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"Strength of Materials _Quiz 1

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Question 1

The strain energy of a beam is ______.

Question 2

A torsion member is fabricated from two concentric thin tubes. At the ends, the tubes are welded to rigid discs so that both the tubes are twisted as a unit. The radius of the outer tube is 2r and that of the inner tube is r. If the shear stresses developed in the outer tube is 'τ', then the shear stress in the inner tube will be ______.

Question 3

What is the maximum possible value of Poisson’s ratio for a non-dilatant material?

Question 4

The material of the rubber balloon has a Poisson’s ratio of 0.5. If uniform pressure is applied to blow the balloon, the volumetric strain of the material will be:’

Question 5

Two bars of different materials and same size are subjected to the same tensile force. If the bars have elongation in the ratio of 3:7, then the ratio of modulus of elasticity of the two materials will be

Question 6

According to Euler’s column theory, the crippling load of a column is given by . In this equation, the value of C for a column one end fixed and other end free, is

Question 7

A circular surface area 200 cm2 is inclined to the x and y axes such that the unit vector normal to the surface is given by n = 0.4i + 0.3j. If a force of 2000 kg acts on the x-axis, then the normal stress on the surface will be:

Question 8

At a certain stage under elastic loading, the elongation observed was 0.03 mm, the gauge length was 150 mm and the modulus of elasticity was 2 x 105 N/mm2. What is the stress at the location?

Question 9

A thin spherical shell of wall thickness 4 mm and internal diameter 400 mm is subjected to an internal pressure of 5 N/mm2. The longitudinal stress exerted by the thin shell is

Question 10

Among the following identify the dimensionless quantity.
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