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Building Materials

Building Materials
The proportions of lime and sand in the mortar normally used in brick construction are

1 : 8
1 : 4
1 : 6
1 : 2

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Building Materials
Lime concrete is generally used for

Flooring at ground level
Both (A) and (B)
Wall foundations
Neither (A) nor (B)

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Building Materials
Which of the following pairs gives a correct combination of the useful and harmful constituents respectively of a good brick earth?

Alumina and iron
Silica and alkalies
Alkalies and magnesium
Lime stone and alumina

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Building Materials
For testing compressive strength of cement, the size of cube used is

150 mm
100 mm
70.6 mm
50 mm

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Building Materials
Three basic raw materials which are needed in large quantities for production of steel are

Iron ore, carbon and lime stone
Iron ore, coal and lime stone
Iron ore, coal and sulphur
Iron ore, carbon and sulphur

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Building Materials
The main ingredients of Portland cement are

Silica and alumina
Lime and silica
Lime and iron
Lime and alumina

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