MDE 16 End of Unit Quiz

MDE 16 End Of Unit Quiz

1 / 12

Question 5:

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

D. Low coolant level

C. Clogged air filter

A. Loose or worn-out fan belt

B. Worn-out valve guides

2 / 12

Question 3:

What is a critical step in preparing the fuel system of a main propulsion engine before going to sea?

D. Reducing fuel pressure to avoid overloading the engine

B. Draining the fuel tanks to prevent contamination

C. Purging air from the fuel lines to prevent engine misfires

A. Ensuring that fuel filters are bypassed to allow for maximum fuel flow

3 / 12

Question 1: Which of the following is a potential cause of high bearing temperatures in a diesel engine?

D) Oversized bearing clearance

C) Low ambient temperature

A) Excessive lubricating oil flow

B) Improper alignment of the bearing

4 / 12

Question 2: If high bearing temperature persists after reducing engine load, what should be the next step?

C) Add water to the cooling system

B) Check the lubricating oil flow and pressure

A) Continue monitoring until the temperature normalizes

D) Increase the engine speed to circulate more oil

5 / 12

Question:
Which of the following is an effective remedy for insufficient air supply in marine diesel engines?

B. Increase the fuel injection pressure

D. Adjust the fuel injection timing

C. Reduce the engine load

A. Clean or replace the air filters

6 / 12

Question 2:

What might cause the oil level in a main engine sump to rise unexpectedly?

B. Blocked oil filter

D. Air intake restriction

A. Water contamination in the oil

C. Faulty oil pressure gauge

7 / 12

Question 4: After stopping the engine due to high bearing temperature, what is a critical check that should be performed before restarting?

A) Ensure the cooling system is full of water

B) Inspect the bearing for signs of overheating or damage

C) Increase the amount of lubricating oil in the system

D) Clean the air filters to ensure proper airflow

8 / 12

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

C. Excessive fuel injection

A. Overheating of the engine

E. Insufficient air supply

B. Burning of lubricating oil

D. Worn piston rings

9 / 12

Question 2:

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

A) Clean the fuel system

B) Replace the thermostat

D) Adjust the timing

C) Increase engine load

10 / 12

Question 1:
What is a potential consequence of the air start pipework becoming extremely hot?

C. Increased efficiency of the air start system

A. Improved engine starting performance

D. Reduced engine power output

B. Damage to the pipework or surrounding components

11 / 12

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

D) Low lubricating oil temperature

C) Excessive oil pressure

A) Low oil viscosity

B) Overheating of cooling water

12 / 12

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

A) Replace the air start valve immediately without further inspection

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

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

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

Your score is