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
📅 Apr 2025
Reference Answer
### (a) Working Principle of a Fuel Oil Purifier (8 Marks)
A fuel oil purifier, or centrifugal separator, is a device used to remove water and solid impurities from fuel oil. Its operation is based on the principle of high-speed centrifugal separation, which magnifies the effect of gravity by several thousand times to separate substances with different densities.
**1. Fundamental Principle: Separation by Density Difference**
The separation of immiscible liquids and solids is possible due to their density differences. In a static settling tank, the separation occurs under the influence of gravity. The separating force ($$F_s$$) in this scenario can be expressed as:
A fuel oil purifier, or centrifugal separator, is a device used to remove water and solid impurities from fuel oil. Its operation is based on the principle of high-speed centrifugal separation, which magnifies the effect of gravity by several thousand times to separate substances with different densities.
**1. Fundamental Principle: Separation by Density Difference**
The separation of immiscible liquids and solids is possible due to their density differences. In a static settling tank, the separation occurs under the influence of gravity. The separating force ($$F_s$$) in this scenario can be expressed as:
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