Question

What is the requirement of the air box in the airbox method of measuring airflow?

(a) To dump out the pulsation

(b) To provide the constant velocity of flow

(c) To have a constant flow

(d) To have a constant temperature

I have been asked this question during an interview for a job.

The query is from Measurements and Testing in section Automotive Electronics, Engine Performance Parameter & Testing of Automobile Engines of Automobile Engineering

Answer 1

Correct answer is (a) To dump out the pulsation

To explain I would say: The airbox is used to dump out the pulsation while measuring the airflow. In IC engines, the satisfactory measurement of the air consumption is difficult because the flow is pulsating due to the cyclic nature of the engine and because the air is a compressible fluid.