During which of the following operating conditions of an automobile, carbon monoxide content in the exhaust gas is maximum ?
Correct answer: B. Idle running
- A. Acceleration
- B. Idle running
- C. Cruising
- D. Deceleration
Explanation
Carbon monoxide is formed by incomplete combustion, which is especially severe during idling because the engine operates with a relatively rich mixture and poor combustion conditions. Proper cruising generally gives lower CO emissions.
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