Residential Energy Audit - Chapter 2
(509).jpg "Residential Energy Audit - Chapter 2 - Quiz")
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 amount of heating energy needed by the home during the heating season is the sum of:
- A.
Heat transmission through the floor
- B.
Exterior walls
- C.
Ceiling
- D.
Air leakage
- E.
Solar radiation & Internal heat production
Correct Answer(s)
A. Heat transmission through the floor
B. Exterior walls
C. Ceiling
D. Air leakageExplanation
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- 2.
Total heating energy and total cooling energy does not include the inefficiencies of the heating & cooling system.
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
The statement is false because the total heating energy and total cooling energy do include the inefficiencies of the heating and cooling system. These inefficiencies can be due to factors such as heat loss or energy waste during the heating or cooling process. Therefore, the total energy consumption for heating and cooling includes both the actual energy used for heating and cooling and any inefficiencies in the system.Rate this question:
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- 3.
Identify the most likely older framing technique
- A.
A is characteristic of older homes.
- B.
B is characteristic of older homes.
Correct Answer
A. A is characteristic of older homes.Explanation
The explanation for the given correct answer is that option A is identified as the most likely older framing technique because it is stated that it is characteristic of older homes. This implies that option A has been commonly used in older homes, indicating its association with older framing techniques. On the other hand, option B does not have any information provided about its association with older homes, making it less likely to be the correct answer.Rate this question:
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- 4.
Choose the correct statements:
- A.
A is a drawing of platform framing
- B.
B is a drawing of platform framing
- C.
A is a drawing of balloon framing
- D.
B is a drawing of balloon framing
Correct Answer(s)
B. B is a drawing of platform framing
C. A is a drawing of balloon framingExplanation
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- 5.
In which one of the two drawings will the wall cavities most likely be connected to the to the attic and the basement?
- A.
A
- B.
B
Correct Answer
A. AExplanation
In drawing A, the wall cavities are most likely connected to the attic and the basement because there is a clear opening or pathway shown in the drawing that connects the cavities to both the attic and the basement. In drawing B, there is no such opening or pathway indicated, suggesting that the wall cavities are not connected to the attic and the basement.Rate this question:
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- 6.
In which one of the two drawings will you find pre-build roof trusses, platform framing and 4'x8' - sheets of plywood or OSB sheating material for walls, floors and ceiling?
- A.
A.
- B.
B.
Correct Answer
B. B.Explanation
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- 7.
A plane defined by insulation and an air barrier is known as an _________ ___________
Correct Answer
thermal boundaryExplanation
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- 8.
In hot climates energy efficient homes:
- A.
Block solar radiation with exterior shade such as trees
- B.
Reflective surfaces
- C.
Window shading
- D.
Have large cooling systems installed
Correct Answer(s)
A. Block solar radiation with exterior shade such as trees
B. Reflective surfaces
C. Window shadingExplanation
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- 9.
Balloon framed construction are often found in homes build before _____________.
- A.
1980
- B.
1960
- C.
1940
- D.
1900
Correct Answer
C. 1940Explanation
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- 10.
It is possible that you may find aspects of both platform frame construction and balloon frame construction in the same home.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
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- 11.
When considering building structural types, which of the following statements are true?
- A.
A = Planer structure
- B.
A = Skeletal structure
- C.
B = Skeletal structure
- D.
B = Planer structure
- E.
C = Skeletal/Planer Combination
Correct Answer(s)
B. A = Skeletal structure
D. B = Planer structure
E. C = Skeletal/Planer CombinationExplanation
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- 12.
The exterior walls of some homes are made completely from masonry materials: block, stone, brick or concrete. Indicate which of the following is also true about masonry materials.
- A.
Masonry materials have listed R-values.
- B.
The mass of masonry materials can slow heat transmission significantly
- C.
Neither of these are true
Correct Answer(s)
A. Masonry materials have listed R-values.
B. The mass of masonry materials can slow heat transmission significantlyExplanation
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- 13.
Building portrusions and indentations lead to an increased number of seams and surface area.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
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- 14.
Which of the following are known as points of weakness in a building structure?
- A.
Porches
- B.
Roof overhangs
- C.
Shafts containing chimneys and pipes
- D.
Indented doorways & windows
- E.
Crawl spaces and basements connecting the home to the outdoors
Correct Answer(s)
A. Porches
B. Roof overhangs
C. Shafts containing chimneys and pipes
D. Indented doorways & windows
E. Crawl spaces and basements connecting the home to the outdoorsExplanation
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- 15.
Outdoor air and indoor air can mingle
- A.
When wall cavities are partially or completely devoid of insulation.
- B.
When suspended ceilings are installed between floors.
- C.
Through attics and roof cavities
- D.
Where plumbing pipes and wiring enter the building.
- E.
Building cavities are used as ducts.
Correct Answer(s)
A. When wall cavities are partially or completely devoid of insulation.
B. When suspended ceilings are installed between floors.
C. Through attics and roof cavities
D. Where plumbing pipes and wiring enter the building.Explanation
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- 16.
Mobile home point of weakness are:
- A.
Suspended ceilings between floors
- B.
Torn or missing belly paper
- C.
Joints between the halves of double-section homes
- D.
Joints between the main structure and building additions.
- E.
Plumbing penetrations
Correct Answer(s)
B. Torn or missing belly paper
C. Joints between the halves of double-section homes
D. Joints between the main structure and building additions.
E. Plumbing penetrationsExplanation
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- 17.
Indicate which of the following portrutions , indentations, and penetratios are weakenesses found in multi family buildings?
- A.
Thermal bridging from steel and aluminum coponents.
- B.
Torn or missing belly paper
- C.
Protruding or recessed balconies, eaves, canopies and windows
- D.
Rooftop protrusions and penetrations, such as rooftop elevator shacks and air handlers
Correct Answer(s)
A. Thermal bridging from steel and aluminum coponents.
C. Protruding or recessed balconies, eaves, canopies and windows
D. Rooftop protrusions and penetrations, such as rooftop elevator shacks and air handlersExplanation
The weaknesses found in multi-family buildings include thermal bridging from steel and aluminum components, protruding or recessed balconies, eaves, canopies, and windows, as well as rooftop protrusions and penetrations like rooftop elevator shafts and air handlers. These weaknesses can lead to energy loss, structural vulnerabilities, and potential water infiltration, compromising the overall integrity and efficiency of the building.Rate this question:
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- 18.
Which of the following are common conduits for air leakage that allow indoor air and outdoor air to mix in multi family buildings?
- A.
Suspended ceilings, supply ducts in floor and ceiling cavities, building cavities used as return ducts
- B.
Elevator shafts, plumbing shafts
- C.
Chimneys, stairwells
Correct Answer(s)
A. Suspended ceilings, supply ducts in floor and ceiling cavities, building cavities used as return ducts
B. Elevator shafts, plumbing shafts
C. Chimneys, stairwellsExplanation
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- 19.
The rate of heat transmission depends on ___________ and ______________.
- A.
Location
- B.
Relative humidity
- C.
Thermal resistance
- D.
Surface area
- E.
Air leakage
Correct Answer(s)
C. Thermal resistance
D. Surface areaExplanation
The rate of heat transmission depends on two factors: thermal resistance and surface area. Thermal resistance refers to the material's ability to resist the flow of heat, with higher resistance resulting in slower heat transmission. Surface area plays a role as well, as a larger surface area allows for more heat to be transferred. Therefore, both thermal resistance and surface area are important considerations when determining the rate of heat transmission.Rate this question:
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- 20.
Air leakage in cubic feet of air per minute (CFM) depends on the _______________ and the _____________________.
- A.
Indoor and outdoor pressure differences
- B.
Indoor pressure differences
- C.
Surface area of the shell
- D.
Surface area of the holes of the shell.
Correct Answer(s)
A. Indoor and outdoor pressure differences
D. Surface area of the holes of the shell.Explanation
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- 21.
Windows are a bigger concern than doors because:
- A.
Significant surface area
- B.
Low thermal resistance
- C.
Door have a relative small combined service area
Correct Answer(s)
A. Significant surface area
B. Low thermal resistance
C. Door have a relative small combined service areaExplanation
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- 22.
During summer the main heat driving force is _________________.
- A.
Solar radiation
- B.
Outdoor and indoor temperature differences.
Correct Answer
A. Solar radiationExplanation
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- 23.
A building's thermal resistance determines how much heat transmits through the shell.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
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- 24.
When we say that insulation resists heat transmission , we mean it resists:
- A.
Convection
- B.
Radiation
- C.
Conduction
- D.
Non of these
Correct Answer(s)
A. Convection
B. Radiation
C. ConductionExplanation
Insulation resists heat transmission by resisting convection, radiation, and conduction. Convection is the transfer of heat through the movement of fluids or gases, radiation is the transfer of heat through electromagnetic waves, and conduction is the transfer of heat through direct contact. Insulation materials are designed to minimize these modes of heat transfer, thereby reducing the amount of heat that can pass through them.Rate this question:
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- 25.
In the case of an uninsulated wall cavity, __________________ and _________________ dominate heat transmission.
- A.
Radiation
- B.
Conduction
- C.
Convection
Correct Answer(s)
A. Radiation
C. ConvectionExplanation
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- 26.
What is the symbol used to compare the thermal conductivity of different material?
- A.
Kal
- B.
K
- C.
Kps
Correct Answer
B. KExplanation
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- 27.
Aluminum is the mot conductive common building material.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
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- 28.
Aluminum has the same thermal conductivity as steel.
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
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- 29.
One square foot of steel conducts the same amount of heat as: (assume the thickness of material is the same)
- A.
200 square feet of wood
- B.
50 square feet of concrete
- C.
1000 square feet of glass wool
Correct Answer(s)
A. 200 square feet of wood
B. 50 square feet of concrete
C. 1000 square feet of glass woolExplanation
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- 30.
Choose the correct k value (thermal conductivity) for Aluminum
- A.
117
- B.
17
Correct Answer
A. 117Explanation
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- 31.
Choose the correct k value (thermal conductivity) for steel
- A.
117
- B.
26
Correct Answer
B. 26Explanation
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- 32.
Indicate which list below correctly state the least to most conductive building materials.
- A.
Air, glass wool, wood, steel, rubber, aluminum
- B.
Wood, brick, glass, aluminum, steel
- C.
Concrete, glass, steel, aluminum
- D.
Glass wool, wood, glass, brick
Correct Answer
C. Concrete, glass, steel, aluminumExplanation
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- 33.
The k-value is the amount of heat (BTUs) that will flow each hour through a 1 square foot slab of material 1 inch thick, with a _______ deg temperature difference of between the two sides
- A.
10
- B.
2
- C.
1
Correct Answer
C. 1Explanation
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- 34.
Heat conduction rate depend on the thickness of the material. If material X is 1/2 inch think and has a k-value of 2k what would the k-value be if this material was 2 inches thick.
- A.
1/2k
- B.
1k
- C.
2k
Correct Answer
A. 1/2kExplanation
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- 35.
What is stack effect?
- A.
Cold air is forced out holes in the ceiling when warmer rises and push it upwards.
- B.
Warm air rises and leaves the home through holes in the ceiling.
- C.
When warm air leaves the home, cold air replaces it by entering the building through holes near the floor.
Correct Answer(s)
B. Warm air rises and leaves the home through holes in the ceiling.
C. When warm air leaves the home, cold air replaces it by entering the building through holes near the floor.Explanation
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- 36.
Which are true statements regarding windows?
- A.
Windows are often build in thermal flaws.
- B.
Windows are necessary for the residents mental health.
- C.
Most older windows have R-values rated between R-1 and R-3.
- D.
Newer windows have R ratings up to R-20.
- E.
Windows are a major source of solar heat gain.
Correct Answer(s)
A. Windows are often build in thermal flaws.
B. Windows are necessary for the residents mental health.
C. Most older windows have R-values rated between R-1 and R-3.
E. Windows are a major source of solar heat gain.Explanation
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- 37.
Indicate the true statement(s):
- A.
The building's window surface area determine the level of comfort and extent of energy problems associated with windows.
- B.
The window R-value determine the level of comfort and extent of energy problems associated with windows.
Correct Answer(s)
A. The building's window surface area determine the level of comfort and extent of energy problems associated with windows.
B. The window R-value determine the level of comfort and extent of energy problems associated with windows.Explanation
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- 38.
Select the correct statement(s):
- A.
Window air leakage is the single biggest contributor to energy and comfort problem in a building.
- B.
Window related discomfort comes mainly from a window's low radiant temperature and convection currents created by high heat transmittance.
- C.
Correct Answer
B. Window related discomfort comes mainly from a window's low radiant temperature and convection currents created by high heat transmittance.Explanation
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- 39.
A building's energy inspection and diagnosis include:
- A.
Blower door tests
- B.
Infrared scanners
- C.
Utility bills analysis
- D.
Heating efficiency testers
- E.
Energy savings predictions
Correct Answer(s)
A. Blower door tests
B. Infrared scanners
C. Utility bills analysis
D. Heating efficiency testers
E. Energy savings predictionsExplanation
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- 40.
Conditioned space includes the building's heated and cooled areas.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
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- 41.
The amount on air leakage depends on:
- A.
Air pressure inside and outside the building
- B.
The size of the holes through which air escapes the building.
Correct Answer(s)
A. Air pressure inside and outside the building
B. The size of the holes through which air escapes the building.Explanation
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- 42.
Unintentionally conditioned and unconditioned spaces may include attics and crawl spaces. These areas are also known as ______________ ________.
Correct Answer(s)
buffer zones
intermediate zonesExplanation
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- 43.
After an energy auditor's evaluation of an building, the thermal boundary may include:
- A.
Only conditioned spaces
- B.
Conditioned space and unconditioned space
Correct Answer
B. Conditioned space and unconditioned spaceExplanation
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- 44.
Factors involved in selecting a building's thermal boundary include:
- A.
The shell's existing insulation level
- B.
The effectiveness of existing air barriers.
- C.
Incorporating potential areas of future use within the thermal boundary,
Correct Answer(s)
A. The shell's existing insulation level
B. The effectiveness of existing air barriers.
C. Incorporating potential areas of future use within the thermal boundary,Explanation
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- 45.
Airflow carrying heat across the thermal boundary and around the insulation is a thermal __________________.
- A.
Boundary
- B.
Bypass
- C.
Bridge
- D.
Advantage
Correct Answer
B. BypassExplanation
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- 46.
When determining whether or not to include a crawl space within the thermal boundary, the following should be considered:
- A.
The ease and cost of air sealing and insulating the the floor versus air sealing and insulating the foundation walls.
- B.
In cold weather climates it is not cost effective to insulate the foundation walls.
- C.
In warm weather climates it is cost effective to insulate the foundation walls.
Correct Answer
A. The ease and cost of air sealing and insulating the the floor versus air sealing and insulating the foundation walls.Explanation
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- 47.
Energy auditors should use both energy-savings potential and practical considerations to decide whether to include the basement or crawl space within the thermal boundary.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
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- 48.
Colder climates favor insulating the the floor between the crawl space and the house because the ground is colder..
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
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- 49.
Warmer climates favor insulating the the floor between the crawl space and the house because the ground is colder.
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
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- 50.
In warmer climates, including the thermal boundary is favored because heat loss to the cooler ground may aid iin cooling the home.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
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