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Theory of Structures

Theory of Structures
The greatest load which a spring can carry without getting permanently distorted, is called

Proof resilience
Proof load
Stiffness
Proof stress

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Theory of Structures
The maximum deflection of a simply supported beam of span L, carrying an isolated load at the centre of the span; flexural rigidity being EI, is

WL3/8EL
WL3/24EL
WL3/3EL
WL3/48EL

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Theory of Structures
Maximum shear stress theory for the failure of a material at the elastic limit, is known

Guest's or Trecas' theory
Rankine's theory
Haig's theory
St. Venant's theory

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Theory of Structures
If a three hinged parabolic arch, (span l, rise h) is carrying a uniformly distributed load w/unit length over the entire span,

Horizontal thrust is wl2/8h
B.M. will be zero throughout
All of these
S.F. will be zero throughout

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Theory of Structures
section modulus of a square section of side B and that of a circular section of the ratio of the diameter D, is

/16
2 /15
3 /16
3 /8

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Theory of Structures
A load of 1960 N is raised at the end of a steel wire. The minimum diameter of the wire so that stress in the wire does not exceed 100 N/mm² is:

4.5 mm
4.0 mm
5.0 mm
5.5 mm

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