Civil Engineering - Building Materials
Exercise :: Building Materials - Section 3
| 31. |
Pick up correct statement from the following: |
| A. |
Fibre boards are used for thermal and acoustic control | | B. |
Fibre boards are used for light weight standing members | | C. |
Fibre boards are obtained by impregnating a resin product on fibres | | D. |
all the above. |
Answer: Option D
Explanation:
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| 32. |
Quartzite, a metamorphic stone is |
| A. |
hard | | B. |
brittle | | C. |
crystalline | | D. |
compact | | E. |
All the above. |
Answer: Option E
Explanation:
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| 33. |
Pick up the correct statement from the following: |
| A. |
Plastics have generally low melting point | | B. |
The coefficient of thermal expansion of plastics is about three times than that of steel | | C. |
The acoustical boards prepared by impregnating fibre-glass with phenolic resins has absorption coefficient of about 0.67 | | D. |
All the above. |
Answer: Option D
Explanation:
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| 34. |
Dextrin is |
| A. |
animal glue | | B. |
starch glue | | C. |
albumin glue | | D. |
rubber based adhesive | | E. |
none to these. |
Answer: Option D
Explanation:
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| 35. |
Formula for quick lime, is |
| A. |
CaCO3 | | B. |
CaO | | C. |
CO3CO2 | | D. |
none to these. |
Answer: Option B
Explanation:
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