine particles are

A

More than 99% of the particles suspended in the air are one micron or smaller

34
Q

Bioaerosols

A

Bacteria, molds fungi, dust, mites, and then check remains
Range from .1 to 10 µm.

35
Q

Volatile organic compounds are VOCs

A

Potentially harmful or irritating derivatives of alcohol, ketones hydrocarbons an aromatic, such as formaldehyde or benzene

Intallation (3 decks)

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