HVACR UNIT 71

What instrument is used for measuring leakage rates in a building?

A blower door

What does amplification mean in indoor air quality terms?

A contaminant's ability to grow and spread

State the primary difference between a detector and a meter.

A detector simply detects the presence of a contaminant. A meter measures the amount of the contaminant.

What instrument is used primarily for measuring leakage in ductwork?

A duct blaster

The route that a pollutant takes to enter a building or area is called:

A pathway.

Pollutants that require lab testing for positive identification include:

Asbestos, radon, and mold.

The two major categories of pollutants that must be controlled when addressing indoor air quality are:

Chemical and biological.

The HVACR technician's role in indoor air quality is to:

Communicate with the building owner and the occupants on how the interacting systems of a building affect indoor air quality.

Carbon monoxide usually enters the living space:

From one area of the building to another.

How does increased ventilation sometimes help to improve indoor air quality?

It reduces the contaminant level through dilution.

What is the odorant commonly used in natural gas?

Mercaptan

The two most common pollutant pathways are:

Outside to inside and from one area inside to another area inside.

What is one way a technician can make IAQ happen safely and effectively?

Provide solutions to address a customer's concerns.

The most effective method for maintaining acceptable indoor air quality is:

Reduction and/or elimination of the pollutant sources.

What are the three most common ways to reduce pollutants in indoor air?

Source removal, ventilation, and filtration

What factors must be controlled to achieve acceptable indoor air quality?

Temperature, humidity, velocity, and pollutant level

To correctly identify pollutant pathways, technicians must understand:

The interaction of the building and its associated systems.

How is Indoor Air Quality (IAQ) defined?

The state of the air contained within an enclosed building

Infrared cameras are used to check:

Thermal leakage.

Why is environmental tobacco smoke difficult to remove from the air?

Tobacco smoke has an estimated 4,000 compounds in it.

To ensure critical steps are not missed in an IAQ test procedure, the technician should:

Use an IAQ checklist.

Digital manometers can be used to check:

Vents for proper operation.

VOCs are:

Volatile organic compounds.