MDE 11 End of Unit Quiz

MDE 11 End Of Unit Quiz

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

B) By allowing oil to escape through leaks

A) By increasing the oil temperature

D) By altering the oil's chemical composition

C) By reducing the separator’s rotational speed

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

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

A) Because oil becomes too dense and clogs the separator

C) Because low temperatures increase oil viscosity too much

B) Because high temperatures can cause oil degradation and carryover

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

A) Overheating of the separator

B) Excessive oil viscosity

C) Incomplete separation of contaminants

D) Incorrect oil type used

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Question 1: What is the primary function of a coalescer type distillate fuel oil filter?

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

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

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

A) To chemically treat the fuel to prevent oxidation.

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Question 3:

In a centrifugal type lubricating oil filter, how are the contaminants typically collected and separated from the oil?

D) They are filtered through a paper element

B) They are collected on the inner wall of the rotating bowl

C) They are dissolved in the oil and carried away

A) They are trapped in a mesh screen

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Question 4:

Which of the following best describes the process by which a centrifugal filter operates?

D) Oil is passed through a chemical treatment to neutralize acids

C) Oil is spun at high speed to separate contaminants based on density

B) Oil is heated to evaporate water content

A) Oil is passed through a fine mesh to trap solid particles

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

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

B) By increasing the operational temperature to improve separation

C) By cooling the oil to reduce its viscosity significantly

D) By making the oil more acidic to enhance separation

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

C) Using a higher viscosity oil

A) Operating the separator at a high temperature

B) Regularly monitoring and adjusting the separator’s speed

D) Reducing the frequency of separator maintenance

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Question 3:

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

A) By checking the oil’s color and odor

B) By conducting a crackle test

C) By measuring the oil's density

D) By observing the oil pressure gauge readings

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Question 3:

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

C) By smelling the oil for unusual odors

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

D) By observing the oil pressure gauge readings

A) By visually inspecting the oil color

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What is one effective method to minimize oil losses due to incomplete separation in a centrifugal separator?

C) Regularly cleaning and maintaining the separator

D) Using a different type of oil

A) Reducing the separator’s rotational speed

B) Increasing the oil temperature

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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?

D) Flashpoint test

C) Blotter spot test

B) Viscometer test

A) Crackle test

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