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Theory of Structures

Theory of Structures
Inertia of a rectangular section of width and depth about an axis passing the moment of through C.G. and parallel to its width is

B²D/6
BD³/12
BD³/6
BD²/6

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Theory of Structures
In case of principal axes of a section

Product of moment of inertia is zero
Sum of moment of inertia is zero
Difference of moment inertia is zero
None of these

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Theory of Structures
At yield point of a test piece, the material

Behaves in an elastic manner
Obeys Hooke’s law
Undergoes plastic deformation
Regains its original shape on removal of the load

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Theory of Structures
A bar L metre long and having its area of cross-section A, is subjected to a gradually applied tensile load W. The strain energy stored in the bar is

W²L/2AE
WL/2AE
W²L/AE
WL/AE

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Theory of Structures
A shaft subjected to a bending moment M and a torque T, experiences

Maximum bending stress = 32M/πd³
Both A and B
Maximum shear stress = 16 T/πd³
Neither A nor B

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Theory of Structures
A simply supported beam carries varying load from zero at one end and w at the other end. If the length of the beam is a, the maximum bending moment will be

wa²/27
w²a
wa/27
wa²

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