Q. During idling of a petrol engine requires

A
Air only
B
Lean mixture
C
Rich mixture
D
None of these
Solution:
  • The engine requires a rich mixture (more fuel than a stoichiometric mixture) for starting at idling to compensate for the charge dilution due to exhaust gases from the combustion chamber.
  • Exhaust gas dilution prevents efficient combustion by reducing the contact between the fuel and air particles.
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