Correct answer
To separate it from solid impurities.
The filter retains solid contaminants in the oil, including wear particles and residues, to reduce wear of lubricated components. Its purpose is neither to reduce oil viscosity nor to increase adhesion. Follow the manufacturer’s maintenance intervals and specifications. In systems with a bypass valve, oil may temporarily flow without filtration to maintain supply; therefore, do not assume that all oil always passes through the filter media.
Practice more D licence questions
A self-check with exam-style questions on Mechanics and maintenance. Free, no signup.
All options
To reduce its viscosity.
To separate it from solid impurities.
To increase its adhesion.
Editorial status: editorially approved. This status does not certify legal review. Report a correction
Keep studying
Related questions
- What type of brake is shown in the photograph?
- Should you check the coolant level in your bus's engine cooling system?
- Which instrument indicates the oil-pressure value in the lubrication circuit?
- You drive a bus and intend to overtake a motorcycle outside a built-up area. Under the current general rule, what lateral clearance must you leave?
- In a conventional lead-acid battery with vented caps, what are the ventilation holes in those caps for?
- In a bus, preventive maintenance of the braking system is essential because: