Building Materials - Section 1 (6)

Directions to Solve

Building Materials - Section 1

In the following section you will find all the necessary and important
MCQs based on Building Material. You can solve all the MCQs and can test your skills and
learning abilities.

41.

In the cement the compound quickest to react with water, is

A.	Tricalcium aluminate
B.	Tetra-calcium alumino-ferrite
C.	Tricalcium silicate
D.	Dicalcium silicate.

Answer: Option A

Explanation:

No answer description available for this question. Let us discuss.

42.

In the method of condensation polymerization,

A.	low-molecular substances are removed from the high molecular substance
B.	the reaction proceeds with an evolution of ammonia
C.	the reaction proceeds with an evolution of hydrogen chloride
D.	all the above.

Answer: Option D

Explanation:

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43.

Bitumen felt

A.	is used as water proofing material
B.	is used as damp proofing material
C.	is made from bitumen and hessian fibres
D.	all the above.

Answer: Option D

Explanation:

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44.

Elastomers can extend upto

A.	five times their original dimensions
B.	seven times their original dimensions
C.	ten times their original dimensions
D.	three times their original dimensions.

Answer: Option C

Explanation:

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45.

Ultimate strength to cement is provided by

A.	Tricalcium silicate
B.	Di-calcium silicate
C.	Tri-calcium aluminate
D.	Tetra calcium alumino ferrite.

Answer: Option B

Explanation:

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46.

Pick up the correct statement from the following:

A.	For thin structures subjected to wetting and drying, the water cement ratio should be 0.45
B.	For mass concrete structures subjected to wetting and drying, the water ratio should be 0.55
C.	For thin structures which remain continuously under water, the water-cement ratio by weight should be 0.55
D.	For massive concrete structures which remain continuously under water, the water cement ratio by weight should be 0.65
E.	All the above.

Answer: Option E

Explanation:

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47.

Pick up the polymineralic rock from the following:

A.	Quartz sand
B.	Pure gypsum
C.	Magnesite
D.	Granite
E.	None of these.

Answer: Option D

Explanation:

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48.

Wrought iron contains carbon upto

A.	0.25%
B.	1.0%
C.	1.5%
D.	2%.

Answer: Option A

Explanation:

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