Question

Which of the following is an example of sliding pair?

(a) Piston and cylinder of a reciprocating steam engine

(b) Shaft with collars at both ends fitted into a circular hole

(c) Lead screw of a lathe with nut

(d) Ball and a socket joint

This question was posed to me during an interview.

Enquiry is from Types of Links in section Simple Mechanisms of Machine Kinematics

Answer 1

Right option is (a) Piston and cylinder of a reciprocating steam engine

Explanation: When the nature of contact between the element of a pair is such that it can only slide relative to the other, the pair is known as a sliding pair and can be found in piston and cylinder of a reciprocating steam engine.