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Building Materials

Building Materials
The variety of pig iron used for the manufacture of steel by Bessemer process, is

White forge pig
Bessemer pig
Mottled pig
Grey pig

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Building Materials
The usual percentages of clay and metal in cermet are:

70%, 30%
50%, 50%
60%, 40%
80%, 20%

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Building Materials
The rocks having alumina or clay as their major constituents are known as

Argillaceous rocks
Siliceous rocks
Sedimentary rocks
Calcareous rocks

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Building Materials
Forge pig may be converted to wrought iron by

Pudding
Rolling
Shingling
Refining

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Building Materials
Galvanising means covering iron with a thin coat of

Zinc
Tin
Glaze
Coal tar

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Building Materials
The practical limit of moisture content achieved in air drying of timber is

25 %
35 %
5 %
15 %

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