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Concrete Technology and Design MCQ - Multiple Choice Question and Answer

Concrete Technology and Design MCQ with detailed explanation for interview, entrance and competitive exams. Explanation are given for understanding.

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Question No : 15
Curing a concrete for long period ensures better

Volume stability
Strength
Water resistance
All the above

Question No : 16
Gypsum is added for

Colour
Strength
Controlling setting time
None of these

Question No : 17
The percentage of voids in cement is approximately

25 %
40 %
60 %
80 %

Question No : 18
To obtain a very high strength concrete, use very fine grained

Granite
Magnetite
Barite
Volcanic scoria

Question No : 19
Proper proportioning of concrete, ensures

Desired strength and workability
Desired durability
Water tightness of the structure
All the above

Question No : 20
Pick up the correct statement from the following:

The quality of water governs the strength of concrete
10% excess of water reduces the strength of concrete by 15%
30% excess of water reduces the strength of concrete by 50%
All the above

Question No : 21
Pick up the correct statement from the following:

Higher workability indicates unexpected increase in the moisture content
Higher workability indicates deficiency of sand
If the concrete mix is dry, the slump is zero
All the above