Air Filtration: Exam 2

Question 1

The term ____ refers to the small particles that become temporarily airborne from wind, as sudden earth disturbance, or mechanical work on a solid.

Answer 1

dust

Question 2

Which of the following is a gaseous pollutant?

1. radon
2. asbestos
3. fumes
4. bacteria

Answer 2

radon

Question 3

Airborne microorganisms such as viruses, fungi, mildew, and yeast are called;

1. fumes
2. bacteria
3. bioaerosols
4. none of the above

Answer 3

bioaerosols

Question 4

______ are simple, single cell microorganisms that are responsible for many diseases.

Answer 4

bacteria

Question 5

______ is a naturally occurring mineral that forms fibre bundles

1. carbon
2. yeast
3. pollen
4. none of the above

Answer 5

none of the above

Question 6

Filter efficiency is measured by the

1. degree of discolouration
2. total weight of dirt collected
3. size of the smallest particle that can be removed

Answer 6

all of the above

Question 7

____ is an advanced technique used to measure filter performance in which extremely accurate equipment is used to count the number of particles trapped by the filter

Answer 7

fractional efficiency

Question 8

In most electronic air cleaners, the largest particles and dirt are removed by a pre_____

Answer 8

prefilter

Question 9

Ultraviolet lamps should be replaced _____

Answer 9

yearly

Question 10

ultraviolet lamps should remove ____ of the bacteria in residential and commercial systems

1. 75-80%
2. 80-90%

Answer 10

80-90%

Question 11

T or F

The least economical way to maintain health and comfort conditions is by bringing in outside air to ventilate the space.

Answer 11

False

Question 12

T or F

A pollen count is a measurement of the amount of pollen each type of plant releases

Answer 12

false

Question 13

T or F

Carbon monoxide may be found inside homes or offices due to cracked heat exchangers

Answer 13

true

Question 14

T or F

ozone can be used to purify water, remove odours, or to maintain a sterile atmosphere

Answer 14

True

Question 15

T or F

Sensitivity to indoor pollutants varies from person to person

Answer 15

True

Question 16

T or F

A systematic investigation should be performed by a trained technician if the occupants of a building complain about building related symptoms

Answer 16

True

Question 17

T or F

To qualify as a HEPA filter under US gov standards, a filter must capture 95% of airborne particles 0.3 microns or larger

Answer 17

False

Question 18

T or F

Filters tend to unload excess contaminants once their capacity has been reached

Answer 18

True

Question 19

T or F

In a typical heat exchange installation, stale air is removed from bathrooms, laundry rooms, and kitchen

Answer 19

True

Question 20

T or F

As incoming fresh air and outgoing stale air passes through the HRV, heat is exchanged, so the incoming air is closer to the temperature of the outgoing air

Answer 20

True

Question 21

When an atom has an imbalance of electrons and protons , the atom is _____

Answer 21

ionized

Question 22

The ASHRAE standard by which air filters and electronic air cleaners are rated is ASHRAE standard ____

Answer 22

52.2

Question 23

A natural exchange of air through leakage into a building is known as ______

Answer 23

infiltration

Question 24

A heat exchanger that passes incoming fresh air and outgoing stale air through a series of parallel passages and also transfers humidity is called a energy _______ _______ (ERV)

Answer 24

energy recover ventilator (ERV)

Question 25

A natural passage of air leaving a building through doors, windows, and other construction joints is referred to as ex-_______

Answer 25

ex-filtration

Question 26

What is multiple chemical sensitivity (MCS)?

Answer 26

adverse reactions to low levels of chemicals

Question 27

By what three factors is filter efficiency measured?

Answer 27

1. total weight of dirt
2. colour
3. smallest particle that can be removed

Question 28

What is static electricity?

Answer 28

build up of charged particles

Question 29

What components does a complete air quality system combine?

Answer 29

AC, furnace, air purifier, UV, ERV, HRV

Question 30

List three primary causes of poor indoor air quality (IAQ) in homes?

Answer 30

1. decreased fresh air filtration
2. building materials used improperly
3. moisture/seapage