In a coupling rod of a locomotive, each of the four pairs is a ________ pair.

Solution(By Examveda Team)

A coupling rod in a locomotive is a crucial component that connects the driving wheels of the locomotive. It plays a vital role in transmitting motion from the piston to the wheels. The question is asking about the type of pair formed by each connection between the coupling rod and the driving wheel.

A coupling rod forms a rolling pair with the driving wheel. In a rolling pair, the relative motion between the components involves pure rolling, where one component rolls over the surface of the other without any sliding or slipping. This is an essential characteristic for efficient power transmission and reduced wear and tear in locomotives.

While the locomotive is in operation, the coupling rod experiences complex motion due to the varying forces and angles involved. However, the primary mode of relative motion between the coupling rod and the driving wheel is rolling, which ensures smoother operation and improved efficiency of the locomotive's power transmission system.