ISRO Mechanical Engg. : Strength of Materials Booster Quiz 3

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Question 1

Member CD of the assembly shown is an aluminium bar 0.80 meter long. Cross-sectional dimension of the bar is such that, its width is three times its thickness. For functional design of the bar CD, the allowable axial stress is 70 MPa, and the total elongation is not to exceed 0.70 mm. E value for aluminium is 70 GPa. Assume the connection at C does not reduce the net area of the bar. The thickness of the bar in metre is

• A
• B
• C
• D

Question 2

A metal pipe of 1 m diameter contains a fluid having a pressure of 10kgf/cm². If the permissible tensile stress in the metal is 200 kgf/cm², then the thickness of the metal required for making the pipe would be

• A5 cm
• B10 cm
• C2.5 cm
• D20 cm

Question 3

The given figure shows a cantilever of span ‘L’ subjected to a concentrated load ‘P’ and a moment ‘M’ at the free end. Deflection at the free end is given by

• A
• B
• C
• D

Question 4

A body A of weight 10 kg with its C.G. 25 cm from the axis of rotation is to be balanced by another body B of weight 5 kg. The radius at which the C.G. of weight B should be placed is

• A2 cm
• B12.5 cm
• C50 cm
• DNone of these

Question 5

For the case of a slender column of length L and flexural rigidity El built in at its base and free at the top, the Eulers critical buckling load is

• A
• B
• C
• D

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