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Building Materials

Building Materials
Plywood is normally available

3 mm to 4 mm thick
2 mm thick
1 mm thick
2 to 3 mm thick

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Building Materials
If the iron ore contains clay as an impurity, the flux added during calcination, is

Clay
Argillaceous iron ore
Lime stone
All listed here

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Building Materials
Softer variety of steel may be obtained by

Open hearth process
Crucible process
Bessemer process
Cementation process

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Building Materials
The yield strength and tensile strength of low carbon steel may be improved by the addition of

Nickel
Manganese
Chromium
Vanadium

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Building Materials
Which of the following trees yields hard wood?

Deodar
Pine
Chir
Shishum

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

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