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Building Materials

Building Materials
The stones obtained by blasting are used as

All listed here
Road metal
Ballast in railways
Aggregates for concrete

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Building Materials
The main constituent which imparts hydraulicity to hydraulic lime is

Water
Silica
Clay
Calcium oxide

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Building Materials
Pick up the constituent of good brick earth whose excess causes the raw bricks shrink and warp during drying and burning, from the following:

Magnesia
Lime
Alumina
Iron-oxide

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Building Materials
Number of bricks required for one cubic metre of brick masonry is

300
500
400
200

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Building Materials
Percentage of silica in a good brick earth lies between

50 to 60 %
20 to 30 %
70 to 80 %
5 to 10 %

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Building Materials
Which of the following ingredients of the brick earth enables the brick to retain its shape?

Magnesia
Alumina
Iron
Silica

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