MDE 16 End of Unit Quiz

MDE 16 End Of Unit Quiz

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Question 2:

Which of the following is a remedy for low lubricating oil pressure due to worn engine bearings?

B) Clean the oil cooler

C) Rebuild or replace the engine bearings

A) Replace the oil filter

D) Add more oil

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

A) Change the turbocharger’s air filter

B) Inspect and replace worn bearings in the turbocharger

C) Increase the turbocharger's operating temperature

D) Reduce engine load during operation

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Question 4: A possible cause of high bearing temperatures due to operational issues could be:

B) Frequent engine shutdowns

C) Overloading the engine beyond its design capacity

A) Running the engine at lower than recommended speeds

D) Reduced fuel injection pressure

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Question 2:

Which of the following could cause a cylinder air start valve to leak?

C) Low engine oil pressure

A) Incorrect valve timing

B) Build-up of carbon deposits on the valve

D) Excessive turbocharger speed

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Question 1:

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

B) Worn or damaged valve seating

C) Overheating of the cylinder head

A) Insufficient engine lubrication

D) Excessive fuel injection pressure

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

D) Low turbocharger speed

A) Insufficient fuel supply

C) Overheating of the turbocharger housing

B) Build-up of deposits on the turbine wheel

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Question 4:

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

C. Misaligned crankshaft

A. Broken engine mounts

D. Excessive carbon build-up in the combustion chamber

B. Loose timing chain

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Question 3: High bearing temperatures in a diesel engine can result from:

A) Excessive cooling of the bearing

D) Decreased engine load

B) Under-torquing of the bearing bolts

C) Contaminated lubricating oil

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

E. Improper fuel timing

A. Excessive fuel injection

B. Insufficient air supply

C. High lubricating oil pressure

D. Coolant leak into the combustion chamber

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Question 2:

What could be a likely cause of a rattling noise coming from the top end of a diesel engine?

C. Damaged crankshaft

A. Loose or worn-out valve lifters

D. Worn-out piston rings

B. Blocked fuel injector

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Question 5:
To reduce the likelihood of abnormal turbocharger vibration, which of the following should be done during routine maintenance?

C) Increase the lubricating oil viscosity

A) Operate the engine at lower than recommended speeds

B) Inspect for and promptly replace damaged or loose turbine blades

D) Block off the air intake partially

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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

C) Reducing the exhaust temperature

A) Increasing the fuel injection pressure

D) Using lower grade lubricating oil

Your score is