Civil Engineering - Building Materials

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:

No answer description available for this question. Let us discuss.

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:

No answer description available for this question. Let us discuss.

18. 

Asphalt is obtained from

A. petroleum distillation
B. bitumen distillation
C. plastic distillation
D. none of these.

Answer: Option A

Explanation:

No answer description available for this question. Let us discuss.

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:

No answer description available for this question. Let us discuss.

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:

No answer description available for this question. Let us discuss.