In a four bar chain or quadric cycle chain

A each of the four pairs is a turning pair
B one is a turning pair and three are sliding pairs
C three are turning pairs and one is sliding pair
D each of the four pairs is a sliding pair.

Correct Answer: each of the four pairs is a turning pair

A very important consideration in designing a mechanism is to ensure that the input crank makes a complete revolution relative to the other links. The mechanism in which no link makes a complete revolution will not be useful. In a four bar chain, one of the links, in particular the shortest link, will make a complete revolution relative to the other three links, if it satisfies the Grashof ’s law. Such a link is known as crank or driver.
Bissoy MCQ
#Machine Kinematics #Simple Mechanisms

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