What happens when chalk is used? - Concrete Technology Quiz

Civil Engineering : Concrete Technology - Quiz(MCQ)

What happens when chalk is used?

It must be sieved and fed into a rotating dish known as a granulator

It must be finely broken up and dispersed in water in a wash mill

It must be blasted, then crushed, usually in two smaller crushers

Crushed raw materials are put into a grinding mill, where they are dried and reduced to a fine powder

Correct Answer : It must be finely broken up and dispersed in water in a wash mill

Explanation : Chalk is finely broken up and disseminated in water in a wash mill when it is utilized. In a similar manner, the clay is broken up and combined with water, usually in a wash mill.

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Which of the following compound is used for fine polishing?

Nitric oxide

Iron oxide

Silicon carbide

Aluminum oxide

Correct Answer : Option (D) : Aluminum oxide

Explanation : Powder form of aluminum oxide is used for fine polishing process. It is surface treatment process.

Maximum nominal size of aggregates to be used in concrete may be as large as possible within the limits prescribed by __________

IS 456-2010

IS 456-2000

IS 465-2000

IS 513-1999

Correct Answer : Option (B) : IS 456-2000

Explanation : Option can be eliminated because there is no such code. Maximum nominal size of aggregates to be used in concrete may be as large as possible within the limits prescribed by IS 456:2000.

Air contents should be _________ % by volume.

1-2

2-3

3-4

4-5

Correct Answer : Option (C) : 3-4

Explanation : This type of cement was first of all developed in U.S.A. It is recommended that air contents should be 03-04 % by volume.