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Building Materials

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

10 hours
6 hours
30 minutes
1 hour

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Building Materials
Which of the following sedimentary rocks changes into quartzite by metamorphic action?

Lime stone
Sand stone
Shale
Gypsum

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Building Materials
Which of the following cements contains maximum percentage of dicalcium silicate?

Sulphate resisting cement
Low heat cement
Ordinary Portland cement
Rapid hardening cement

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Building Materials
Bitumen may be dissolved in

Carbon disulphide
Carbondioxide
Sodium chloride
Water

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Building Materials
For testing compressive and tensile strength of cement, the cement mortar is made by mixing cement and standard sand in the proportions of

1 : 6
1 : 4
1 : 2
1 : 3

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Building Materials
Calcination of iron ores is done

To remove moisture
To remove carbonic acid
By roasting in heaps
All listed here

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