Civil Engineering - Building Materials

6. 

Pick up the correct statement from the following:

A. The average crushing strength of hand moulded bricks is 6000 t/m2
B. The average tensile strength of hand moulded brick is 200 t/m2
C. The average shearing strength of hand moulded brick is 600 t/m2
D. All the above.

Answer: Option D

Explanation:

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7. 

The cracks which extend from bark towards the sap wood in the cross section of a tree, are called

A. radial shakes
B. star shakes
C. heart shakes
D. cup shakes.

Answer: Option B

Explanation:

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8. 

Sea sand used in structures causes

A. dampness
B. efflorescence
C. disintegration
D. All of these.

Answer: Option D

Explanation:

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9. 

The compound of Portland cement which reacts immediately with water and also sets first is

A. Tri-calcium silicate
B. Di-calcium silicate
C. Tri-calcium aluminate
D. Tetra calcium alumino ferrite.

Answer: Option C

Explanation:

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10. 

Refractory bricks resist

A. high temperature
B. chemical action
C. dampness
D. all the above.

Answer: Option A

Explanation:

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