Civil Engineering MCQs

Page No. 206

The moment of inertia of a triangular section (height h, base b) about its base, is_______________?


abh²/12


b b²h/12


c bh3/12


d b3h/12


View Answer bh3/12

A close coil helical spring of mean diameter D consists of n coils of diameter d. If it carries an axial load W, the energy stored in the spring, is______________?


a4WD²n/d4N


b4W²Dn/d4N


c 4W²D3n/d4N


d4W²D3n²/d4N


View Answer 4W²D3n/d4N

The load on a spring per unit deflection, is called______________?


aStiffness


bProof resilience


cProof stress


d Proof load


View Answer Stiffness

The forces acting normally on the cross section of a bar shown in the given figure introduce_____________?


aCompressive stress


bTensile stress


cShear stress


d None of these


View Answer Tensile stress

A body is said to be in equilibrium if___________________?


a It moves horizontally


b It moves vertically


cIt rotates about its C.G.


dNone of these


View Answer None of these

Gradually applied static loads do not change with time their_______________?


aMagnitude


b Direction


c Point of application


d All the above


View Answer All the above

If E, N, K and 1/m are modulus of elasticity, modulus of rigidity. Bulk modulus and Poisson ratio of the material, the following relationship holds good_______________?


aE = 3K (1 – 2/m)


bE = 2N (1 + 1/m)


c (3/2)K (1 – 2/m) = N (1 + 1/m)


dAll the above


View Answer All the above

If Ix and Iy are the moments of inertia of a section about X and Y axes, the polar moment of inertia of the section, is_________________?


a(IX + IY)/2


b (IX – IY)/2


c IX + IY


d(I /I )


View Answer IX + IY

In case of a simply supported I-section beam of span L and loaded with a central load W, the length of elasto-plastic zone of the plastic hinge, is_________________?


aL/2


b L/3


c L/4


d L/5


View Answer L/5

A simply supported beam A carries a point load at its mid span. Another identical beam B carries the same load but uniformly distributed over the entire span. The ratio of the maximum deflections of the beams A and B, will be________________?


a2/3


b3/2


c5/8


d8/5


View Answer 8/5

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