Class 2 (2nd Engineer) MEP 📅 Mar 2018

Exam Question

Severe engine vibration observed while the main engine operates within a certain speed range.

(a) What are the possible causes of such vibration?

(b) What are the consequences of operating the engine under such vibratory conditions?

Reference Answer

(a) Severe engine vibration within a specific speed range can be caused by either internal or external factors.
Internal Troubles:
Improper fuel injection timing, misfire, or power imbalance between cylinders can cause uneven combustion forces leading to vibrations.
Problems with the fuel pump, fuel injectors, or fuel lines can disrupt fuel delivery, resulting in inconsistent combustion and vibration.

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