Under normal conditions using an ordinary cement, the period of removal of the form work, is :

Civil Engineering : Concrete Technology - Quiz(MCQ)

7 days for beam soffits

14 days for bottom slabs of spans 4.6 m and more

21 days for bottom beams over 6 m spans

All of the above

Correct Answer : All of the above

Explanation : * 7 days for beam soffits
* 14 days for bottom slabs of spans 4.6 m and more
* 21 days for bottom beams over 6 m spans
* 2 days for vertical sides of columns

Recently Updated in Concrete Technology Questions

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.