Design of Concrete Structures Mcqs

This set of Civil Engineering Multiple Choice Questions & Answers (MCQs) focuses on “ Design of Concrete Structures ”. These Mcqs are chosen from a collection of most authoritative and best reference books on Civil Engineering. Our aim is to prepare an individual for competitive exams like NTS, GAT, ECAT, University and College entrance exams, Jobs and interviews. One should practice our MCQS to assimilate Design of Concrete Structures comprehensively.

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1.
Increase in the moisture content in concrete_________________?

Reduces the strength

Increases the strength

Does not change the strength

All of the above

Answer Discus (0)

2.
The relation between modulus of rupturefcr and characteristic strength of concrete fck is given by_______________?

Fcr=0.35Vf7

Fcr=0.57f7

Fcr=0.7Vf7

Fcr=1.2Vf7

Answer Discus (0)

3.
The approximate value of the ratio between direct tensile strength and flexural strength is_____________?

0.33

0.5

0.75

1.0

Answer Discus (0)

4.
Air entrainment in the concrete increases________________?

Workability

Strength

The effects of temperature variations

The unit weight

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5.
Workability of concrete is inversely pro¬portional to______________?

Time of transit

The air in the mix

Size of aggregate

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6.
The property of fresh concrete, in which the water in the mix tends to rise to the surface while placing and compacting, is called________________?

Segregation

Bleeding

Bulking

Creep

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7.
To determine the modulus of rupture, the size of test specimen used is_______________?

150 x150 x500 mm

100 x100 x700 mm

150 x150 x700 mm

100 x100 x500 mm

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9.
Modulus of rupture of concrete is a measure of_______________?

Flexural tensile strength

Direct tensile strength

Compressive strength

Split tensile strength

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10.
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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11.
As compared to ordinary portland cement, high alumina cement has______________?

Higher initial setting time but lower final setting time

Lower initial setting time but higher final setting time

Higher initial and final setting times

Lower initial and final setting times

Answer Discus (0)

14.
Finer grinding of cement______________?

Affects only the early development of strength

Affects only the ultimate strength

Both (A. and (B.

Does not affect the strength

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15.
Poisson’s ratio for concrete_______________?

Remains constant

Increases with richer mixes

Decreases with richer mixes

None of the above

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