SAMSA Second Engineer CoC Practice Questions - South African Maritime Safety Authority STCW Section A-III 2 Second Engineer Officer Certificate Of Competency Exam

What is the primary function of Variable Injection Timing (VIT) in modern marine 2-stroke engine fuel pumps?

To retard fuel injection timing at full load to prevent high exhaust gas temperatures To advance fuel injection timing at partial load to maintain maximum combustion pressure (Pmax) near its rated value To decrease fuel pump plunger stroke at idling speeds To vary the fuel oil viscosity before entering the fuel injector

Correct Answer:

To advance fuel injection timing at partial load to maintain maximum combustion pressure (Pmax) near its rated value

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