MDE 16 End of Unit Quiz

MDE 16 End Of Unit Quiz

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Question 2:
To prevent abnormal turbocharger vibration, it is important to regularly:

D) Reduce engine load during operation

B) Inspect and replace worn bearings in the turbocharger

C) Increase the turbocharger's operating temperature

A) Change the turbocharger’s air filter

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Question 1: What is the first step to take upon discovering a leaking cylinder air start valve while the engine is running?

D) Manually operate the valve to clear the leak

A) Continue normal operation until the next scheduled maintenance

C) Shut down the engine and isolate the affected cylinder

B) Increase the engine speed to reduce air leakage

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Question 3:
Abnormal turbocharger vibration while operating at a steady speed could be caused by:

D) Low turbocharger speed

B) Build-up of deposits on the turbine wheel

A) Insufficient fuel supply

C) Overheating of the turbocharger housing

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Question 6:

What could be a mechanical cause of unstable engine speed, and how can it be fixed?

A) Worn camshaft; replace the camshaft

D) Loose electrical connections; tighten connections

B) Faulty thermostat; replace the thermostat

C) Low fuel pressure; adjust the fuel pressure regulator

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Question 2:
What immediate action should be taken if the air start pipework is becoming extremely hot?

A. Increase the air pressure to the air start system

B. Cool the pipework with water or air

C. Check for and clear any obstructions in the pipework

D. Reduce the engine speed to lower the temperature

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

B. Incomplete combustion of fuel

D. High engine temperature

E. Cold starting of the engine

A. Water in the fuel

C. Overloading of the engine

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Question:
Which of the following is an effective remedy for excessive fuel injection in marine diesel engines?

C. Replace the fuel injectors

D. Reduce the fuel pump delivery rate

B. Increase the engine speed

A. Adjust the fuel injection timing

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Question 5:

Before leaving port, why is it important to conduct a test run of the main propulsion engine?

A. To burn off excess lubricating oil

D. To avoid using the auxiliary engine for longer periods

B. To ensure that all systems are operating correctly and respond as expected

C. To increase the engine's operating temperature to the maximum

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Question 3: Which of the following could be a possible cause of high bearing temperature in a diesel engine?

B) Improper alignment of the bearing

D) High exhaust gas temperature

A) Excessive cooling water temperature

C) Low fuel injection pressure

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Question 2:

What might cause the oil level in a main engine sump to rise unexpectedly?

C. Faulty oil pressure gauge

D. Air intake restriction

A. Water contamination in the oil

B. Blocked oil filter

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Question 1:
Which of the following is an effective way to minimize the risk of abnormal turbocharger vibration in a diesel engine?

D) Using lower grade lubricating oil

A) Increasing the fuel injection pressure

B) Ensuring proper alignment of the turbocharger shaft

C) Reducing the exhaust temperature

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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

B) Low engine oil pressure; add oil

C) Faulty starter motor; replace starter

A) Fuel contamination; replace the fuel filter

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