When the two elements of a pair are not connected mechanically but are kept in contact by the action of external forces, the pair is said to be a force-closed pair. The cam and follower is an example of force closed pair, as it is kept in contact by the forces exerted by spring and gravity.
152) When the elements of a pair are kept in contact by the action of external forces, the pair is said to be a
Answer is:
force-closed pair
Explanation:
Related Theory of Machines MCQ with Answers
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equal to
Answer is:
each of the four pairs is a turning pair
Explanation:
Four bar chain or Quadric cycle chain consists of four links, each of them forms a turning pair. The inversions of four bar chain are as follows.
* Beam Engine (Crank and lever mechanism)
* Coupling rod of a locomotive (Double crank mechanism)
* Watt's indicator mechanism (Double lever mechanism)
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