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Building Materials

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

6 hours
30 minutes
1 hour
10 hours

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Building Materials
The usual percentages of clay and metal in cermet are:

70%, 30%
50%, 50%
80%, 20%
60%, 40%

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Building Materials
Calcination of iron ores is done

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

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Building Materials
Plywood is made from

Common timber
Asbestos sheets
Teak wood only
Bamboo fibre

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Building Materials
Le-Chatelier's device is used for determining the

Setting time of cement
Tensile strength of cement
Soundness of cement
Compressive strength of cement

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Building Materials
Which of the following represents a metamorphic rock?
(i) Slate
(ii) Shale
(iii) Quartzite

Only (iii)
All (i), (ii) and (iii)
Both (i) and (iii)
Both (ii) and (iii)

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