13) The pair is known as a higher pair, when the relative motion between the elements of a pair is

Answer is:

Party turning and partly sliding

Theory of Machines MCQ with Answers

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14) which of the following is a higher pair ?

Answer is:

Belt and pulley

15) 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:

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.