Installation

Question 1

One btu in joule

Answer 1

1055

Question 2

HEating value of propane

Answer 2

2500 btu/ cu ft

Question 3

Heating value of natural gas

Answer 3

1000 btu/ cu ft

Question 4

1 watt

Answer 4

3.413 btuh

Question 5

Typical residential supply air velocity

Answer 5

800-1000

Question 6

Solid fuel burning furnaces testing

Answer 6

Warnok hersey

Question 7

Ashrae

Answer 7

American society of heating refrigerating and air-conditioning engineers

Question 8

Smacna

Answer 8

Sheet-metal and air-conditioning contractors national association

Question 9

Nfpa

Answer 9

National fire protection association

Question 10

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.

Answer 10

2”

Question 11

Plenum off solid fuel burning appliances should have a clearance off

Answer 11

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

Question 12

ABC requires cross, breaking over

Answer 12

12 inches

Question 13

Duct should be reduced I need on that exceeds

Answer 13

24’

Question 14

Ratio between width and depth of duct should never exceed

Answer 14

4:1

Question 15

Length of offset is minimum

Answer 15

Two times the offset

Question 16

Absolute zero

Answer 16

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

Question 17

One pund of water vapourises with

Answer 17

970 btu

Question 18

Humid air is

Answer 18

Less denser than dry air

Question 19

As the temperature increases the humidity

Answer 19

Decreases

Question 20

A residential make up air system should

Answer 20

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

Question 21

Typical hrv moves

Answer 21

200 cfm

Question 22

Hrv defrost

Answer 22

-7 degree c

Question 23

Sensible heat mesured by
Latent heat measured by

Answer 23

1 Thermometer or touch
2 Btu

Question 24

Fibrous media filters

Answer 24

10 microns

Question 25

Pleated media filters

Answer 25

3.0 to 10.0 microns

Question 26

Electrostatic filters

Answer 26

10 microns

Question 27

Electronic air cleaners

Answer 27

0.5 microns

Question 28

Hepa high efficiency particulate arrestance

Answer 28

0.3 microns 99.97 efficient

Question 29

No risk of hearing loss pitch sound levels below

Answer 29

70 DB

Question 30

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

Answer 30

15 to 20 DB

Question 31

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

Answer 31

18 db

Question 32

Particulate range from

Answer 32

0.1 to 100 microns

Question 33

Ultrafine particles are

Answer 33

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

Question 34

Bioaerosols

Answer 34

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

Question 35

Volatile organic compounds are VOCs

Answer 35

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