MDE 11 Q7

1 / 8

How can condensation in the engine contribute to water contamination of the lubricating oil?

A) It forms due to oil breakdown

B) It results from improper combustion

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

D) It is caused by excessive fuel combustion

2 / 8

How can water ingress through the engine’s cooling system affect the lubricating oil?

B) It can cause the oil to become foamy

A) It can increase oil viscosity

C) It can improve oil lubrication

D) It can make the oil more combustible

3 / 8

How can water in engine oil impact engine performance?

D) It improves engine power output

B) It can lead to engine knocking and reduced performance

A) It enhances fuel efficiency

C) It decreases the engine’s noise level

4 / 8

How does water in engine oil affect the oil's lubricating properties?

D) It improves the oil’s ability to clean engine parts

A) It enhances the oil’s lubricating properties

B) It causes the oil to lose its ability to lubricate effectively

C) It makes the oil more resistant to high temperatures

5 / 8

Question 4:

Which of the following actions can prevent the deterioration of lubricating oil in a large medium-speed diesel engine?

B) Regularly replacing the oil filters

A) Using a low-quality oil

C) Allowing the engine to run with contaminated oil

D) Reducing the engine’s load

6 / 8

Why is it important to use the correct type of oil for a specific separator?

C) To reduce the oil’s flash point

B) To match the oil viscosity with the separator’s operational requirements

A) To ensure the oil does not degrade the separator material

D) To make the oil more prone to contamination

7 / 8

Which of the following factors influence the efficiency of a centrifugal separator in a diesel engine's lubrication system?

D) The amount of water in the oil, the presence of fuel additives, the engine's cooling system, and the oil's pH level

C) The age of the oil, the type of fuel used, ambient air temperature, and the size of the engine

B) The type of oil used, the color of the oil, the engine's RPM, and the size of the fuel injectors

A) Rotor speed, oil temperature, viscosity of the oil, and the amount of contaminants present

8 / 8

Question 5:

What happens to the clean oil after it passes through a centrifugal lubricating oil filter?

D) It is sent to a secondary filtration system

B) It is mixed with fresh oil before being reused

A) It is returned directly to the engine's lubrication system

C) It is discarded and replaced with new oil

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