MDE 11 Q3

• Correct Answer: A) It is returned directly to the engine's lubrication system

Explanation: After the oil has been cleaned in the centrifugal filter, it is returned directly to the engine's lubrication system to continue its role in lubricating, cooling, and cleaning the engine components. The design of the system ensures that the oil is continuously filtered and reused, maintaining the engine's performance and longevity.

• Correct Answer: C) To remove contaminants from the oil by using centrifugal force

Explanation: The primary function of a centrifugal type lubricating oil filter is to remove contaminants such as dirt, metal particles, and other impurities from the lubricating oil. It does this by spinning the oil at high speeds in a rotating bowl or rotor, which generates centrifugal force. This force pushes the denser contaminants to the outer wall of the rotor, separating them from the cleaner oil.

• Correct Answer: B) A rotating bowl or rotor

Explanation: The rotating bowl or rotor is the key component that creates the centrifugal force needed to separate contaminants from the oil. As the rotor spins at high speed, the centrifugal force causes the heavier contaminants to move outward and accumulate on the inner wall of the bowl, while the cleaner oil remains closer to the center and is then recirculated.

• Correct Answer: B) They are collected on the inner wall of the rotating bowl

Explanation: The contaminants are separated from the oil by the centrifugal force generated by the rotating bowl. As the oil spins, the denser contaminants are forced outward and collect on the inner wall of the bowl, where they remain until the filter is cleaned or serviced. The cleaner oil is then returned to the engine.

• Correct Answer: C) Oil is spun at high speed to separate contaminants based on density

Explanation: The centrifugal filter operates by spinning the oil at high speed within the rotor. This high-speed rotation creates a centrifugal force that causes the denser particles (contaminants) to move outward, separating them from the less dense, cleaner oil. This process is entirely mechanical and relies on the principle of density differences.