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The specific gravity of marble, is
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The usual percentages of clay and metal in cermet are:
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A well seasoned timber may contain moisture up to
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The cast iron when heated to red heat with powdered red haematite in an oven for increasing its toughness, is converted to
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The minimum compressive strength of 1st class bricks should be
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Portland cement manufactured from pure white chalk and clay but free from iron-oxide, is known as
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Knots in timber are
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The proportions of charcoal, saltpetre and sulphur in gun powder by weight, are respectively:
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The standard size of masonry bricks, is
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The lime which contains mainly calcium oxide and slacks with water, is
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