Deck 20: Air Humidification and Filtration

Question 1

The main purpose of adding a humidifier to a heating system is to replace the moisture that is removed by the heating equipment.

Answer 1

True

Question 2

One of the most common substances that is used as an absorber is ____.

A) charcoal
B) silica gel
C) fiberglass
D) foam rubber

Answer 2

A

Question 3

The steps to aggressively controlling the contamination of indoor air would involve ____.

A) locating and eliminating the source of contamination
B) providing adequate ventilation
C) providing methods for cleaning the air
D) all of the above

Answer 3

D

Question 4

What are the relative humidity limits recommended for residences?

A) 20% to 40%
B) 30% to 50%
C) 40% to 60%
D) 50% to 70%

Question 5

The controller for a humidifier, a humidistat, has a power element that is ____ sensitive.

A) moisture
B) light
C) infrared
D) temperature

Question 6

If reservoir-type humidifiers are not properly maintained, which of the following can be discharged into the air?

A) fungi
B) bacteria
C) algae
D) all of the above

Question 7

Electronic air cleaners generally have ____.

A) ionizing sections
B) charcoal filters
C) pre-filters
D) all of the above

Question 8

What is the recommended maximum number of grains per pound of material in the water supplied to an atomizing humidifier?

A) 10
B) 50
C) 100
D) 125

Question 9

A humidifier should cycle with the blower in the heating unit.

Question 10

Steel filters are economical since they are ____________________.

Question 11

An extended surface filter (pleated type) ____.

A) does not clog up as quickly as a standard filter
B) is able to remove more dirt since the surface area is larger
C) costs less than a standard filter
D) both a and b

Question 12

The two types of atomizing humidifiers are the _________________________ and _________________________.

Question 13

When odor is a concern, a filter containing ____________________ should be used.

Question 14

Environmental tobacco smoke (ETS) is more commonly known as ______________________________.

Question 15

Humidification generally relates to the process of causing water to ____ into the air.

A) condense
B) evaporate
C) be ionized
D) be filtered

Question 16

A house is built on property whose soil is rich in uranium. The occupants of the house may ____.

A) be exposed to radon gas
B) be more susceptible to lung cancer
C) smell the pungent odor of the radon
D) both a and b

Question 17

The American Society of Heating, Refrigeration and Air Conditioning Engineers (ASHRAE) has guidelines governing indoor air quality. These guidelines are called ASHRAE Standard ____________________.

Question 18

A high density fiberglass filter media air filter will catch and retain ____% of the particles in the air.

A) 70
B) 80
C) 90
D) 95

Question 19

Atomizing humidifiers discharge ____ into the air.

A) CO₂
B) electronic ions
C) tri-valant oxygen
D) tiny water droplets

Question 20

People who are active and spend a great deal of time outdoors are more likely to experience the effects of pollution.

Question 21

Why are humidifiers usually installed in the supply duct of a gas-fired forced air heating system?

Question 22

To remove odors, downstream from air filters, a filter using a material called ______________________________ is used.

Question 23

In the ionizing section of an electronic air cleaner, the particles in the air are ___________________________________.

Question 24

What is the major objection to an atomizing type humidifier?

Question 25

How can the installation of a humidifier help to reduce heating costs?

Question 26

Why are high efficiency particulate arrestor (HEPA) filters desirable?

Question 27

Air in homes tends to be drier in the winter. Why?

Question 28

Define relative humidity.

Question 29

Deep extended surface air filters are up to three times more efficient than regular air filters because the filter media used is ______________________________.

Question 30

Why should humidifiers be cleaned on a regular basis?

Question 31

Describe an atomizing humidifier.

Question 32

How does adding humidity to the air in a residence affect the thermostat setting?

Question 33

For high-efficiency fossil fuel and electronic furnaces as well as heat pump systems, the recommended humidifier would be an ______________________________ type.