Class 1 (Chief Engineer) Engineering Management 📅 Nov 2021

Exam Question

The vessel in which you are the Chief Engineer is about to be laid up for 3months for commercial reasons. All equipment and machinery on board require to be preserved during the lay-up period for re-commissioning when required. Describe the actions you will take as Chief Engineer to prepare the Main propulsion diesel engine for preserving during the lay-up period.

Reference Answer

As Chief Engineer, a systematic and thorough approach is required to preserve the main propulsion diesel engine for a 3-month lay-up period. The objective is to prevent corrosion, degradation of components, and ensure a smooth re-commissioning process. The procedure is based on a 'hot lay-up' protocol, suitable for durations of up to 3 months.
### 1. Preparatory Actions (Prior to Engine Shutdown)
These actions are critical to clean the system of contaminants that could cause damage during a static period.
* **Fuel System Changeover**: The engine must be changed over from Heavy Fuel Oil (HFO) to Marine Gas Oil (MGO). This process must be followed as per the manufacturer's recommended temperature gradients to avoid thermal shock to fuel system components.

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