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Building Materials

Building Materials
The percentage of alumina and silica in good fire clay vary respectively is

30, 70
All of these
35, 65
25, 75

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Building Materials
The maximum quantity of calcium chloride used as an accelerator in cement in percentage by weight of cement is

1
4
2
3

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Building Materials
The trunk of tree left after cutting all the branches is known as

Plank
Log
Batten
Baulk

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Building Materials
Initial setting time of cement for asbestos cement products should be not less than

75 minutes
50 minutes
90 minutes
30 minutes

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

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

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Building Materials
The minimum compressive strength of 1st class bricks should be

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

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