Name: 
 

Chapter 13



True/False
Indicate whether the sentence or statement is true or false.
 

 1. 

Asbestos is no longer used in the USA.
 

 2. 

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

 3. 

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

Multiple Choice
Identify the letter of the choice that best completes the statement or answers the question.
 

 4. 

It is recommended that the air in a home be filtered at a rate of ____ changes per hour.
a.
1
c.
6
b.
3
d.
10
 

 5. 

A micron is the measurement equal to:
a.
one-hundredth of a meter
c.
one-millionth of a meter
b.
one-thousandth of a meter
d.
one-billionth of a meter
 

 6. 

Which of the following is the correct order in which air should enter an electronic air cleaner?
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
 

 7. 

The charcoal filter in an electronic air cleaning system removes which air pollutant?
a.
smoke
c.
odors
b.
dust mites
d.
mold
 

 8. 

The water flow through a flow-through type humidifier is directly controlled by a ____.
a.
solenoid valve
c.
water regulating valve
b.
humidistat
d.
float assembly
 

Short Answer
 

 9. 

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

 10. 

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



 
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