MDE 11 Q7

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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

C) By measuring the oil's density

D) By observing the oil pressure gauge readings

B) By conducting a crackle test

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

D) By making the oil more acidic to enhance separation

C) By cooling the oil to reduce its viscosity significantly

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

B) By increasing the operational temperature to improve separation

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

A) It can improve oil circulation

B) It can lead to oil pump cavitation

C) It can decrease the oil pressure

D) It can reduce oil flow through the engine

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

B) Increased oil viscosity

A) Improved lubrication properties

C) Formation of oil sludge

D) Reduced engine temperature

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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

A) By visually inspecting the oil color

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

D) By observing the oil pressure gauge readings

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

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.

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

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

C) Using a higher viscosity oil

B) Regularly monitoring and adjusting the separator’s speed

A) Operating the separator at a high temperature

D) Reducing the frequency of separator maintenance

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

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

B) It results from improper combustion

D) It is caused by excessive fuel combustion

A) It forms due to oil breakdown

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