MDE 11 Q7

1 / 8

Which operational practice can help reduce oil carryover in a centrifugal separator?

D) Reducing the frequency of separator maintenance

B) Regularly monitoring and adjusting the separator’s speed

A) Operating the separator at a high temperature

C) Using a higher viscosity oil

2 / 8

Which factor regarding oil condition affects the discharge frequency of a lubricating oil purifier?

C) The oil’s viscosity

D) The oil’s contamination level

B) The oil’s color

A) The oil’s age

3 / 8

Which factor primarily influences the discharge frequency of an engine lubricating oil purifier?

D) The type of oil being used

A) The engine's operating speed

C) The ambient temperature around the purifier

B) The level of contaminants in the oil

4 / 8

Question 5:

Which onboard test can be used to assess the viscosity of lubricating oil in a medium-speed diesel engine?

A) Crackle test

D) Flashpoint test

B) Viscometer test

C) Blotter spot test

5 / 8

Question 2:

What is the main purpose of using a centrifugal separator in a large medium-speed diesel engine's lubricating oil system?

A) To cool the lubricating oil

C) To increase the oil's viscosity

D) To add additives to the oil

B) To remove water and particulate contaminants from the oil

6 / 8

How can seal and joint failures contribute to oil losses in a separator?

A) By increasing the oil temperature

B) By allowing oil to escape through leaks

C) By reducing the separator’s rotational speed

D) By altering the oil's chemical composition

7 / 8

What effect does high operational speed have on oil losses in a centrifugal separator?

A) It decreases the efficiency of oil separation

D) It has no impact on oil losses

B) It increases the likelihood of oil carryover

C) It improves the separation of contaminants

8 / 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

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

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

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