Question

Which among the following is not a function of the carburetor?

(a) A small reserve of fuel at constant head

(b) To vaporize the fuel to prepare a homogeneous mixture

(c) To supply the correct amount of air-fuel mixture

(d) To delay the ignition timing depending in the exhaust gas

This question was posed to me in a national level competition.

This is a very interesting question from Petrol Engine Fuel Supply System in section Petrol Engine Fuel Supply System of Automotive Engine Design

Answer 1

The correct answer is (d) To delay the ignition timing depending in the exhaust gas

The explanation: The functions of a carburetor is to keep a small reserve of fuel at the constant head, vaporize the fuel to prepare a homogeneous air-fuel mixture,  supply correct amount of the air-fuel mixture at the correct strength and the ECU takes care of the ignition timing depending on the input from the oxygen sensor.