Civil Engineering MCQs

Page No. 261

For concreting of heavily reinforced sections without vibration, the workability of concrete expressed as compacting factor should be________________?


a0.75-0.80


b0.80-0.85


c0.85 – 0.92


dabove 0.92


View Answer above 0.92

Maximum quantity of water needed per 50 kg of cement for M 15 grade of concrete is_______________?


a28 liters


b30 liters


c32 liters


d34 liters


View Answer 32 liters

Minimum grade of concrete to be used in reinforced concrete as per IS:456-1978 is_____________?


aM15


b M20


cM 10


dM25


View Answer M15

If the permissible stress in steel in tension is 140 N/mm2, then the depth of neutral axis for a singly reinforced rectangular balanced section will be___________________?


a0.35 d


b0.40 d


c0.45 d


d dependent on grade of concrete also


View Answer 0.40 d

If the depth of actual neutral axis in a beam is more than the depth of critical neutral axis, then the beam is called________________?


abalanced beam


b under-reinforced beam


cover-reinforced beam


dnone of the above


View Answer over-reinforced beam

If a beam fails in bond, then its bond strength can be increased most economi-cally by___________?


aincreasing the depth of beam


busing thinner bars but more in number


cusing thicker bars but less in number


d providing vertical stirrups



The compressive strength of 100 mm cube as compared to 150 mm cube is always_______________?


a less


bmore


cequal


dnone of the above


View Answer more

The fineness modulus of fine aggregate is in the range of______________?


a 2.0 to 3.5


b3.5 to 5.0


c5.0 to 7.0


d6.0 to 8.5


View Answer 2.0 to 3.5

The factor of safety for______________?


asteel and concrete are same


bsteel is lower than that for concrete


csteel is higher than that for concrete


dnone of the above



Poisson’s ratio for concrete_______________?


a remains constant


bincreases with richer mixes


cdecreases with richer mixes


dnone of the above



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