Civil Engineering - Concrete Technology

26. 

The bulk density of aggregates, is generally expressed as

A. tonnes/cubic metre
B. kg/cubic metre
C. kg/litre
D. g/cm3
E. none of these.

Answer: Option C

Explanation:

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27. 

The grade of concrete M 150 means that compressive strength of a 15 cm cube after 28 days, is

A. 100 kg/cm2
B. 150 kg/cm2
C. 200 kg/cm2
D. 250 kg/cm2
E. 300 kg/cm2

Answer: Option B

Explanation:

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28. 

Allowable shear strength of concrete, depends upon

A. shear strength
B. tensile strength
C. compressive strength
D. none of these.

Answer: Option A

Explanation:

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29. 

The most useless aggregate is one whose surface texture is

A. smooth
B. granular
C. glassy
D. honey combed and porous.

Answer: Option C

Explanation:

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30. 

To obtain a very high strength concrete, use very fine grained

A. Granite
B. Magnetite
C. Barite
D. Volcanic scoria.

Answer: Option A

Explanation:

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