Class 4 (4th Engineer) SSEP 📅 May 2024

Exam Question

State the causes of scavenge fire in a two-stroke engine and explain how the possibility of such an occurrence can be reduced. If a scavenge fire does occur what action should be taken? Discuss the use of CO2 and dry powder for extinguishing such a fire and describe a fixed installation for applying one of these chemicals (20)

Reference Answer

A scavenge fire is an uncontrolled combustion of accumulated flammable materials within the scavenge air space of a two-stroke marine diesel engine. The occurrence requires the presence of all three elements of the fire triangle: Fuel, Heat, and Oxygen.
### **1. Causes of Scavenge Fire**
The causes can be categorized based on the fire triangle:
**A. Accumulation of Fuel:**

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