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GATE 2020: Strength of Materials Rapid Quiz 2 (App update required to attempt this test)

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Question 1

A bar is attached in series as shown in the figure. If the total length of the member to decrease 0.35 mm, then the total work done by the force P is ____ Nm.
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Question 2

For a shaft transmitting torque, the equivalent twisting moment is 20 kN-m and equivalent bending moment is 14 kN-m. If the allowable stresses in shear and bending are 50 MPa and 100 MPa respectively, then the minimum diameter of the shaft is ___ mm.

Question 3

The ratio of volumetric strain of a thin cylinder to that of a thin spherical shell having the same internal pressure, same material and same internal diameter and thickness of spherical is twice that of cylindrical is_____ [take poisson’s ratio = 0.4]

Question 4

At a point in 2D stress system σx = 130 N/mm2, σy = τxy= 40 N/mm2. What is the radius of the Mohr circle for stress drawn with a scale of 1 cm = 10 N/mm2

Question 5

A solid round bar 6 cm in diameter and 250 cm long is used as a strut. One end of the strut is fixed while its other end is hinged. The safe compressive load for strut using Euler’s formula, assuming E = 200 GPa and factor of safety = 2 is

Question 6

A torque of 10 KN-m is applied to a thin-walled pipe with a mean diameter equal to 11 cm. the wall thickness of the pipe in order that the shear stresses would not exceed 100 MPa, is
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