Question

Which of the following is provided in the float chamber to keep the pressure inside atmospheric?

(a) Float

(b) Fuel jet

(c) Small vent

(d) Throttle valve

The question was asked in an interview for job.

Origin of the question is Petrol Engine Fuel Supply System in chapter Petrol Engine Fuel Supply System of Automotive Engine Design

Answer 1

Correct choice is (c) Small vent

For explanation I would say: A small vent in the float chamber keeps the pressure inside the atmospheric. In modern practice, it is preferred to vent the float chamber to the air intake of the carburetor. In modern practice, it is preferred to vent the float chamber to the air intake of the carburetor.