MDE 11 Q6

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Question 1:

Which of the following practices is essential to maintain the lubricating oil in optimum condition in a large medium-speed diesel engine?

B) Periodically cleaning the oil using a centrifugal separator

C) Allowing the oil to settle in the sump for long periods

D) Increasing the engine's operating temperature

A) Regularly changing the oil with fresh oil

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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?

B) Laboratory analysis of oil samples

C) Onboard testing for water content and acid number

A) Visual inspection of the oil’s color

D) Smelling the oil for any burnt odors

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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

B) Viscometer test

D) Flashpoint test

A) Crackle test

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Question 2:

What is the purpose of conducting a blotter spot test on lubricating oil on board?

D) To measure the oil's acid number

C) To detect the presence of contaminants such as soot and water

A) To determine the oil's flashpoint

B) To assess the oil's viscosity

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Question 4:

Why is it important to regularly measure the Total Base Number (TBN) of lubricating oil on board?

B) To assess the oil’s ability to neutralize acids

C) To check for the presence of water

A) To determine the oil’s viscosity

D) To verify the oil's temperature resistance

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Question 3:

How can the presence of water in the lubricating oil be detected on board a vessel?

B) By conducting a crackle test

C) By measuring the oil's density

A) By checking the oil’s color and odor

D) By observing the oil pressure gauge readings

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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?

C) Allowing the engine to run with contaminated oil

D) Reducing the engine’s load

A) Using a low-quality oil

B) Regularly replacing the oil filters

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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

C) By smelling the oil for unusual odors

D) By observing the oil pressure gauge readings

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

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Question 2:

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

B) To remove water and particulate contaminants from the oil

C) To increase the oil's viscosity

D) To add additives to the oil

A) To cool the lubricating oil

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