Civil Engineering - Building Materials

21. 

Stones used for rubble masonry must be

A. soft
B. hard
C. light
D. heavy.

Answer: Option B

Explanation:

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22. 

Index number expressing the relative sizes of both coarse and fine aggregates, is called

A. proportioning of aggregates
B. fineness modulus
C. grading of aggregates
D. none of these.

Answer: Option B

Explanation:

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23. 

Dolomite is a lime stone which contains carbonate of magnesia upto

A. 15%
B. 20%
C. 25%
D. 35%
E. 45%.

Answer: Option E

Explanation:

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24. 

Priming consists of

A. one part of white lead, 8 parts of chalk and four parts of twice boiled linseed oil
B. 8 parts of white lead, one part of chalk and four parts of twice boiled linseed oil
C. one part of white lead, 8 parts of chalk and one part of linseed oil
D. none to these.

Answer: Option A

Explanation:

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25. 

The portion of the brick cut across its width and having its length equal to that of a full brick, is known as

A. closer
B. queen closer
C. king closer
D. prince closer
E. none of these.

Answer: Option B

Explanation:

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