MDE 10 Q6

Correct Answer: C) It ensures adequate lubrication of engine components.

Explanation: Maintaining proper oil levels is critical for ensuring that all engine components receive adequate lubrication, reducing wear and tear and keeping the oil in a satisfactory condition.

Correct Answer: C) Presence of water in the oil

Explanation: Microbial contamination often occurs when there is water present in the lubricating oil, as microbes thrive in the water-oil interface. This can lead to the formation of sludge and acids that degrade the oil and damage the engine.

Correct Answer: C) Maintaining proper oil temperature

Explanation: Maintaining the proper oil temperature is crucial for ensuring that the lubricating oil remains in good condition. Proper temperature helps in reducing oxidation and ensures the oil's viscosity remains within the optimal range for effective lubrication.

Correct Answer: A) Prolonged idling of the engine

Explanation: Prolonged idling can lead to incomplete combustion, allowing unburned fuel to enter the crankcase and mix with the lubricating oil, leading to fuel dilution.

Correct Answer: B) Metallic particles

Explanation: Metallic particles can enter the lubricating oil as a result of wear and tear of engine components such as bearings, gears, and other moving parts. These particles can cause abrasion and increase engine wear.

Correct Answer: B) Condensation of water vapor

Explanation: Water contamination can occur due to condensation of water vapor inside the engine, especially in cooler environments. This can mix with the lubricating oil and degrade its performance.

Correct Answer: B) Regular oil analysis and monitoring

Explanation: Regular oil analysis and monitoring are crucial for detecting contamination early. This allows for timely intervention to prevent engine damage and ensures that the oil remains in a satisfactory condition.

Correct Answer: B) Keeping the oil free from moisture

Explanation: Keeping the oil free from moisture is essential in preventing oxidation. Moisture can accelerate the oxidation process, leading to the formation of acids and sludge that degrade the oil's quality.

Correct Answer: B) Ensuring proper filtration and regular filter changes

Explanation: Proper filtration and regular filter changes help to remove contaminants that can lead to sludge and deposits in the oil, keeping the oil clean and in good condition.