Civil Engineering - Building Materials
Exercise :: Building Materials - Section 7
| 16. |
The percentage of alumina and silica in good fire clay vary respectively is |
| A. |
25, 75 | | B. |
30, 70 | | C. |
35, 65 | | D. |
All of these. |
Answer: Option A
Explanation:
|
| 17. |
The term frog means |
| A. |
an apparatus to lift the stone | | B. |
a depression on a face of brick | | C. |
vertical joint in a brick work | | D. |
soaking brick in water. |
Answer: Option B
Explanation:
|
| 18. |
Asphalt is obtained from |
| A. |
petroleum distillation | | B. |
bitumen distillation | | C. |
plastic distillation | | D. |
none of these. |
Answer: Option A
Explanation:
|
| 19. |
To retard the initial setting time of cement, the compound responsible, is |
| A. |
Tricalcium silicate | | B. |
Gypsum | | C. |
Di-calcium silicate | | D. |
Tri calcium aluminate. |
Answer: Option B
Explanation:
|
| 20. |
Dorry's testing machine is used for |
| A. |
crushing test of stone | | B. |
hardness test of stone | | C. |
impact test of stone | | D. |
water absorption test. |
Answer: Option B
Explanation:
|
