Exam Question

### (a) Automatic Backlushing Lubricating Oil Filter
#### Concept
An automatic backlushing filter is a full-flow filtration unit installed in the main engine lubricating oil line, typically after the pumps and coolers, and before the engine inlet. Its primary function is to remove solid contaminants from the lubricating oil to protect bearings, journals, and other moving parts from abrasive wear. It operates continuously, and its key feature is the ability to clean itself ('backflush') automatically without interrupting the oil supply to the engine. The cleaning cycle is triggered by an increase in differential pressure across the filter elements, which indicates clogging.
#### Construction