Exam Question
(a) Explain the working principle of a fuel oil purifier. (8)
(b) Explain briefly the significance of the friction clutch mechanism. (4)
(c) List the alarms and trips associated with a purifier. (4)
Class 4 (4th Engineer)
MEKG
📅 Jun 2024
Reference Answer
### (a) Explanation of the Working Principle of a Fuel Oil Purifier
A fuel oil purifier, specifically a centrifugal separator, operates on the principle of density difference to remove water and solid impurities from fuel oil (e.g., HFO, MGO). This process is crucial for protecting engine components from wear and corrosion and ensuring efficient combustion.
#### 1. Fundamental Principle: Centrifugal Separation
* **Density Difference**: Fuel oil, water, and solid particles have different specific gravities. Fuel oil is the lightest, solids are the heaviest, and water is intermediate but denser than oil. A purifier exploits this density difference.
A fuel oil purifier, specifically a centrifugal separator, operates on the principle of density difference to remove water and solid impurities from fuel oil (e.g., HFO, MGO). This process is crucial for protecting engine components from wear and corrosion and ensuring efficient combustion.
#### 1. Fundamental Principle: Centrifugal Separation
* **Density Difference**: Fuel oil, water, and solid particles have different specific gravities. Fuel oil is the lightest, solids are the heaviest, and water is intermediate but denser than oil. A purifier exploits this density difference.
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