Indoor Air Quality
Indoor Air Quality
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Question 1 |
A building is said to have sick building syndrome when more than _____ percent of a building's
occupants complain during a two-week period of a set of symptoms that are alleviated when the
occupants leave the building.
A | 25 |
B | 80 |
C | 20 |
D | 50 |
Question 2 |
When symptoms of an illness can be traced to airborne building contaminants, it is referred to as
_____.
A | building-related illness |
B | new building syndrome |
C | Legionnaires disease |
D | sick building syndrome |
Question 3 |
A HEPA filter is likely to have a MERV rating of _____.
A | 5 to 8 |
B | 17 to 20 |
C | 13 to 16 |
D | 9 to 12 |
Question 4 |
Buildings that have low air exchange rates are _____.
A | tend to have the same air quality as buildings with high air exchange rates |
B | more susceptible to poor indoor air |
C | less susceptible to poor indoor air |
D | typically older buildings |
Question 5 |
High levels of carbon dioxide (CO2) in a building can result from _____.
A | the breathing of humans |
B | emissions from building materials and furnishings |
C | incomplete combustion of fuel burning equipment |
D | bioaerosols emitted from the human body digestive process |
Question 6 |
Which of the following is the greatest source of air pollution?
A | Electric power plants |
B | Gasoline vehicles |
C | Industrial facilities |
D | Diesel vehicles |
Question 7 |
You should suspect a cracked heat exchanger if there is a change in the flue gas oxygen
concentration of greater than _____ percent.
A | 1 |
B | 0.5 |
C | 0.1 |
D | 5 |
Question 8 |
Persons who are vulnerable to exposure to certain chemicals and/or combinations of chemicals may
suffer from _____.
A | chemical dependency |
B | multiple chemical sensitivity |
C | new building syndrome |
D | sick building syndrome |
Question 9 |
The most common source of radon is uranium in _____.
A | industrial emissions |
B | well water |
C | soil and rocks |
D | nuclear waste |
Question 10 |
Ultraviolet light is used to control _____.
A | radon gas |
B | moisture |
C | carbon monoxide |
D | bacteria |
Question 11 |
One of the best and most common methods of correcting indoor air problems is to _____.
A | dilute the indoor air with increased outdoor air ventilation |
B | balance the air distribution system |
C | close any system dampers to increase the use of recirculated air |
D | replace the air distribution system |
Question 12 |
Arrestance efficiency is a _____.
A | measure of how well a filter traps microbes |
B | test for HEPA filters |
C | measure of how much synthetic dust is removed by an air filter |
D | value assigned to a filter based on its performance on outside air |
Question 13 |
In terms of performance, pleated panel-type filters are classified as group _____ filters.
A | 4 |
B | 1 |
C | 3 |
D | 2 |
Question 14 |
Activated charcoal filters are used mainly to remove _____.
A | gaseous vapors |
B | atmospheric and household dust |
C | bacteria |
D | pollen |
Question 15 |
A ventilation problem may exist when the CO2 level in a room exceeds _____ ppm.
A | 800 |
B | 1,000 |
C | 500 |
D | 600 |
Question 16 |
Where should a filter be placed in an HVAC system?
A | In the return air system upstream from a heat exchanger or a cooling system |
B | In the return air system downstream from a heat exchanger or a cooling coil |
C | In the supply air system upstream from a heat exchanger or a cooling coil |
D | In the supply air system downstream from a heat exchanger or a cooling coil |
Question 17 |
Air filters must be installed
A | So that they are readily removable |
B | So that they are always next to a return air boot |
C | Within 6” maximum from the furnace return air opening |
D | Within 10” maximum from the furnace return air opening |
Question 18 |
What aids an air distribution system in evenly disbursing air across a filter medium?
A | An accordion type air filter |
B | A nonadjustable damper |
C | Turning vanes |
D | An adjustable damper |
Question 19 |
What is meant by the term ionizing?
A | A process of removing heat |
B | Charging a particle with a negative or positive charge |
C | Adding resistance to a circuit |
D | Coating a material with a solution |
Question 20 |
What are three common types of electronic air filters?
A | Removable plate type, ionizing plate type and charged media ionizing type |
B | Retractable static type, ionizing type, and nonionizing type |
C | Ionizing plate type, charged media nonionizing type, and charged media ionizing type |
D | Removable plate type, retractable static type, and ionizing plate type |
Question 21 |
What type of electronic filter generates positive ions on wires and uses a high voltage panel that holds the dust particles?
A | Ionizing plate type |
B | Retractable static type |
C | Charged media nonionizing type |
D | Removable plate type |
Question 22 |
What type of electronic filter uses a dielectric medium that is supported by an electrically charged grid?
A | Ionizing plate type |
B | Retractable static type |
C | Charged media ionizing type |
D | Charged media nonionizing type |
Question 23 |
What type of electronic filter generates ions and uses a dielectric medium that is supported by an electrically charged grid?
A | Ionizing plate type |
B | Retractable static type |
C | Charged media ionizing type |
D | Charged media nonionizing type |
Question 24 |
An electronic air filter removes particles as small as
A | 0.01 microns |
B | 0.001 microns |
C | 0.0001 microns |
D | 0.00001 microns |
Question 25 |
Where is an electronic air filter commonly installed on a furnace?
A | Ahead of the heat exchanger |
B | Downstream from the blower |
C | In the supply side of the furnace |
D | In the return side of the furnace |
Question 26 |
What is commonly used with electronic air filters to trap large dust particles?
A | A mesh screen after the electronic element |
B | A prefilter before the electronic element |
C | A prefilter after the electronic element |
D | An electrostatic medium before the element |
Question 27 |
On average, the filters of an electronic air cleaner must be cleaned
A | Once a week |
B | Once every 2 months |
C | Once every month |
D | Once every year |
Question 28 |
What is used to measure the pressure drop across a filter?
A | A water gauge manometer |
B | A mercury gauge manometer |
C | An anemometer |
D | A velometer |
Question 29 |
Disposable filters should be changed at least
A | Once a week |
B | Once every 2 months |
C | Once every month |
D | Once every year |
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