Class 4 (4th Engineer) MEKG 📅 Jan 2024

Exam Question

With regards to keeping the gas side of boilers in good condition, discuss EACH of the following:

(a) The mechanism of combustion, stating the factors which are important to good combustion (6)

(b) Oil fuel treatments (5)

Reference Answer

### (a) Mechanism of Combustion and Factors for Good Combustion (6 Marks)
#### Mechanism of Combustion
Combustion is an exothermic chemical reaction where the chemical energy stored in the fuel is converted into thermal energy. In a boiler furnace, this involves the rapid oxidation of the fuel's constituent elements, primarily Carbon (C), Hydrogen (H), and Sulphur (S).
The process unfolds in several stages:

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