Inside which of the following is the lower end of the needle placed in an S U carburetor?(a) Main(b) Pilot(c) Idling(d) CompensatingThe question was asked in unit test.I'd like to ask this question from Petrol Engine Fuel Supply System topic in division Petrol Engine Fuel Supply System of Automotive Engine Design

Inside which of the following is the lower end of the needle placed in

1.	Inside which of the following is the lower end of the needle placed in an S U carburetor?(a) Main(b) Pilot(c) Idling(d) CompensatingThe question was asked in unit test.I'd like to ask this question from Petrol Engine Fuel Supply System topic in division Petrol Engine Fuel Supply System of Automotive Engine Design
Answer» Correct choice is (a) Main The best explanation: The piston moves up and down, the needle also moves up and down .the lower END of the needle is inside the main jet. The up and down movement of the tapering needle causes the ANNULAR AREA for FUEL flow to INCREASE or decrease.

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