MDE 16 End of Unit Quiz

MDE 16 End Of Unit Quiz

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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

A) Fuel contamination; replace the fuel filter

C) Faulty starter motor; replace starter

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Question 4:

A diesel engine is producing a thumping noise during operation. Which of the following is a probable cause?

A. Broken engine mounts

C. Misaligned crankshaft

B. Loose timing chain

D. Excessive carbon build-up in the combustion chamber

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Question 1:

Which of the following is a common cause of a leaking cylinder air start valve?

C) Overheating of the cylinder head

D) Excessive fuel injection pressure

B) Worn or damaged valve seating

A) Insufficient engine lubrication

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

D. Reduce the engine speed to lower the temperature

B. Cool the pipework with water or air

C. Check for and clear any obstructions in the pipework

A. Increase the air pressure to the air start system

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Question 3:

What could be a potential cause of a leaking cylinder air start valve?

A) High cooling water temperature

D) Low fuel viscosity

C) Over-torquing of the cylinder head bolts

B) Debris lodged in the valve seat

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Question:

Which of the following actions can help avoid spurious sump level alarms in a marine diesel engine?

C. Overfilling the sump with oil

A. Regular calibration and testing of the level sensor

D. Running the engine at a lower load

B. Increasing the oil viscosity

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Question 5:

If unstable engine speed is caused by a problem with the turbocharger, what should be checked?

A) Turbocharger oil supply

D) Air intake temperature sensor

B) Engine coolant level

C) Exhaust manifold gasket

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Question 4: What should be done if the air start valve continues to leak after cleaning and inspection?

C) Install a temporary bypass to maintain engine operation

D) Reduce the engine load and continue running

B) Replace the air start valve with a new one

A) Apply lubricant to the valve to reduce leakage

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Question 3:
How can the likelihood of abnormal turbocharger vibration due to bearing wear be minimized?

C. Reducing the turbocharger's rotational speed

D. Using a different fuel type

B. Ensuring adequate lubrication and regular inspection of turbocharger bearings

A. Increasing the engine operating temperature

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

D) Low turbocharger speed

C) Overheating of the turbocharger housing

B) Build-up of deposits on the turbine wheel

A) Insufficient fuel supply

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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

B) Repair or replace the radiator fan

A) Increase engine RPM

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Question 3:

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

D) Low battery voltage

B) Faulty engine control unit (ECU)

A) Worn timing belt

C) Leaking cylinder head gasket

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