MDE 11 Q4

1 / 11

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

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

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

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

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

2 / 11

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

C) By reducing the separator’s rotational speed

D) By altering the oil's chemical composition

3 / 11

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

D) Using a different type of oil

C) Regularly cleaning and maintaining the separator

A) Reducing the separator’s rotational speed

B) Increasing the oil temperature

4 / 11

Which operational issue can result in oil carryover in a centrifugal separator?

C) Low oil temperature

A) High oil pressure

B) Inadequate maintenance of the separator

D) Correctly adjusted separator settings

5 / 11

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

A) Because oil becomes too dense and clogs the separator

C) Because low temperatures increase oil viscosity too much

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

B) Because high temperatures can cause oil degradation and carryover

6 / 11

Why is it important to use the correct type of oil for a specific separator?

B) To match the oil viscosity with the separator’s operational requirements

A) To ensure the oil does not degrade the separator material

D) To make the oil more prone to contamination

C) To reduce the oil’s flash point

7 / 11

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

D) By altering the oil’s chemical properties

A) By preventing oil leakage through seal and joint failures

B) By lowering the temperature of the oil

C) By increasing the pressure in the separator

8 / 11

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

A) Operating the separator at a high temperature

B) Regularly monitoring and adjusting the separator’s speed

C) Using a higher viscosity oil

D) Reducing the frequency of separator maintenance

9 / 11

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

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

10 / 11

What effect does high operational speed have on oil losses in a centrifugal separator?

D) It has no impact on oil losses

B) It increases the likelihood of oil carryover

A) It decreases the efficiency of oil separation

C) It improves the separation of contaminants

11 / 11

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

D) Incorrect oil type used

C) Incomplete separation of contaminants

B) Excessive oil viscosity

A) Overheating of the separator

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