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To prevent overheating of exhaust valve and the area near it, the air-fuel mixture must be ___________

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To prevent overheating of exhaust valve and the area near it, the air-fuel mixture must be ___________

(a) lean

(b) rich

(c) chemically balanced

(d) none of the mentioned

This question was posed to me during an online exam.

The above asked question is from Automotive Engines in division Carburetion of IC Engine

1 Answer

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Best answer
Correct choice is (b) rich

For explanation I would say: None.

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