During idling, a petrol engine requires _________ mixture.
A. Lean
B. Rich
C. Chemically correct
D. None of these
Answer: Option B
Solution(By Examveda Team)
During idling, a petrol engine requires rich mixture.This Question Belongs to Mechanical Engineering >> Internal Combustion Engines (I.C. Engines)
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the richer fuel mixture is used (F/A) is used in the idling range due to exhaust gas dilution of fresh charge.
Idling means engine is not connected to gear box. Less chemical mixture is required
idling means no load condition in vehicle
during idling 10 :1 air fuel ratio chemically correct stiochiometric mixture 14.7:1