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Theory of Structures

Theory of Structures
The ratio of lateral strain to axial strain of a homogeneous material, is known

Hooke’s ratio
Yield ratio
Plastic ratio
Poisson’s ratio

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Theory of Structures
The horizontal deflection of a parabolic curved beam of span 10 m and rise 3 m when loaded with a uniformly distributed load l t per horizontal length is (where Ic is the M.I. at the crown, which varies as the slope of the arch).

50/EIc
200/EIc
150/EIc
100/EIc

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Theory of Structures
The maximum deflection due to a load W at the free end of a cantilever of length L and having flexural rigidity EI, is

WL²/2EI
WL3/3EI
WL²/3EI
WL3/2EI

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Theory of Structures
The strain energy stored in a spring when subjected to greatest load without being permanently distorted, is called

Proof resilience
Proof stress
Proof load
Stiffness

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Theory of Structures
The point of contraflexure is the point where

M. is maximum
S.F. is zero
M. is minimum
M. changes sign

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Theory of Structures
A steel bar 5 m × 50 mm is loaded with 250,000 N. If the modulus of elasticity of the material is 0.2 MN/mm² and Poisson’s ratio is 0.25, the change in the volume of the bar is:

3.125 cm³
2.125 cm³
1.125 cm³
4.125 cm²

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