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Which risk increases when exceeding the scavenging limit in two-stroke engines?

A)Increased unburned fuel emissions
B)Reduced volumetric efficiency overall
C)Elevated cylinder head temperature
D)Decreased engine scavenging efficiency

💡 Explanation

Exceeding the scavenging limit causes increased unburned fuel emissions because short-circuiting occurs, where fresh air-fuel mixture exits directly through the exhaust port via scavenging; therefore, excess hydrocarbons are apparent, rather than complete combustion within the power stroke.

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