Question

True/False Indicate whether the statement is true or false. 1. Heat is transferred through materials from the warm side to the cool side. 2. Dark materials reject radiant energy and shiny materials absorb it. 3. Most rigid insulation panels are manufactured from non-flammable materials. 4. Sprayed-on insulation can be used to increase fire resistance and moisture resistance. 5. Enamels, primers, latex paints, and oil-based paints may all serve as vapor barriers. 6. Waterproofing coatings and membranes are self-supporting. 7. Synthetic sheet membranes tend to rupture when an underlying soil settles. 8. The actual tensile strength of glass is greater than the theoretical tensile strength. 9. Low-E (low-emissivity) coatings have ow visible light transmission. 10. The total heat gain of a window is the sum of solar heat gain and convective heat gain. 11. Glass blocks are fragile and provide little security. 12. Hollow metal frames are supplied knocked down or preassembled. 13. Wood and plastic doors cannot have glass or louvered openings 14. When designing a glazed storefront it is essential to include wind load calculations. Lower

Answer 1

1. TRUE. Heat always flow from higher temperature to lower temperature, untill unless any external work is provided.

2. FALSE- Dark materials do not reject radiant energy but they absorb them & shiny white materials dont absorb radiant enegy.

3.TRUE- Insulation panel are made from non inflammable materials

4. TRUE-Spray on insulation  produces a high thermal insulating value with virtually no air infiltration.

5. TRUE- Above mentioned paints serves as vapour barrier.

6. FALSE-  Waterproofing coatings and membranes are not self supporting but must be bonded to the surface.

7.TRUE -Membrane tends to rupture when underlying soils or dirts settle.

8.FALSE- Actual tensile strength is lower than theoritical.

9.FALSE- Lower emmisivity menas higher reflectivity.

10. FALSE- Low-E coatings have been developed to minimize the amount of ultraviolet and infrared light that can pass through glass without compromising the amount of visible light that is transmitted.

11.FALSE- Glass block windows will provide extra protection as they cannot be broken easily or dismantled easily,

12.TRUE.

13.FALSE- Even wood door can have louvered opening

14.TRUE