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?

C) Faulty starter motor; replace starter

D) Broken engine mounts; repair mounts

A) Fuel contamination; replace the fuel filter

B) Low engine oil pressure; add oil

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Question 2: After shutting down the engine due to a leaking air start valve, what should be done next?

D) Re-start the engine to see if the leak persists

A) Replace the air start valve immediately without further inspection

B) Inspect the valve and seating area for damage or debris

C) Clean the valve using pressurized air while it is still installed

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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

A. Increasing the engine operating temperature

B. Ensuring adequate lubrication and regular inspection of turbocharger bearings

D. Using a different fuel type

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Question 3:

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

B) Faulty engine control unit (ECU)

D) Low battery voltage

A) Worn timing belt

C) Leaking cylinder head gasket

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Question 4:

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

A) Insufficient fuel supply

D) High ambient temperature

B) Corrosion or pitting of the valve components

C) Improper alignment of the crankshaft

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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

C) Reducing the exhaust temperature

B) Ensuring proper alignment of the turbocharger shaft

A) Increasing the fuel injection pressure

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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?

C. Using a larger air filter

D. Decreasing the engine load

A. Increasing the fuel injection pressure

B. Regularly balancing the turbocharger rotor assembly

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Question 2:

If a diesel engine is overheating due to a malfunctioning thermostat, what is the appropriate remedy?

C) Increase engine load

A) Clean the fuel system

B) Replace the thermostat

D) Adjust the timing

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Question 1:

Which of the following is a possible cause of knocking noise in a diesel engine during operation?

C. Low oil pressure

B. Worn-out cylinder liner

D. Faulty air intake system

A. Incorrect fuel injection timing

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Question 4:
How can you minimize abnormal turbocharger vibration caused by shaft misalignment?

C) By increasing the exhaust back pressure

B) By regularly checking and adjusting the shaft alignment

D) By reducing the turbocharger's rotational speed

A) By using a thicker grade of lubricating oil

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Question:
The air start pipework on a diesel engine attached to the cylinder head is becoming extremely hot. What is the most probable cause?

A. Insufficient air supply pressure to the air start system

C. Excessive exhaust gas temperature due to incorrect fuel mixture

B. Air leak in the pipework allowing hot gases to escape

D. Blockage or restriction in the air start pipework

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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?

C. Improperly seated dipstick

A. Cold engine oil

D. Engine running at full speed

B. Overfilled oil sump

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