Machine Design GATE 2019, Set-2

  • 1. Endurance limit of a beam subjected to pure bending decreases with

    (A) decrease in the surface roughness and decrease in the size of the beam

    (B) increase in the surface roughness and decrease in the size of the beam

    (C) increase in the surface roughness and increase in the size of the beam

    (D) decrease in the surface roughness and increase in the size of the beam

    Answer

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  • 2. A short shoe external drum brake is shown in the figure. The diameter of the brake drum is 500 mm. The dimensions a = 1000 mm, b = 500 mm and c = 200 mm. The coefficient of friction between the drum and the shoe is 0.35. The force applied on the lever F = 100 N as shown in the figure. The drum is rotating anti-clockwise. The braking torque on the drum is ______ N·m (round off to two decimal places).

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    Answer

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