CNST 251 Chapter 5 || Questions and 100% Verified Answers.
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CNST 251 Chapter 5
Institution
CNST 251 Chapter 5
International Energy Conservation Code correct answers IECC is an acronym for
Btu correct answers The unit for the measure of energy in the U.S. system of units is...
Joule correct answers The unit for the measure of energy in the SI sytem of units is...
conduction correct answers Within a...
CNST 251 Chapter 5 || Questions and 100% Verified
Answers.
International Energy Conservation Code correct answers IECC is an acronym for
Btu correct answers The unit for the measure of energy in the U.S. system of units is...
Joule correct answers The unit for the measure of energy in the SI sytem of units is...
conduction correct answers Within a solid, the mode of heat transfer is by...
Both (b) and (c) (convection, radiation) correct answers Within an air space (cavity), the mode of
heat transfer is primarily by...
False correct answers Air is a good thermal insulator, provided that it exist in large volumes. T or
F
None of the above (1.0, 0.5, 6.0, 8.0) correct answers The R-value of a 2-in thick material is 4.0.
What is the R-value of the same material if it thickness is 1 in?
RSI-value correct answers The R-value of a building assembly in the SI system is referred to as...
False correct answers A wet or moist material provides higher R-value than if the same material
is dry. T or F
none of the above (makes the material: noncombustible, economical, resistant to decay, increases
strength) correct answers One of the main reasons for using HCFC gas in some insulating
materials is that it...
True correct answers Insulating materials that contain HCFC gas within their cells have a higher
R-value than those that contain air within their cells. T or F
All of the above (extruded polystyrene, polyisocyanurate, polyurethane) correct answers Which
of the following insulating material contains HCFC gas within their voids?
Polyisocyanurate correct answers For the same thickness, which of the following materials has
the highest R-value?
Gypsum correct answers For the same thickness, which of the following materials has the
smallest R-value?
none of the above (10 in, 50 in, 5 in, 2.5 in) correct answers The R-value of a 1-in thick extruded
polystyrene board is 5.0 If the R-value of a 1 in thick brick wall is 0.2, how thick should the
brick wall be to equal the R-value of 1-in thick extruded polystyrene?
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