MDE 11 Q7

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

C) By cooling the oil to reduce its viscosity significantly

D) By making the oil more acidic to enhance separation

B) By increasing the operational temperature to improve separation

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

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

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

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

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

A) To chemically treat the fuel to prevent oxidation.

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

A) The filter uses centrifugal force to separate contaminants from the oil.

C) The filter utilizes a series of mesh screens to trap and remove particles from the oil.

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

D) The filter heats the oil to evaporate water and other contaminants.

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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.

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

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

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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

B) Increasing the oil temperature

D) Using a different type of oil

A) Reducing the separator’s rotational speed

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Which factor regarding oil condition affects the discharge frequency of a lubricating oil purifier?

B) The oil’s color

D) The oil’s contamination level

C) The oil’s viscosity

A) The oil’s age

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Question 3: What happens to the larger water droplets formed in a coalescer type filter?

A) They are absorbed by a desiccant material.

C) They are mixed back into the fuel to improve lubrication.

B) They are collected in a water separator and drained off.

D) They are filtered out by a secondary filter.

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