Civil Engineering MCQs

Page No. 262

Finer grinding of cement______________?


a affects only the early development of strength

✓


baffects only the ultimate strength

✖


cboth (A. and (B.

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ddoes not affect the strength

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1% of voids in a concrete mix would reduce its strength by about______________?


a5%

✓


b10 %

✖


c15%

✖


d20%

✖


View Answer 5%

Bulking of sand is maximum if moisture content is about____________?


a2 %

✖


b4%

✓


c6%

✖


d10%

✖


View Answer 4%

As compared to ordinary portland cement, high alumina cement has______________?


ahigher initial setting time but lower final setting time

✓


blower initial setting time but higher final setting time

✖


c higher initial and final setting times

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d lower initial and final setting times

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In order to obtain the best workability of concrete, the preferred shape of aggregate is_______________?


arounded

✓


belongated

✖


c angular

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dall of the above

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View Answer rounded

Modulus of rupture of concrete is a measure of_______________?


aflexural tensile strength

✓


b direct tensile strength

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ccompressive strength

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d split tensile strength

✖



The percentage of voids in cement is approximately_______________?


a 25%

✖


b40%

✓


c60%

✖


d80%

✖


View Answer 40%

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


a150 x150 x500 mm

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b100 x100 x700 mm

✖


c150 x150 x700 mm

✓


d100 x100 x500 mm

✖


View Answer 150 x150 x700 mm

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


asegregation

✖


bbleeding

✓


cbulking

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dcreep

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View Answer bleeding

Workability of concrete is inversely pro¬portional to______________?


atime of transit

✓


b‘vater-cement ratio

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cthe air in the mix

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dsize of aggregate

✖


View Answer time of transit

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