Civil Engineering - Building Materials

41. 

The cracks caused by shrinkage of the exterior surface of the wood exposed to atmosphere, are called:

A. radial shakes
B. heart shakes
C. wind cracks
D. twisted fibres.

Answer: Option C

Explanation:

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

42. 

The process of decarbonising the pig iron completely and then adding proper percentage of carbon for manufacturing steel, is called

A. Cementation process
B. crucible process
C. Bessemer process
D. Open hearth process.

Answer: Option A

Explanation:

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

43. 

In paints, the pigment is responsible for

A. durability
B. colour
C. smoothness
D. glassy face
E. none of these.

Answer: Option B

Explanation:

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

44. 

The operation of removal of impurities or clay adhering to iron ores, is known as

A. dressing
B. calcination
C. roasting
D. smelting.

Answer: Option A

Explanation:

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

45. 

If water required for 1 bag of cement is 30 litres, the water cement ratio is :

A. 0.40
B. 0.50
C. 0.60
D. None of these.

Answer: Option C

Explanation:

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