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Civil Engineering - Building Materials

Exercise : Building Materials - Section 5
11.
When a brick is immersed in water for 24 hours and then dried, if
no grey or white deposits appear on the surface, the brick is free from soluble salts
10 per cent surface is covered with grey or white deposits, the brick has slight efflorescence
50 per cent surface is covered with grey or white deposits, the brick has serious efflorescence
All the above.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
12.
In arches, stratified stones are placed so that their planes are
parallel
perpendicular
radial
none of these.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
13.
Pick up the correct statement from the following:
Acid test is done to find out the weathering quality of stones
Attrition test is done to find out the rate of wear of stones which are used in road construction
Crushing test is done to find out the compressive strength of the stone
Impact test is done to determine toughness of a stone
All the above.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
14.
The fire clay contains pure
lime
oxide of iron
hydrated aluminium silicate
magnesium.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
15.
Pick up the correct characteristic of Pyroxene from the following:
It forms octagonal crystals
It converts to chlorine by hydration
Its density is 2.3 to 3.6 g/cm2
Its hardness is 5 to 6
All the above.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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