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Indoor Air Quality Final Exam Questions and Answers
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Indoor Air Quality Final Exam Questions and Answers Which type of duct undergoes more rigorous testing before it is labeled? Flexible duct Rectangular sheet metal ducts are joined together using: S-locks and drives cleats. Previous Play Next Rewind 10 seconds Move forward 10 ...

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  • August 9, 2024
  • 2
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

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  • indoor air quality final exam questions and answer
  • which type of duct undergoes more rigorous testing
  • rectangular sheet metal ducts are joined together
  • what is the normal maximum air velocity across t

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Indoor Air Quality Final Exam Questions
and Answers
Which type of duct undergoes more rigorous testing before it is labeled? - answer
Flexible duct

Rectangular sheet metal ducts are joined together using: - answer S-locks and
drives cleats.

What is the normal maximum air velocity across the face of a low-efficiency panel filter?
- answer 300 feet per minute

Organizations that set safety standards for manufactured ductwork include: - answer
Underwriters Laboratories and the National Fire Protection Association.

The formula for measuring airflow using temperature rise is: - answer CFM =
Btuh/(1.08 x Temperature Rise).

Hangers for fiberboard duct should be placed no further than every: - answer 6 ft.

Using the percentage of design flow method, a system that leaks 100 CFM in a system
with a design flow of 1,200 CFM has a leakage rate of: - answer 100 CFM/1,200
CFM = 8% leakage rate.

Two types of takeoff fittings available for sheet metal duct include: - answer Dove
tail, adhesive-backed flanges.

What friction rate should be used to size a duct for a design friction rate of 0.12 in WC if
the duct has a total equivalent length of 150 ft? - answer 0.12 x (100/150) = 0.67 x
0.12 = 0.08 in WC

Air leaking out of a building is called: - answer Exfiltration.

What adjusted friction rate should be used to size a duct for a design friction rate of 0.1
in WC if the duct has a total equivalent length of 75 feet? - answer 0.10 x (100/75) =
0.10 x 1.33 = 0.133 in WC

Using the CFM per 100 sq ft method, a 1,600 sq for house leaking 120 CFM has a
leakage rate of: - answer 120/16 = 7.5 CFM per 100 sq ft.

Hangers for metal duct should be placed no further than every: - answer 12 ft.

Air being blown into a building with a blower is called: - answer Ventilation.

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