MDE 11 Q6

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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

D) By observing the oil pressure gauge readings

A) By checking the oil’s color and odor

2 / 9

Question 1:

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

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

A) Regularly changing the oil with fresh oil

D) Increasing the engine's operating temperature

B) Periodically cleaning the oil using a centrifugal separator

3 / 9

Question 4:

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

C) To check for the presence of water

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

A) To determine the oil’s viscosity

D) To verify the oil's temperature resistance

4 / 9

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

5 / 9

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

A) To cool the lubricating oil

D) To add additives to the oil

6 / 9

Question 3:

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

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

A) By visually inspecting the oil color

D) By observing the oil pressure gauge readings

C) By smelling the oil for unusual odors

7 / 9

Question 4:

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

A) Using a low-quality oil

B) Regularly replacing the oil filters

D) Reducing the engine’s load

C) Allowing the engine to run with contaminated oil

8 / 9

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

A) Visual inspection of the oil’s color

C) Onboard testing for water content and acid number

D) Smelling the oil for any burnt odors

9 / 9

Question 2:

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

B) To assess the oil's viscosity

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

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