Exam Question
Describe the nature and the possible effects on machinery operation of deposits, which may adhere to the internal surfaces of exhaust gas turbo-blowers and explain how these deposits are removed (16)
Class 4 (4th Engineer)
MEP
📅 Aug 2023
Reference Answer
### **1. Nature and Formation of Deposits**
Deposits found within exhaust gas turbo-blowers are a direct consequence of the combustion process, particularly when operating on residual fuels like Heavy Fuel Oil (HFO). The nature of these deposits is complex and is influenced by several factors.
**a) Composition:**
* **Carbonaceous Matter:** Primarily soot and unburnt hydrocarbons resulting from incomplete combustion. This is common during low-load operation, manoeuvring, or if fuel atomization is poor.
Deposits found within exhaust gas turbo-blowers are a direct consequence of the combustion process, particularly when operating on residual fuels like Heavy Fuel Oil (HFO). The nature of these deposits is complex and is influenced by several factors.
**a) Composition:**
* **Carbonaceous Matter:** Primarily soot and unburnt hydrocarbons resulting from incomplete combustion. This is common during low-load operation, manoeuvring, or if fuel atomization is poor.
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