MDE 16 End of Unit Quiz

MDE 16 End Of Unit Quiz

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Question 3:

Which of the following could cause a whining noise in a diesel engine during operation?

B. Air in the fuel system

D. Faulty oil pump

A. Worn-out bearings

C. Damaged turbocharger

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Question 3:
Which safety precaution should be taken when dealing with hot air start pipework?

D. Temporarily shut down the engine and allow the system to cool

B. Use insulated gloves to handle the pipework

A. Allow the pipework to cool before handling

C. Increase the air start pressure to speed up cooling

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Question 1:
Which of the following is a method to minimize the risk of abnormal turbocharger vibration due to unbalanced rotors?

A. Increasing the fuel injection pressure

B. Regularly balancing the turbocharger rotor assembly

C. Using a larger air filter

D. Decreasing the engine load

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Question 4:

Which condition may lead to a cylinder air start valve leak?

A) Insufficient fuel supply

B) Corrosion or pitting of the valve components

D) High ambient temperature

C) Improper alignment of the crankshaft

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Question 5:

Which of the following scenarios could lead to a false high oil level reading in the main engine sump?

A. Cold engine oil

B. Overfilled oil sump

C. Improperly seated dipstick

D. Engine running at full speed

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

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

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

A) The coupling will overheat and may fail.

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

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Question 1:

Which of the following could cause a sudden drop in the oil level of a main engine sump?

C. Overheating of the engine

B. Clogged fuel filter

A. Oil leakage from a defective gasket or seal

D. Worn-out piston rings

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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

D. Clean the air filters

B. Increase the fuel injection pressure

C. Reduce engine load

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Question 7:

If an engine is overheating due to a failing radiator fan, what should be the corrective action?

D) Replace the fuel pump

C) Adjust the ignition timing

A) Increase engine RPM

B) Repair or replace the radiator fan

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Which of the following are possible causes for black smoke in marine diesel engines? (Select TWO)

D. Coolant leak into the combustion chamber

C. High lubricating oil pressure

B. Insufficient air supply

E. Improper fuel timing

A. Excessive fuel injection

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Question 4:

How can issues with the fuel supply system lead to unstable engine speed, and what is the appropriate remedy?

D) Broken engine mounts; repair mounts

C) Faulty starter motor; replace starter

B) Low engine oil pressure; add oil

A) Fuel contamination; replace the fuel filter

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Question 1:

What is a common cause of diesel engine overheating related to the cooling system?

D) Excessive exhaust back pressure

A) Faulty fuel injectors

B) Low oil pressure

C) Clogged radiator or coolant passages

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