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QUESTION: 1

Slenderness ratio has dimensions of

Solution:

Slenderness ratio

QUESTION: 2

Consider a column of aluminium alloy having modulus of elasticity 70 x 105 N/cm^{2} and a yield strength of 50 x 10^{2} N/cm^{2}. The least value of slenderness ratio will be closer to

Solution:

QUESTION: 3

Two steel struts have the same cross-sectional areas. One is a solid one and the other is a hollow with internal diameter three-fourth of the external diameter. The ratio of the strength of the solid steel strut to that of the hollow one is

Solution:

QUESTION: 4

All of the following statements about kern are correct, except

Solution:

The kern of a rectangular section is diamond shaped.

QUESTION: 5

The ratio of the core of a circular section to the area of circular section when used as a short column is

Solution:

QUESTION: 6

Euler’s formula gives 5 to 10% error in crippling load as compared to experimental results in practice due to

Solution:

QUESTION: 7

The ratio of critical loads a column can carry when it end conditions are best and worst is

Solution:

QUESTION: 8

The column of length 240 cm, area of cross- section 20 cm 2, moment of inertia 1_{XX} = 720 cm^{4} and I_{yy} = 80 cm^{4} is subject to buckling load. The data corresponds to slenderness ratio

Solution:

and

Slenderness ratio is the ratio of length and least radius of gyration

∴

QUESTION: 9

The slenderness of a column is zero when

Solution:

QUESTION: 10

A column of rectangular cross-section (I_{XX} > I_{YY}) is subject to an axial load. What is the axis about which the column will have atendency to buckle?

Solution:

Buckling tendency is always along least radius of gyration.

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