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Building Materials

Building Materials
Pig iron is manufactured from the ores by

Dressing
Smelting
Calcination and roasting
All of these

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Building Materials
Cast steel is manufactured by

Bessemer process
Crucible process
Open hearth process
Cementation process

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Building Materials
The moisture content in a well seasoned timber is

100 %
15 % to 20 %
4 % to 6 %
10 % to 12 %

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

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Building Materials
A well seasoned timber may contain moisture up to

4 to 6 %
6 to 8 %
10 to 12 %
8 to 10 %

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Building Materials
Most commonly used solvent in oil paints, is

Coal tar
Spirit
Turpentine
Petroleum

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