Class 4 (4th Engineer) MEKM 📅 Jan 2023

Exam Question

(a) Sketch and describe a fuel oil system of a large diesel engine, from settling tanks to main engine fuel injectors. (10)

(b) Also, comment on the importance of

(i) Heating arrangement with temperature control (2)

(ii) Prevention of air lock in the system (2)

(iii) Purification of fuel (2)

Reference Answer

### (a) Fuel Oil System of a Large Diesel Engine
A modern fuel oil system for a large, slow-speed marine diesel engine operating on heavy fuel oil (HFO) is a comprehensive circuit designed to treat, pressurize, heat, and deliver fuel at the correct viscosity, pressure, and time. The system can be divided into a low-pressure supply section and a high-pressure circulating and injection section.
**System Description and Component-wise Flow:**
1. **Storage and Transfer:**

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