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.


ddoes not affect the strength



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


d lower initial and final setting times



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


arounded


belongated


c angular


dall of the above


View Answer rounded

Modulus of rupture of concrete is a measure of_______________?


aflexural tensile strength


b direct tensile strength


ccompressive strength


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


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


dcreep


View Answer bleeding

Workability of concrete is inversely pro¬portional to______________?


atime of transit


b‘vater-cement ratio


cthe air in the mix


dsize of aggregate


View Answer time of transit

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