MDE 11 Q7

Correct Answer: B) Because high temperatures can cause oil degradation and carryover

Explanation: High temperatures can lead to oil degradation, which affects the separator’s ability to effectively separate contaminants, resulting in oil carryover and loss.

Correct Answer: D) The oil’s contamination level

Explanation: The contamination level of the oil directly affects how often the purifier needs to discharge. High contamination levels will require more frequent discharges to ensure the oil remains clean.

Correct Answer: B) A higher flow rate results in higher discharge frequency

Explanation: A higher flow rate means more oil is processed through the purifier in a given time, which can increase the rate at which contaminants build up and thus require more frequent discharges.

Correct Answer: C) A damaged water pump

Explanation: A damaged water pump can lead to coolant leakage, which may then mix with the engine oil and cause water contamination.

Correct Answer: B) It increases the likelihood of oil carryover

Explanation: While high operational speeds generally improve separation efficiency, if the separator is not properly maintained or adjusted, high speeds can lead to increased oil carryover and losses.

Correct Answer: C) It occurs when the engine is not run at high enough temperatures

Explanation: Condensation forms when the engine does not reach sufficient operating temperature, allowing moisture to condense in the oil and cause contamination.

Correct Answer: B) Viscometer test
Explanation: A viscometer test is used to measure the oil's viscosity, which is crucial for ensuring proper lubrication and engine performance.

These questions cover various aspects of assessing the condition of lubricating oil in a large medium-speed diesel engine on board a vessel.

Correct Answer: B) It can lead to engine knocking and reduced performance

Explanation: Water contamination can cause incomplete combustion and engine knocking, leading to reduced performance and efficiency.