MDE 11 Q7

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Question 1:

Which of the following is the primary function of a centrifugal type lubricating oil filter in a diesel engine?

A) To filter out large solid particles using a mesh

B) To separate water from the oil by heating it

C) To remove contaminants from the oil by using centrifugal force

D) To cool down the lubricating oil using a cooling coil

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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?

D) Reducing the engine’s load

A) Using a low-quality oil

C) Allowing the engine to run with contaminated oil

B) Regularly replacing the oil filters

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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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Question 5:

Which onboard test can be used to assess the viscosity of lubricating oil in a medium-speed diesel engine?

A) Crackle test

C) Blotter spot test

D) Flashpoint test

B) Viscometer test

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

C) Using higher-viscosity oil

A) Regularly changing the air filter

D) Cleaning the fuel injectors

B) Ensuring proper engine warm-up before operation

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

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

B) Because high temperatures can cause oil degradation and carryover

A) Because oil becomes too dense and clogs the separator

C) Because low temperatures increase oil viscosity too much

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How can water in engine oil impact engine performance?

A) It enhances fuel efficiency

C) It decreases the engine’s noise level

B) It can lead to engine knocking and reduced performance

D) It improves engine power output

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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.

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

A) To chemically treat the fuel to prevent oxidation.

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

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