MDE 11 Q5

Correct Answer: D) It can reduce oil flow through the engine

Explanation: Water contamination can cause the oil to become emulsified, reducing its ability to flow properly through the engine.

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: C) Formation of oil sludge

Explanation: Water in engine oil can cause the formation of sludge, which can impede the flow of oil and affect lubrication.

Correct Answer: B) The level of contaminants in the oil

Explanation: The discharge frequency of the oil purifier is largely determined by the amount of contaminants in the oil. Higher contamination levels lead to more frequent discharges to maintain oil purity.

• Correct Answer: B) It causes the oil to lose its ability to lubricate effectively

  Explanation: Water contamination dilutes the oil and disrupts its lubricating properties, leading to inadequate protection for engine components.

Correct Answer: C) A leaking cylinder head gasket

Explanation: A leaking cylinder head gasket can allow coolant or water to mix with the engine oil, leading to contamination.

Correct Answer: B) Ensuring proper engine warm-up before operation

Explanation: Properly warming up the engine ensures that it reaches operating temperature, reducing the risk of condensation and water contamination in the oil.

Correct Answer: B) It can cause the oil to become foamy

Explanation: Water contamination in the oil can cause it to become emulsified and foamy, reducing its lubricating properties.

Correct Answer: A) Different types of contaminants require a different discharge frequency

Explanation: Different contaminants may have different effects on the purifier's efficiency and capacity, influencing how often discharges are needed. For example, heavier solids might require more frequent discharges than lighter contaminants.

Correct Answer: C) A leaking cylinder head gasket

Explanation: A leaking cylinder head gasket can allow coolant or water to mix with the engine oil, leading to contamination.

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) 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.

Correct Answer: B) Enhanced corrosion of engine parts

Explanation: Water in engine oil can lead to increased corrosion of engine parts due to the formation of acids and rust, damaging components over time.

Correct Answer: A) A larger capacity purifier will have a lower discharge frequency

Explanation: A purifier with a larger capacity can handle more oil before needing to discharge contaminants, thus reducing the frequency of discharges.

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.