MDE 11 End of Unit Quiz

MDE 11 End Of Unit Quiz

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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

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

B) Ensuring proper engine warm-up before operation

D) Cleaning the fuel injectors

C) Using higher-viscosity oil

A) Regularly changing the air filter

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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

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

B) It is mixed with fresh oil before being reused

C) It is discarded and replaced with new oil

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What is a common cause of oil losses in a centrifugal separator?

C) Incomplete separation of contaminants

D) Incorrect oil type used

A) Overheating of the separator

B) Excessive oil viscosity

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Why might oil losses occur due to operational temperature issues in a separator?

A) Because oil becomes too dense and clogs the separator

D) Because operational temperatures do not affect the separator’s performance

B) Because high temperatures can cause oil degradation and carryover

C) Because low temperatures increase oil viscosity too much

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How can temperature control contribute to minimizing oil losses in a separator?

B) By increasing the operational temperature to improve separation

A) By maintaining the oil within an optimal temperature range to prevent degradation

C) By cooling the oil to reduce its viscosity significantly

D) By making the oil more acidic to enhance separation

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

B) The type of contaminants does not affect discharge frequency

C) All contaminants cause the same discharge frequency

A) Different types of contaminants require a different discharge frequency

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

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Question 1:

Which of the following methods is commonly used on board to assess the condition of lubricating oil in a large medium-speed diesel engine?

A) Visual inspection of the oil’s color

B) Laboratory analysis of oil samples

C) Onboard testing for water content and acid number

D) Smelling the oil for any burnt odors

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

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

D) The filter causes small droplets of water or other liquids to merge into larger droplets, which are then separated 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 1: What is the primary function of a coalescer type distillate fuel oil filter?

B) To separate water from fuel by causing small water droplets to combine into larger droplets.

D) To absorb and neutralize sulfur compounds in the fuel.

C) To use centrifugal force to remove solid contaminants from the fuel.

A) To chemically treat the fuel to prevent oxidation.

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How can water in engine oil impact engine performance?

B) It can lead to engine knocking and reduced performance

C) It decreases the engine’s noise level

D) It improves engine power output

A) It enhances fuel efficiency

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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?

C) Blotter spot test

D) Flashpoint test

A) Crackle test

B) Viscometer test

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