Question

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

(a) turning only

(b) sliding only

(c) rolling only

(d) partly turning and partly sliding

I have been asked this question in unit test.

Query is from Classification of Kinematic Pairs in portion Simple Mechanisms of Machine Kinematics

Answer 1

The correct option is (d) partly turning and partly sliding

The explanation: When the two elements of a pair have a line or point contact when relative motion takes place and the motion between the two elements is partly turning and partly sliding, then the pair is known as higher pair.