Try the new Google Books
Check out the new look and enjoy easier access to your favorite features
Try the new Google Books
Check out the new look and enjoy easier access to your favorite features
-
Evaporative humidifiers → work on the principle of providing moisture on a surface and exposing it to dry air
True False
-
an electrostatic precipitator is the same as → an electronic air cleaner
True False
-
list 5 different sources of indoor air pollution → moisture,mold,pressed wood furniture,humidifier,moth repellents,dry-cleaned goods,house dust mites,carpets,drapes,fireplace, and house hold chemicals
True False
-
Environmental tabacco smoke (ETS) is more commonly known as _____. → Second hand smoke
True False
-
Air in homes tends to be drier in the winter. Why? → Cold outside air from infiltrates the conditioned space.
True False
-
Radon is a ___,___& ____ gas → discharge tiny water droplets into the air
True False
-
three general types of air cleaners are → Molds,mildew,bacteria ( also dust mites)
True False
-
why is it essential for the furnace to be operating when an atomizing humidifier is being used → Minerals in water
True False
-
One of the most common substances that is used as an absorber is _____. → spray-nozzle; centrifugal
True False
-
the recommended relative humidity in heated homes is between → 40% and 60%
True False
-
The controller for a humidifier, a humidistat, has a power element that is _____ sensitive. → spray-nozzle; centrifugal
True False
-
Atomizing Humidifiers → work on the principle of providing moisture on a surface and exposing it to dry air
True False
-
How does adding humidity to the air in a residence affect the thermostat setting? → By raising the relative humidity in the air, a person is more comfortable at a lower thermostat setting.
True False
-
the purifier ingredient in an activated charcoal air purifier may be → activated carbon,coconut shell pellets,manufactured from coal.
True False
-
ion generators_____particles in the area → mechanical filters;electronic air cleaners;ion generators
True False
-
What is the major objection to an atomizing type humidifier? → A type of humidifier that discharges tiny water droplets into the air that evaporate rapidly to raise the humidity of the air.
True False
-
the plenum-mounted humidifier is installed in the ____plenum → supply or return
True False
-
What are the relative humidity limits recommended for residences? → 40% and 60%
True False
-
Two substances mold needs to grow → discharge tiny water droplets into the air
True False
-
Humidification generally relates to the process of causing water to _____ into the air. → tiny water droplets
True False
-
The American Society of Heating, Refrigeration and Air Conditioning Engineers (ASHRAE) has guidelines governing indoor air quality. These guidelines are called ASHRAE Standard _____. → eliminate the sources of contamination. provide adequate ventilation. provide means for cleaning the air.
True False
-
When odor is a concern, a filter containing _____ should be used. → charcoal
True False
-
Describe an atomizing humidifier. → discharge tiny water droplets into the air
True False
-
Why are humidifiers usually installed in the supply duct of a gas-fired forced air heating system? → Hot air has lower humidity and it will natural accept the water vapor
True False
-
A house is built on property whose soil is rich in uranium. The occupants of the house may _____. → Cold outside air from infiltrates the conditioned space.
True False
-
Atomizing humidifiers discharge _____ into the air. → tiny water droplets
True False
-
Why are high efficiency particulate arrestor (HEPA) filters desirable? → Cold outside air from infiltrates the conditioned space.
True False
-
three methods to control indoor air contamination are → eliminate the sources of contamination. provide adequate ventilation. provide means for cleaning the air.
True False
-
Three different biological contaminants are → Molds,mildew,bacteria ( also dust mites)
True False
-
The two types of atomizing humidifiers are the _____ and _____. → spray-nozzle; centrifugal
True False
-
If reservoir-type humidifiers are not properly maintained, which of the following can be discharged into the air? → Mold (all sorts of stuff)
True False
-
Deep extended surface air filters are up to three times more efficient than regular air filters because the filter media used is _____. → Non woven cotton
True False
-
the relative humidity in heated homes is generally the ____ in the winter system → 40% and 60%
True False
-
Electronic air cleaners generally have _____. → an electronic air cleaner
True False
-
A high density fiberglass filter media air filter will catch and retain _____% of the particles in the air. → 70%
True False
-
describe the difference between absorption and adsorption →
AB-sorption is the proces of one substance being absorbed by another.
AD-sorption is the process of a thin film of liquid or gas adhering to the surface of a solid substance.
True False
-
Why should humidifiers be cleaned on a regular basis? → tiny water droplets
True False
-
The steps to aggressively controlling the contamination of indoor air would involve _____. → eliminate or minimize the source of contamination before trying something mechanically
True False