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In practice what is the fuel level in the float chamber that is maintained in millimeter below the nozzle?

(a) 10

(b) 5

(c) 20

(d) 15

This question was addressed to me in semester exam.

My doubt stems from Petrol Engine Fuel Supply System topic in division Petrol Engine Fuel Supply System of Automotive Engine Design

1 Answer

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The correct option is (b) 5

To explain: The fuel level in the float chamber is maintained about 5mm below the nozzle outlet. A small vent in the float chamber keeps the pressure inside atmospheric and in modern practice is preferred to vent the float chamber to the air intake of the carburetor.

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