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

• locating and eliminating the source of contamination
• providing adequate ventilation
• providing methods for cleaning the air
• All of the above.

Tags

NGSS.MS-ETS1-2

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

• be exposed to radon gas
• be more susceptible to lung cancer
• smell the pungent odor of the radon
• Both a and b.

Electronic air cleaners generally have ____.

• ionizing sections
• charcoal filters
• prefilters
• All of the above.

A pleated filter ____.

• does not clog up as quickly as a standard filter
• has much more surface area that non-pleated filters
• costs less than a standard filter
• Both a and b.

Tags

NGSS.MS-ETS1-3

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

• Condense

• Evaporate

• Be ionized

• Be filtered

Tags

NGSS.MS-ESS2-1

NGSS.MS-ESS2-4

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

• Moisture

• Light

• Infrared

• Temperature

Atomizing humidifiers discharge ____ into the air.

• CO₂

• Electronic ions

• Carbon dioxide

• Tiny water droplets

What level of mold contamination corresponds to areas from 10 to 30 square feet?

• Level I.
• Level 2.

• Level 3.

• Level 4.

What are the relative humidity limits recommended for residences?

• 20% to 40%.

• 30% to 50%.

• 40% to 60%.

• 50% to 70.

A fiberglass media air filter contains a dust-holding adhesive that helps prevent particulates from ____.

• migrating downstream
• migrating upstream

• growing mold

• absorbing moisture