MCA SV Marine Diesel Engineering Practice Questions - MCA Small Vessel Engineering - Marine Diesel Engineering (SQA Written Examination 060-01) Exam

Valve overlap on a four-stroke diesel is the period when:

Both inlet and exhaust valves are closed near bottom dead centre Both inlet and exhaust valves are open around top dead centre between exhaust and induction Only the exhaust valve is open during the power stroke The fuel injector and safety valve open together

Correct Answer:

Both inlet and exhaust valves are open around top dead centre between exhaust and induction

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