Civil Engineering - Building Materials

31. 

Pick up the correct statement from the following: Method of sawing timber

A. tangentially to annual rings, is known as tangential method.
B. in four quarters such that each board cuts annual rings at angles not less than 45°, is known as quarter sawing method.
C. cut out of quarter logs, parallel to the medullary rays and perpendicular to annual rings, is known as radial sawing.
D. all the above.

Answer: Option D

Explanation:

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32. 

Clay and silt content in a good brick earth must be at least

A. 50%
B. 40%
C. 30%
D. 25%
E. 20%.

Answer: Option A

Explanation:

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33. 

Bessemer process is used for the manufacture of

A. Pig iron
B. cast iron
C. Wrought iron
D. Steel.

Answer: Option D

Explanation:

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34. 

The portion of the brick without a triangular corner equal to half the width and half the length, is called

A. closer
B. queen closer
C. king closer
D. squint brick.

Answer: Option C

Explanation:

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35. 

The standard size of masonry bricks, is

A. 18 cm x 8 cm x 8 cm
B. 19 cm x 9 cm x 9 cm
C. 20 cm x 10 cm x 10 cm
D. 21 cm x 11 cm x 11 cm
E. none of these.

Answer: Option B

Explanation:

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