MDE 16 End of Unit Quiz

MDE 16 End Of Unit Quiz

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Question 1: What is the first action that should be taken if a high bearing temperature is detected in a diesel engine during operation?

A) Increase engine speed to reduce load

D) Add more lubricating oil to the bearing

B) Immediately stop the engine

C) Reduce engine speed and load to minimize heat generation

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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 3:

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

C. Damaged turbocharger

D. Faulty oil pump

B. Air in the fuel system

A. Worn-out bearings

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Question 4:

How can a malfunctioning water pump lead to overheating, and what is the recommended solution?

A) It can cause coolant to leak; replace the water pump

B) It can restrict coolant flow; replace the water pump

C) It can increase oil temperature; replace the oil filter

D) It can cause excessive exhaust temperature; adjust the timing

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Question 4:

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

A) Insufficient fuel supply

C) Improper alignment of the crankshaft

B) Corrosion or pitting of the valve components

D) High ambient temperature

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

A) Change the turbocharger’s air filter

D) Reduce engine load during operation

C) Increase the turbocharger's operating temperature

B) Inspect and replace worn bearings in the turbocharger

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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?

D. Engine running at full speed

A. Cold engine oil

B. Overfilled oil sump

C. Improperly seated dipstick

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Question 2:

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

A) Clean the fuel system

C) Increase engine load

D) Adjust the timing

B) Replace the thermostat

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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?

B) Ensuring proper alignment of the turbocharger shaft

A) Increasing the fuel injection pressure

D) Using lower grade lubricating oil

C) Reducing the exhaust temperature

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Question 2:
Which fluid is most commonly used in a fluid coupling for marine propulsion?

B) Engine oil

D) Diesel fuel

C) Hydraulic oil

A) Water

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Question 2:

If a diesel engine is experiencing unstable speed due to air intake issues, what is the most likely cause?

C) Low coolant level

D) Leaking fuel lines

A) Faulty turbocharger

B) Dirty or blocked air filter

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Question 6:

What could be the effect of a malfunctioning oil pressure relief valve on oil pressure, and how should it be addressed?

A) It can cause high oil pressure; adjust or replace the relief valve

D) It can cause oil temperature issues; check the coolant system

B) It can cause low oil pressure; clean the relief valve

C) It can cause fluctuating oil pressure; replace the oil filter

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