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Building Materials

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

20 %
50 %
40 %
30 %

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Building Materials
To retard the initial setting time of cement, the compound responsible, is

Gypsum
Tri-calcium silicate
Di-calcium silicate
Tri-calcium aluminate

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Building Materials
Turpentine oil is used in paints as

Drier
Vehicle
Base
Thinner

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Building Materials
Chlorite, a green colour mineral is mainly derived from the decomposition of

Biotite
All of these
Hornblende
Augite

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Building Materials
Shingle is

Decomposed laterite
Crushed granite
Water bound pebbles
Air weathered rock

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Building Materials
Proper amount of entrained air in concrete results in (i) Better workability (ii) Better resistance to freezing and thawing (iii) Lesser workability (iv) Less resistance to freezing and thawing

(ii) and (iii)
(i) and (ii)
(iii) and (iv)
(i) and (iv)

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