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Building Materials

Building Materials
The age of a tree can be known by examining

Heart wood
Medullary rays
Annular rings
Cambium layer

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Building Materials
Addition of pozzolana to ordinary Portland cement increases

Bleeding
Permeability
Heat of hydration
Shrinkage

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Building Materials
During smelting process, the combination of fuel in the furnace

Carbon dioxide with carbon forms carbon mono-oxide
Carbon mono-oxide reacts with Fe2O3 to form iron and liberates CO2
All listed here
Forms carbon dioxide

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Building Materials
Pick up the correct statement regarding low heat cement from the following:

It possesses less compressive strength
Its initial setting time is about one hour
All listed here
Its final setting time is about 10 hours

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Building Materials
Which of the following cements is suitable for use in massive concrete structures such as large dams?

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

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Building Materials
Slate is formed by metamorphic action on

Lime stone
Sand stone
Shale
Granite

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