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Concrete Technology and Design MCQ Question with 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 : 22
While compacting the concrete by a mechanical vibrator, the slump should not exceed

2.5 cm
5.0 cm
7.5 cm
10 cm
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Question No : 23
In a counterfort retaining wall, the main reinforcement in the stem at mid span is provided on

Front face only
Inner face only
Both front face and inner face
None of the above
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Question No : 24
If the depth of actual neutral axis in a beam is more than the depth of critical neutral axis, then the beam is called

Balanced beam
Under-reinforced beam
Over-reinforced beam
None of the above
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Question No : 25
The depth of footing for an isolated column is governed by (i) Maximum bending moment (ii) Shear force (iii) Punching shear The correct answer is

Only (i)
(i) and (ii)
(i) and (iii)
All (i), (ii) and (iii)
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Question No : 26
The individual variation between test strength of sample should not be more than

± 5 % of average
± 10 % of average
± 15 % of average
± 20 % of average
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Question No : 27
In order to obtain the best workability of concrete, the preferred shape of aggregate is

Rounded
Elongated
Angular
All of the above
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Question No : 28
Pick up the correct statement from the following:

Water cement paste hardens due to hydration
During hardening cement binds the aggregates together
Cement provides strength, durability and water tightness to the concrete
All the above
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