Civil Engineering MCQs

Page No. 220

If a rectangular pre-stressed beam of an effective span of 5 meters and carrying a total load 3840 kg/m, is designed by the load balancing method, the central dip of the parabolic tendon should be_________________?


a5 cm


b10 cm


c15 cm


d 20 cm


View Answer 10 cm

The reinforced concrete beam which has width 25 cm, lever arm 40 cm, shear force 6t/cm2, safe shear stress 5 kg/cm2 and B.M. 24 mt________________?


aIs safe in shear


b Is unsafe in shear


c Is over safe in shear


dNeeds redesigning


View Answer Is unsafe in shear

A circular slab subjected to external loading, deflects to form a_________________?


aSemi-hemisphere


bEllipsoid


cParaboloid


dNone of these


View Answer Paraboloid

The radius of a bar bend to form a hook, should not be less than_______________?


aTwice the diameter


bThrice the diameter


cFour times the diameter


d Five times the diameter


View Answer Twice the diameter

If a bent tendon is required to balance a concentrated load W at the centre of the span L, the central dip h must be at least________________?


aWL /P


b WL/2P


cWL/3P


dWL/4P


View Answer WL/4P

If W is total load per unit area on a panel, D is the diameter of the column head, L is the span in two directions, then the sum of the maximum positive bending moment and average of the negative bending moment for the design of the span of a square flat slab, should not be less than________________?


aWL/12 (L – 2D/3)²


bWL/10 (L + 2D/3)²


cWL/10 (L – 2D/3)²


dWL/12 (L – D/3)²


View Answer WL/10 (L – 2D/3)²

The live load to be considered for an inaccessible roof, is______________?


a Nil


b75 kg/m2


c150 kg/cm 2


d200 kg/m2


View Answer 75 kg/m2

In a combined footing for two columns carrying unequal loads, the maximum hogging bending moment occurs at


aLess loaded column


bMore loaded column


cA point of the maximum shear force


dA point of zero shear force



Piles are usually driven by________________?


aDiesel operated hammer


bDrop hammer


c Single acting steam hammer


d All the above


View Answer All the above

If the average bending stress is 6 kg/cm2 for M 150 grade concrete, the length of embedment of a bar of diameter d according to I.S. 456 specifications, is__________________?


a28 d


b38 d


c48 d


d58 d


View Answer 58 d

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