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

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b0.80-0.85

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c0.85 – 0.92

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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

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b30 liters

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c32 liters

✓


d34 liters

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View Answer 32 liters

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


aM15

✓


b M20

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cM 10

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dM25

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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

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b0.40 d

✓


c0.45 d

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d dependent on grade of concrete also

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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

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b under-reinforced beam

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cover-reinforced beam

✓


dnone of the above

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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

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busing thinner bars but more in number

✓


cusing thicker bars but less in number

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d providing vertical stirrups

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


a less

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bmore

✓


cequal

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dnone of the above

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View Answer more

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


a 2.0 to 3.5

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b3.5 to 5.0

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c5.0 to 7.0

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d6.0 to 8.5

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View Answer 2.0 to 3.5

The factor of safety for______________?


asteel and concrete are same

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bsteel is lower than that for concrete

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csteel is higher than that for concrete

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dnone of the above

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Poisson’s ratio for concrete_______________?


a remains constant

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bincreases with richer mixes

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cdecreases with richer mixes

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dnone of the above

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