GATE ME Machine Design PYQs & Answers — Page 5

Questions 41–43 of 43. Imported answers require independent review unless marked reviewed.

A single-plate clutch has a friction disc with inner and outer radii of 20 mm and 40 mm, respectively. The friction lining in the disc is made in such a way that the coefficient of friction

varies radially as

, where

is in m. The clutch needs to transmit a friction torque of 18.85 kN·mm. As per uniform pressure theory, the pressure (in MPa) on the disc is ____________.

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The principal stresses at a point in a critical section of a machine component are

MPa,

MPa and

MPa. For the material of the component, the tensile yield strength is

MPa. According to the maximum shear stress theory, the factor of safety is

Your answerChoose one option.

1.67

2.00

3.60

4.00

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A machine element has an ultimate strength (

) of 600 N/mm², and endurance limit (

) of 250 N/mm². The fatigue curve for the element on a log-log plot is shown below. If the element is to be designed for a finite life of 1000 cycles, the maximum amplitude of a completely reversed operating stress is __________ N/mm².

Diagram for Mechanical Engineering question 43

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GATE ME Machine Design PYQs

Question 36

Question 37

Question 43