Deck 20: Indoor Air Quality

Question 1

If asbestos is found in a home, the homeowner can remove it as long as he/she wears a dust mask.

Answer 1

False

Question 2

As the relative humidity increases, the efficiency of an electrostatic filter increases.

Answer 2

False

Question 3

Fiberglass filters can be placed in the air stream in any position.

Answer 3

False

Question 4

Plenum-mounted humidifiers can be mounted only in the supply duct.

Question 5

Electrostatic and electronic air filters are two different types of air filters.

Question 6

A micron is the measurement equal to:

A) one-hundredth of a meter
B) one-thousandth of a meter
C) one-millionth of a meter
D) one-billionth of a meter

Question 7

UV lights can cause severe burns.

Question 8

It is perfectly safe to look at UV lights when they are illuminated.

Question 9

Asbestos is no longer used in the USA.

Question 10

Bypass humidifiers do not need a separate fan to move the air through them.

Question 11

It is recommended that the air in a home be filtered at a rate of __________ changes per hour.

A) 1
B) 3
C) 6
D) 10

Question 12

A HEPA filter must be able to capture 99.7% of all particulate matter that is at least __________ microns in size.

A) .1
B) .2
C) .3
D) .4

Question 13

If humidity levels in a home are over __________%, mold growth will be accelerated.

A) 40
B) 50
C) 60
D) 70

Question 14

Air flows through the components of an electronic air cleaner in which order?

A) pre-filter, ionization section, charcoal filter
B) charcoal filter, pre-filter, ionization section
C) ionization section, charcoal filter, pre-filter
D) pre-filter, charcoal filter, ionization section

Question 15

Radon gas found in homes comes from which source?

A) air
B) ground
C) water
D) gas heating system

Question 16

Air filters should be placed in the __________ of the forced air system.

A) return
B) supply
C) either a or b
D) neither a nor b

Question 17

Which type of air filters is washable?

A) foam
B) fiberglass
C) steel
D) HEPA

Question 18

The charcoal filter in an electronic air cleaning system removes which air pollutant?

A) smoke
B) dust mites
C) odors
D) mold

Question 19

As the temperature of the air sample increases, the amount of moisture that a given air sample can hold greatly increases.

Question 20

Which of the following is NOT a food source for mold?

A) wood
B) dirt
C) dust
D) metal

Question 21

Ultraviolet light has a wavelength that ranges from __________ nanometers.

A) 20 to 40
B) 100 to 200
C) 200 to 400
D) 400 to 600

Question 22

Arrange the following air filters in the order of effectiveness in filtering the air, with 1 being the best and 5 being the worst.
_____ extended surface filters
_____ steel filters
_____ fiberglass filters
_____ HEPA filters
_____ foam filters

Question 23

List the three methods of keeping indoor pollutants to a minimum.

Question 24

Ultraviolet air treatment systems are used on __________ systems and are most effective when used in conjunction with a __________ media.

Question 25

List six indoor air pollutants.

Question 26

The recommended humidity level for a residence should be __________% to __________% relative humidity.

A) 10, 20
B) 25, 35
C) 45, 55
D) 60, 70

Question 27

What does the acronym HEPA stand for in reference to air filters?

Question 28

The water flow through a flow-through type humidifier is directly controlled by a __________.

A) solenoid valve
B) humidistat
C) water regulating valve
D) float assembly

Question 29

List four major factors that contribute to mold growth in a home.

Question 30

Explain how the application of UV-C light works to improve indoor air quality.