MDE 11 End of Unit Quiz

MDE 11 End Of Unit Quiz

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

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

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

C) It makes the oil more resistant to high temperatures

A) It enhances the oil’s lubricating properties

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Question: Which of the following best explains the principle of operation of a coalescer lubricating oil filter?

D) The filter causes small droplets of water or other liquids to merge into larger droplets, which are then separated from the oil.

A) The filter uses a magnetic field to attract and remove ferrous particles from the oil.

C) The filter uses a chemical reaction to neutralize acids in the oil.

B) The filter uses centrifugal force to separate contaminants from the oil.

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Question 3:

How is the condition of lubricating oil in a large medium-speed diesel engine typically monitored?

A) By visually inspecting the oil color

D) By observing the oil pressure gauge readings

C) By smelling the oil for unusual odors

B) By regularly testing the oil's viscosity, water content, and acid number

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Which component failure is likely to introduce water into the engine lubricating oil?

A) A malfunctioning turbocharger

D) A failing oil pump

B) A cracked oil pan

C) A damaged water pump

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Question 5:

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

B) Viscometer test

D) Flashpoint test

A) Crackle test

C) Blotter spot test

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What is one of the primary effects of water contamination in engine oil?

C) Formation of oil sludge

D) Reduced engine temperature

A) Improved lubrication properties

B) Increased oil viscosity

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

A) The engine's operating speed

C) The ambient temperature around the purifier

D) The type of oil being used

B) The level of contaminants in the oil

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How does the type of contaminants in the oil influence the discharge frequency of the purifier?

D) The type of contaminants only affects the purifier's operational speed

A) Different types of contaminants require a different discharge frequency

C) All contaminants cause the same discharge frequency

B) The type of contaminants does not affect discharge frequency

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How can ensuring proper sealing and joint integrity help in minimizing oil losses in a separator?

B) By lowering the temperature of the oil

A) By preventing oil leakage through seal and joint failures

C) By increasing the pressure in the separator

D) By altering the oil’s chemical properties

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Which of the following is a common cause of water contamination in diesel engine lubricating oil?

D) Excessive oil temperature

C) A leaking cylinder head gasket

B) A faulty fuel injector

A) Overuse of the engine’s air filter

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What maintenance practice can help prevent water contamination in the engine lubricating oil?

D) Cleaning the fuel injectors

C) Using higher-viscosity oil

A) Regularly changing the air filter

B) Ensuring proper engine warm-up before operation

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Question 3: What happens to the larger water droplets formed in a coalescer type filter?

B) They are collected in a water separator and drained off.

A) They are absorbed by a desiccant material.

D) They are filtered out by a secondary filter.

C) They are mixed back into the fuel to improve lubrication.

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