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In a two-stroke Petrol engine, fuel loss is maximum after:

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  1. Opening the exhaust port
  2. Closing the exhaust port
  3. Opening the inlet port
  4. Closing the inlet port

Answer (Detailed Solution Below)

Option 1 : Opening the exhaust port
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Detailed Solution

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Scavenging: The process in which fresh mixture is charged into the cylinder and pushes the exhaust through the exhaust ports. During this process, a part of the fresh mixture is also lost as it escapes through the exhaust port. This leads to increased consumption and decreased fuel efficiency.
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