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Building Materials

Building Materials
Whitworth compressed steel is obtained when molten steel is subjected to a pressure of

5 kg/mm²
13 kg/mm²
15 kg/mm²
9 kg/mm²

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

Chromium
Nickel
Vanadium
Manganese

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Building Materials
During smelting process, the combination of fuel in the furnace

All listed here
Carbon dioxide with carbon forms carbon mono-oxide
Forms carbon dioxide
Carbon mono-oxide reacts with Fe2O3 to form iron and liberates CO2

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Building Materials
The minimum compressive strength of 2nd class bricks should be

120 kg/cm²
75 kg/cm²
100 kg/cm²
90 kg/cm²

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

Calcareous rocks
Argillaceous rocks
Siliceous rocks
Sedimentary rocks

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Building Materials
The slump recommended for mass concrete is about

25 mm to 50 mm
125 mm to 150 mm
50 mm to 100 mm
100 mm to 125 mm

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