MDE 16 End of Unit Quiz

MDE 16 End Of Unit Quiz

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Question 7:

How can a leaking oil line or gasket contribute to low lubricating oil pressure, and what is the appropriate solution?

B) It increases oil viscosity; change the oil

D) It raises oil temperature; improve cooling

A) It allows oil to escape; repair or replace the damaged line or gasket

C) It contaminates the oil; replace the oil filter

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Question:
How can the problem of excessively hot air start pipework on a diesel engine be minimized?

A. Increase the air pressure in the start system

D. Increase the cooling water flow to the engine

C. Reduce the engine load to lower the temperature

B. Ensure proper insulation of the pipework

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Question:
Which of the following is an effective remedy for the burning of lubricating oil in marine diesel engines?

A. Replace worn piston rings

B. Increase the fuel injection pressure

C. Reduce engine load

D. Clean the air filters

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Question: How can a leaking cylinder air start valve be detected while the engine is running?

C) By checking for exhaust gas temperature fluctuations

D) By monitoring for a hissing sound near the air start valve manifold

B) By listening for unusual knocking noises in the engine

A) By observing a drop in lubricating oil pressure

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Question 2: What could be a reason for high bearing temperatures in a diesel engine due to issues with the lubricating oil?

A) Low oil viscosity

C) Excessive oil pressure

D) Low lubricating oil temperature

B) Overheating of cooling water

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Question 2:

What could be a likely cause of a rattling noise coming from the top end of a diesel engine?

B. Blocked fuel injector

C. Damaged crankshaft

D. Worn-out piston rings

A. Loose or worn-out valve lifters

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Question 4:
What is the most effective way to reduce the risk of abnormal turbocharger vibration caused by misalignment during assembly?

A. Using high-quality fuel filters

B. Ensuring precision alignment during turbocharger installation

C. Increasing the clearance in the turbocharger housing

D. Frequently changing the turbocharger oil

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Question 5:

If a diesel engine is overheating due to excessive engine load, what should be done to remedy the situation?

C) Adjust the air intake

D) Clean the fuel injectors

B) Increase the fuel supply

A) Reduce engine load

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Question 3: If debris is found to be the cause of the air start valve leak, what is the recommended procedure?

D) Temporarily block off the air supply to the valve and continue operation

A) Replace the valve immediately with a new one

C) Increase the air pressure to blow out the debris

B) Clean the valve and seating area, and then reinstall

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Question 5:
What happens if the fluid level in a fluid coupling is too low?

A) The coupling will overheat and may fail.

C) The coupling will slip excessively, reducing power transmission.

B) The coupling will transmit too much power, causing engine overload.

D) The coupling will become too rigid and lose its damping effect.

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Question 3:

What action should be taken if low coolant levels are causing engine overheating?

D) Clean the air filter

B) Add coolant to the system

C) Flush the coolant

A) Replace the radiator cap

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Question 3:

What is a potential cause of unstable engine speed related to the engine's electronic control system?

C) Leaking cylinder head gasket

D) Low battery voltage

B) Faulty engine control unit (ECU)

A) Worn timing belt

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