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Building Materials

Building Materials
The fire clay contains pure

Magnesium
Oxide of iron
Hydrated aluminium silicate
Lime

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Building Materials
Linseed oil is used in paints as

Drier
Thinner
Base
Vehicle

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Building Materials
Plywood is made by bonding together thin layers of wood in such a way that the angle between grains of any layer to grains of adjacent layers is

90°
30°
0°
45°

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Building Materials
Iron ore may contain

Carbon
All listed here
Silicon
Phosphorus and manganese

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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

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

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Building Materials
If the furnace is provided with insufficient fuel at low temperatures, the type of pig iron produced, is called

Grey or foundry pig
White or forge pig
Bessemer pig
Mottled pig

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