Residential Energy Audit - Chapter 3
Residential Energy: Cost Savings and Comfort for Existing Buildings [Book] by John Krigger, John Krigger & Chris Dorsi - House & Home - Saturn Resource Management, Inc. (2004) - Paperback - 318 pages
- 1.The _________ combined with the ___________ defines the thermal boundary.
- A.
Air barrier
- B.
Insulation
- C.
Walls
- D.
Attic
- E.
Crawl space
- 2.The main goals of air leakage control are to:
- A.
Save energy
- B.
Increase comfort
- C.
Reduce vermin in the house
- D.
Enhance fire safety
- E.
Avoid moisture migration into building cavities.
- 3.Indicate the correct measurement for air leakage through construction materials.
- A.
CFM
- B.
CFM25 per 100 square ft
- C.
CFM50 per100 square ft
- 4.Which of the following materials are not considered to be air barriers?
- A.
Standard concrete block
- B.
Spray on cellulose
- 5.Direct air leakage occurs at:
- A.
Windows
- B.
Doors
- C.
The building shell
- 6.Indirect air leakage occurs at:
- A.
Windows
- B.
Doors
- C.
The building shell
- 7.The wind, furnace blower and stack effect tend to pressurize some areas of the home and depressurize others.
- A.
True
- B.
False
- 8.The pressures created by stack effect is greatest at the ____________ points.
- A.
Highest and lowest
- B.
Mid
- 9.The wind is blowing at 40mph. The leeward side, facing away from the wind, is usually either ______________ or ______________.
- A.
Pressurized, neutral
- B.
Depressurized, neutral
- 10.What is the area between positive and negative pressure in a home called?
- A.
Neutral zone
- B.
Neutral pressure zone
- C.
Neutral pressure plane
- D.
Zero pressure zone
- 11.Exhaust fans and cloths dryers create a slight vacuum and therefor also move the neutral pressure plane _____.
- A.
Up
- B.
Down
- 12.Why does the neutral pressure plane move up when a cloth dryer is turned on?
- A.
The buildings interior space is under more negative pressure.
- B.
The buildings interior space is under more positive pressure.
- C.
The neutral pressure plane is always in the middle and never moves up or down.
- 13.A fan that forces air into the home moves the neutral pressure plane ____.
- A.
Up
- B.
Down
- 14.A hole near the neutral pressure plane of the home allows an ______________air leakage.
- A.
Minimal
- B.
Average
- C.
Excessive
- 15.The wind speed ____________ the higher from the ground you measure.
- A.
Decreases
- B.
Increases
- 16.Exhausts fans and cloth dryers move the neutral pressure plane up because more of the interior space is under negative pressure.
- A.
True
- B.
False
- 17.A fan that blows air into the home moves the neutral pressure plane up because more of the interior space is under positive pressure.
- A.
True
- B.
False
- 18.What does the acronym "MVG" stand for?
- A.
Maximum Ventilation Guideline
- B.
Minimum Ventilation Guideline
- 19.Indicate which of the following is NOT part of preparations and setup of a blower door test?
- A.
Closing primary windows and storm windows
- B.
Closing all interior doors
- C.
Disabling heaters and water heaters by turning down their thermostats.
- D.
Covering ashes in wood stoves and fireplaces with damp newspaper to prevent the ashes from being sucked into the home.
- E.
Shutting fireplace dampers, fireplace glass doors, wood stove dampers, wood stove air intakes.
- 20.CFM is the unit of measurement for cubic feet per minute. What does CFM50 refer as a read out from a blower door test.?
- A.
Cubic feet per minute divided by half of the air pressure in the home
- B.
Cubic feet per minute at 50 pascals of house pressure
- 21.A home must have sufficient air leakage or whole house ventilation.
- A.
True. Either one is very effective in providing the home with fresh air.
- B.
True. However air leakage is not desirable because it tends to over-ventilate the building in leaky zones and under ventilate in tighter zones.
- C.
False. Only whole house ventilation can provide adequate fresh air inside the home.
- 22.ASHRAE suggests a minimum ventilation rate of _____ CFM per person or 0.35 ACHn, whichever is greater.
- A.
1
- B.
15
- C.
30
- 23.ASHRAE suggests a minimum ventilation rate of 15 CFM per person or ____ ACHn, whichever is greater under natural conditions.
- A.
0.53
- B.
0.45
- C.
0.35
- 24.Home A has a MVG of 1000. Home B has a MVG of 3000. Indicate which of the following are factors that influence the MVGs in these single family homes.
- A.
Climate
- B.
Number of occupants
- C.
Building height
- D.
Shielding o the building from trees
- 25.You are auditing a single family home with four occupants living in it. The blower door flow reading is at 5000 CFM50. Which of the following would be a correct conclusion.
- A.
This is the minimum ventilation guideline set by ASHRAE is being met.
- B.
Whole house ventilation is recommended.
- C.
Carefully targeted air sealing should produce some energy savings.
- D.
Minimum ventilation guideline set by ASHRAE is not being met.
- E.
Thorough air sealing efforts should produce impressive energy savings.
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Sample QuestionIndependent auditing can best be described as:
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Sample QuestionThe audit step most likely to reveal the existence of contingent liabilities is?
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