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Building Materials

Building Materials
The variety of pig iron used for manufacture of wrought iron, is

Grey or foundry pig
Bessemer pig
Mottled pig
White forge pig

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Building Materials
Blister steel

Is full of fissures and cavities
Can be easily welded
All listed here
Is obtained by cementation process

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Building Materials
Brass is an alloy of

Copper and zinc
Tin and silver
Zinc and nickel
Zinc and lead

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Building Materials
Resins are

Soluble in spirit
Not soluble in water
Used in varnishes
Left behind on evaporation of oil

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Building Materials
Pick up the synthetic resin from the following:

Phenolic resin
Resorcinol resin
Urea resin
All of these

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Building Materials
The percentage of alumina in a good brick earth lies between

5 to 10 %
70 to 80 %
50 to 60 %
20 to 30 %

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