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Theory of Structures

Theory of Structures
The load on a spring per unit deflection, is called

Stiffness
Proof resilience
Proof stress
Proof load

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Theory of Structures
A rolled steel joist is simply supported at its ends and carries a uniformly distributed load which causes a maximum deflection of 10 mm and slope at the ends of 0.002 radian. The length of the joist will be,

16 m
14 M
13 M
15 M

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Theory of Structures
A two hinged parabolic arch of span l and rise h carries a load varying from zero at the left end to ? per unit run at the right end. The horizontal thrust is

ωl²/12h
ωl²/8h
ωl²/4h
ωl²/16h

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Theory of Structures
A lift of weight W is lifted by a rope with an acceleration f. If the area of cross-section of the rope is A, the stress in the rope is

(1 – g/f)/A
[W (2 + f/G)]/A
[W (2 + g/f)]/A
[W (1 + f/ G)]/ A

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Theory of Structures
A compound truss may be formed by connecting two simple rigid frames, by

three parallel bars
Three bars
Three bars intersecting at a point
Two bars

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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:

5.0 mm
4.0 mm
5.5 mm
4.5 mm

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