Air Pressure and Flow Exam

1. Question

50 Pascal’s is equal to how many inches of water column?

0.2

Correct Incorrect Correct answer

0.02

Correct Incorrect Correct answer

2.0

Correct Incorrect Correct answer

20.0

Correct Incorrect Correct answer

2. Question

In what direction will air always move?

From higher pressure to lower pressure.

Correct Incorrect Correct answer

From lower pressure to higher pressure.

Correct Incorrect Correct answer

From indoors to outdoors.

Correct Incorrect Correct answer

From outdoors to indoors.

Correct Incorrect Correct answer

3. Question

What determines the airflow through an opening between two zones?

The hole size and the pressure difference between the zones.

Correct Incorrect Correct answer

The holes location and the velocity pressure.

Correct Incorrect Correct answer

The hole size and the friction rate.

Correct Incorrect Correct answer

The air turbulence and air velocity.

Correct Incorrect Correct answer

4. Question

When the return ducts in the attic of a home leak, what happens to the inside of the house?

The house is pressurized.

Correct Incorrect Correct answer

The house is depressurized.

Correct Incorrect Correct answer

The bedrooms are depressurized.

Correct Incorrect Correct answer

Nothing happens because the leaks are in the attic.

Correct Incorrect Correct answer

5. Question

What is measured in pascals?

Air pressure

Correct Incorrect Correct answer

Air temperature

Correct Incorrect Correct answer

Airflow

Correct Incorrect Correct answer

Air resistance

Correct Incorrect Correct answer

6. Question

What is the metric unit of pressure?

Pascal

Correct Incorrect Correct answer

Inches of water column

Correct Incorrect Correct answer

WRT

Correct Incorrect Correct answer

CFM 50

Correct Incorrect Correct answer

7. Question

What is the “stack effect)?

Air leakage caused by indoor-outdoor temperature differences.

Correct Incorrect Correct answer

Duct-induced pressure affects that movement of air through openings.

Correct Incorrect Correct answer

Air leakage caused by the wind.

Correct Incorrect Correct answer

Air leakage caused by air stagnation.

Correct Incorrect Correct answer

8. Question

Which of these choices describes how wind affects indoor building pressures?

Wind pressurizes some zones and depressurizes others.

Correct Incorrect Correct answer

Wind pressurizes the entire building

Correct Incorrect Correct answer

Wind depressurizes the entire building.

Correct Incorrect Correct answer

Wind has little or no effect on the building’s interior because wind occurs outdoors.

Correct Incorrect Correct answer

9. Question

Which of these choices must be present for air leakage to occur?

Pressure difference

Correct Incorrect Correct answer

Air barrier

Correct Incorrect Correct answer

Vapor barrier

Correct Incorrect Correct answer

Latent heat

Correct Incorrect Correct answer

10. Question

Which of the following doesn’t cause a pressure difference in homes

Humidifiers

Correct Incorrect Correct answer

Leaky ducts

Correct Incorrect Correct answer

Exhaust fans

Correct Incorrect Correct answer

Chimneys

Correct Incorrect Correct answer