MDE 11 End of Unit Quiz

MDE 11 End Of Unit Quiz

1 / 12

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

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.

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

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

2 / 12

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

D) To verify the oil's temperature resistance

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

A) To determine the oil’s viscosity

3 / 12

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

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.

D) The filter causes small droplets of water or other liquids to merge into larger droplets, which are then separated from the oil.

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

4 / 12

How can condensation in the engine contribute to water contamination of the lubricating oil?

B) It results from improper combustion

A) It forms due to oil breakdown

C) It occurs when the engine is not run at high enough temperatures

D) It is caused by excessive fuel combustion

5 / 12

What is one of the primary effects of water contamination in engine oil?

C) Formation of oil sludge

B) Increased oil viscosity

A) Improved lubrication properties

D) Reduced engine temperature

6 / 12

What role does the oil flow rate play in determining the discharge frequency of a lubricating oil purifier?

C) The flow rate has no impact on discharge frequency

A) A higher flow rate results in lower discharge frequency

D) The flow rate affects the type of contaminants collected

B) A higher flow rate results in higher discharge frequency

7 / 12

Which component failure is likely to introduce water into the engine lubricating oil?

C) A damaged water pump

B) A cracked oil pan

D) A failing oil pump

A) A malfunctioning turbocharger

8 / 12

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

B) By lowering the temperature of the oil

C) By increasing the pressure in the separator

A) By preventing oil leakage through seal and joint failures

D) By altering the oil’s chemical properties

9 / 12

Question 1:

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

A) Regularly changing the oil with fresh oil

D) Increasing the engine's operating temperature

B) Periodically cleaning the oil using a centrifugal separator

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

10 / 12

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

C) They are dissolved in the oil and carried away

D) They are filtered through a paper element

A) They are trapped in a mesh screen

11 / 12

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.

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.

A) To chemically treat the fuel to prevent oxidation.

12 / 12

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

B) Ensuring proper engine warm-up before operation

C) Using higher-viscosity oil

A) Regularly changing the air filter

D) Cleaning the fuel injectors

Your score is