Question

What is volumetric efficiency?

(a) A measure of the power of the engine

(b) A measure of the speed of the engine

(c) A measure of pressure rise in the cylinder

(d) A measure of breathing capacity of the engine

This question was posed to me during an interview.

I'd like to ask this question from Performance Parameters and Characteristics in section Automotive Electronics, Engine Performance Parameter & Testing of Automobile Engines of Automobile Engineering

Answer 1

Correct option is (d) A measure of breathing capacity of the engine

Best explanation: Volumetric efficiency is the ratio of the displaced volume of the fluid by the piston to the swept volume. It is the ratio of actual mass of air drawn by the engine to the theoretical mass which should be drawn by the engine.