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Building Materials

Building Materials
As per IS specifications, the maximum final setting time for ordinary Portland cement should be

1 hour
30 minutes
6 hours
10 hours

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Building Materials
The specific gravity of marble, is

2.66
2.6
2.72
2.5

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Building Materials
The cast iron when heated to red heat with powdered red haematite in an oven for increasing its toughness, is converted to

Mottled cast iron
Grey cast iron
White cast iron
Toughed cast iron

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Building Materials
Clay and silt content in a good brick earth must be at least

30 %
20 %
50 %
40 %

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Building Materials
The normal consistency of ordinary Portland cement is about

30 %
40 %
10 %
20 %

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Building Materials
The nominal size of the modular brick is

190 mm × 90 mm × 80 mm
200 mm × 200 mm × 100 mm
200 mm × 100 mm × 100 mm
190 mm × 190 mm × 90 mm

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