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GATE 2020 ME (ME2) – Question 18

Theory of Machines · Displacement, velocity and acceleration analysis of plane mechanisms · 1 mark · Multiple choice

How many qualitatively distinct kinematic inversions are possible for a Grashof chain with four revolute pairs?

  1. 1
  2. 2
  3. 3
  4. 4

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Show answer and explanation

Correct answer: (C) 3

Explanation

Fixing the shortest link produces a double crank. Fixing either adjacent link gives a crank-rocker, and fixing the opposite link gives a double rocker. The two adjacent fixings have the same qualitative type. Thus there are **three types, C**.