The Ultimate Air Purifier Quiz

By: Staff

4 Min Quiz

Image: refer to hsw

About This Quiz

It's safe to say that sometimes you probably can't breathe well indoors, whether it be from smoke, strong cooking odors or dust. Do you just have to live with it, or is there something that can be done? Take this quiz to see how much you know about improving your indoor air quality.

How much do Americans spend per year on air purifiers?

Americans spend a whopping $250 million each year on home air purifying systems.


Why is air inside your home often dirtier than outside?

Inside air is often concentrated with mold, dust and pet dander, which can aggravate allergies. Pass the tissues!


Who is most affected by poor indoor air quality?

Those who have allergies or respiratory difficulties suffer most from indoor air contaminants.


What do air filters do?

Air filters are vital in removing dust and other nasty particles in air.


What shape of the material in an air filter is the most effective at cleaning the air?

Pleated filters work best because of their increased surface area for catching particles.


What is the purpose of a filter cartridge in a heating or cooling unit?

Every heating or cooling unit must have a filter cartridge. It not only filters the air, but minimizes damage to the unit from dust and dirt.


How effective are high-efficiency particulate air (HEPA) filters?

Try getting your head around these figures: 0.03 percent penetration (a really tiny amount) of 0.3 micrometer particles (a fantastically tiny amount)!


What industry uses the ultra-low penetration air (ULPA) filter?

ULPA filters are so effective at filtering the air that they are used for the nuclear power industry.


What happens when ionizing purifiers use a corona discharge?

Air passes through an intense magnetic field, and a positive or negative electron is attracted. The ionized particles then settle out of the air.


Where does an ozone generator get oxygen from?

An ozone generator extracts two oxygen atoms (dioxygen) from air molecules.


How stable is ozone?

Ozone is unstable; it readily reacts with chemicals, oxidizes metals and causes corrosion.


What is adsorbent material used for?

The word really is spelled "adsorbent" if you were wondering. Adsorb means to traps one substance onto another, similar to how activated charcoal collects toxic gas.


Why is activated charcoal the most commonly used adsorbent material?

Highly porous, activated charcoal has a large surface area that allows for many molecules to be trapped.


What do CADR numbers refer to?

Clean air delivery rate (CADR) numbers refer to how well an air cleaner removes various contaminants from a specific amount of air. Different pollutants such as tobacco smoke, pollen and dust have a different CADR number.


Why would a company use an industrial air purifier in addition to its heating and cooling system?

Some companies invest in these costly items to provide a necessary contamination-free environment, and many businesses use them because governments require them to comply with specific environmental regulations.


How many times a minute is the air in the "clean room" at the Intel computer company purified?

A "clean room" is where computer microchips and other sensitive electronic components are manufactured. It sounds incredible, but because Intel has a system that completely changes the inside air 10 times every minute, there is only one lone dust particle per cubic foot. Talk about spic and span!


What criticism about air purifiers has been shown to be true?

Studies done by the U.S. Environmental Protection Agency indicate that even when used according to manufacturer instructions, many ozone-generating air purifiers created ozone levels that exceed public health limits.


Why don't ozone air purifiers sold in the U.S. require Food and Drug Administration (FDA) approval?

Although they can be readily sold, as long as manufacturers don't make claims about their health benefits, FDA approval is not required for ozone air purifiers.


What does the U.S. Environmental Protection Agency (EPA) recommend regarding indoor air quality?

The EPA recommends using only verified methods of improving indoor air quality -- so don't waste your money on something that you don't know for sure will work.


Which of the following is NOT a good tip to control indoor air pollution?

Strong cleansers give off fumes that linger in the air and could make you sick. Combining bleach and ammonia can lead to a violent chemical reaction, too!


Explore More Quizzes

About HowStuffWorks Play

How much do you know about dinosaurs? What is an octane rating? And how do you use a proper noun? Lucky for you, HowStuffWorks Play is here to help. Our award-winning website offers reliable, easy-to-understand explanations about how the world works. From fun quizzes that bring joy to your day, to compelling photography and fascinating lists, HowStuffWorks Play offers something for everyone. Sometimes we explain how stuff works, other times, we ask you, but we’re always exploring in the name of fun! Because learning is fun, so stick with us!