MDE 16 End of Unit Quiz

MDE 16 End Of Unit Quiz

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Question 3:

How can a blocked oil filter lead to low lubricating oil pressure, and what is the appropriate remedy?

B) It causes oil to leak; tighten the oil filter

D) It increases oil temperature; cool the oil

C) It dilutes the oil; change the oil

A) It restricts oil flow; replace the oil filter

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Question 5:

What might be the cause of a high-pitched squealing noise in a diesel engine?

D. Low coolant level

A. Loose or worn-out fan belt

B. Worn-out valve guides

C. Clogged air filter

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Question 5:

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

D. To avoid using the auxiliary engine for longer periods

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

A. To burn off excess lubricating oil

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

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Question:
With reference to fluid couplings for the main propulsion shaft, how may the transmitted torque be varied?

D) By adjusting the clearance between the impeller and turbine

C) By varying the temperature of the fluid

B) By changing the fluid viscosity in the coupling

A) By adjusting the engine speed directly

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Question 3:

Which of the following is a potential reason for fluctuating oil levels in the main engine sump during operation?

C. Variations in engine load

A. Excessive blow-by gases

B. Oil pump malfunction

D. Worn-out main bearings

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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?

B. Blocked fuel injector

A. Loose or worn-out valve lifters

D. Worn-out piston rings

C. Damaged crankshaft

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Question 1:

Which of the following could cause a sudden drop in the oil level of a main engine sump?

A. Oil leakage from a defective gasket or seal

C. Overheating of the engine

B. Clogged fuel filter

D. Worn-out piston rings

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

E. Improper fuel timing

C. High lubricating oil pressure

A. Excessive fuel injection

D. Coolant leak into the combustion chamber

B. Insufficient air supply

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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

B) Inspect and replace worn bearings in the turbocharger

C) Increase the turbocharger's operating temperature

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Question 5:

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

C) Exhaust manifold gasket

A) Turbocharger oil supply

D) Air intake temperature sensor

B) Engine coolant level

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Question 2: What could be a reason for high bearing temperatures in a diesel engine due to issues with the lubricating oil?

A) Low oil viscosity

C) Excessive oil pressure

B) Overheating of cooling water

D) Low lubricating oil 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

A) Insufficient fuel supply

B) Build-up of deposits on the turbine wheel

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