Question

When the elements of a pair are kept in contact by the action of external forces, the pair is said to be a

(a) lower pair

(b) higher pair

(c) self-closed pair

(d) force-closed pair

This question was posed to me in an online interview.

Asked question is from Classification of Kinematic Pairs in division Simple Mechanisms of Machine Kinematics

Answer 1

The correct choice is (d) force-closed pair

The best I can explain: When the two elements of pair are not connected mechanically but are kept in contact by the action of external forces, the pair is said to be a forced-closed pair.