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For a spark ignition engine, the equivalence ratio (φ) of mixture entering the combustion chamber has values
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- φ < 1 for idling and φ > 1 for peak power conditions
- φ > 1 for both idling and peak power conditions
- φ > 1 for idling and φ < 1 for peak power conditions
- φ < 1 for both idling and peak power conditions
Correct Option: B
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