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GATE 2020: Strength of Material Quiz 9 (App update required to attempt this test)

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Question 1

The diameter of shaft 1 is thrice the diameter of shaft 2 and both are made of the same material. Assuming both the shafts to rotate at the same speed, the maximum power transmitted by 2 is_____.

Question 2

Torsion bars are in parallel

Question 3

A helical compression spring made of wire of circular cross-section is subjected to a compressive load. The maximum shear stress induced in the cross-section of the wire is 24 MPA. For the same compressive load, if both the wire diameter and the mean coil diameter are doubled, the maximum shear stress (in MPa) induced in the cross-section of the wire is _______

Question 4

A hollow and a solid shaft of same material is subjected to the same torque. The length and outer radius of both the shafts are same and it is given that the inner radius of the hollow shaft is 0.6 times the outer radius. The angle of twist is

Question 5

The ratio of power transmission capacities of a solid and hollow circular shaft when they are rotating at the same rpm. Given that material, weight and length are same for both the shafts and k is the ratio of inner to outer diameter of the hollow shaft.

Question 6

Consider a stepped shaft subjected to a twisting moment applied at B & C as shown in the figure. Assume shear modulus, G = 80 GPa. The angle of twist at D (in degrees) is ______ (corrected up to 3 decimal places)

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