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Building Materials

Building Materials
Brass is an alloy of

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

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Building Materials
Which one of the following polymers is obtained from condensation polymerization?

All of these
Phenol formaldehyde
Melamine-formaldehyde
Carbamide

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Building Materials
Which of the following is the purest form of iron?

Wrought iron
High carbon steel
Cast iron
Mild steel

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Building Materials
The main constituent of cement which is responsible for initial setting of cement is

tricalcium silicate
All of these
dicalcium silicate
tricalcium aluminate

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Building Materials
The cement becomes unsound by the presence of excess

Sulphur
Lime
Magnesia
All of these

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Building Materials
If the furnace is provided with insufficient fuel at low temperatures, the type of pig iron produced, is called

Grey or foundry pig
White or forge pig
Mottled pig
Bessemer pig

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