For calculating the allowable stress of long columns. The empirical formula , is

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Question
For calculating the allowable stress of long columns. The empirical formula , is known as
Options
A. Straight line formula
B. Parabolic formula
C. Perry's formula
D. Rankine's formula.

Correct Answer

Straight line formula

Theory of Structures problems

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4. Pick up the correct statement from the following:
Options
A. In a loaded beam, the moment at which the first yield occurs is called yield moment
B. In a loaded beam, the moment at which the entire section of the beam becomes fully plastic, is called plastic moment
C. In a fully plastic stage of the beam, the neutral axis divides the section in two sections of equal area
D. The ratio of plastic moment to the yield moment, is called shape factor
E. All the above.

5. If ?H and ?V are the algebraic sums of the forces resolved horizontally and vertically respectively, and ?M is the algebraic sum of the moments of forces about any point, for the equilibrium of the body acted upon
Options
A. ?H = 0
B. ?V = 0
C. ?M = 0
D. all the above.

9. A steel rod 1 metre long having square cross section is pulled under a tensile load of 8 tonnes. The extension in the rod was 1 mm only. If E_steel = 2 x 10⁶ kg/cm², the side of the rod, is
Options
A. 1 cm
B. 1.5 cm
C. 2 cm
D. 2.5 cm

10. Pick up the correct statement from the following:
Options
A. Hoop strain of the walls of a cylinder due to liquid is
B. Longitudinal strain in the walls of a cylinder due to liquid is
C. Volumetric change in the cylinderdue to liquid is
D. All the above.

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