Civil Engineering - Building Materials

46. 

For the manufacture of plywood, veneers are placed so that grains of adjacent veneers

A. run at right angles
B. parallel
C. inclined at 45°
D. inclined at 60°.

Answer: Option A

Explanation:

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47. 

A 1st class brick immersed in water for 24 hours, should not absorb water (by weight) more than

A. 10%
B. 15%
C. 20%
D. 25%
E. 5%.

Answer: Option C

Explanation:

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48. 

The proportions of charcoal, saltpetre and sulphur in gun powder by weight, are respectively:

A. 15, 75, 10
B. 75, 10, 15
C. 10, 15, 75
D. 10, 75, 15.

Answer: Option A

Explanation:

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49. 

Geologically, marble is known as

A. sedimentary rock
B. igneous rock
C. metamorphic rock
D. stratified rock.

Answer: Option C

Explanation:

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