MDE 11 End of Unit Quiz

MDE 11 End Of Unit Quiz

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Question 2: How does a coalescer filter separate water from distillate fuel oil?

A) By using a magnetic field to attract water particles.

B) By passing the fuel through a hydrophobic membrane that repels water.

D) By heating the fuel to evaporate the water content.

C) By using a series of filter media that cause small water droplets to merge into larger droplets, which are then easily separated.

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Question 4:

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

A) To determine the oil’s viscosity

D) To verify the oil's temperature resistance

C) To check for the presence of water

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

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Question 3:

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

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

A) They are trapped in a mesh screen

C) They are dissolved in the oil and carried away

D) They are filtered through a paper element

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Which of the following factors influence the efficiency of a centrifugal separator in a diesel engine's lubrication system?

A) Rotor speed, oil temperature, viscosity of the oil, and the amount of contaminants present

D) The amount of water in the oil, the presence of fuel additives, the engine's cooling system, and the oil's pH level

B) The type of oil used, the color of the oil, the engine's RPM, and the size of the fuel injectors

C) The age of the oil, the type of fuel used, ambient air temperature, and the size of the engine

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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

C) By smelling the oil for unusual odors

A) By visually inspecting the oil color

D) By observing the oil pressure gauge readings

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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

A) It enhances the oil’s lubricating properties

C) It makes the oil more resistant to high temperatures

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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

B) Because high temperatures can cause oil degradation and carryover

C) Because low temperatures increase oil viscosity too much

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

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Question 2:

What is the main component in a centrifugal lubricating oil filter that creates the necessary centrifugal force?

D) A heating element

A) A stationary disc stack

B) A rotating bowl or rotor

C) A series of fixed blades

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How can water in engine oil impact engine performance?

D) It improves engine power output

A) It enhances fuel efficiency

C) It decreases the engine’s noise level

B) It can lead to engine knocking and reduced performance

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

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

B) By lowering the temperature of the oil

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What problem can water in engine oil cause in terms of oil circulation?

A) It can improve oil circulation

D) It can reduce oil flow through the engine

B) It can lead to oil pump cavitation

C) It can decrease the oil pressure

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Question 4: Which of the following is a key advantage of using a coalescer type filter in a distillate fuel oil system?

C) It chemically alters the fuel to improve combustion efficiency.

D) It reduces the sulfur content of the fuel.

B) It is capable of removing both solid and water contaminants simultaneously.

A) It requires no maintenance and operates indefinitely.

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