MDE 14 End of Unit Quiz

MDE 14 End Of Unit Quiz

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Question 6:

Which component prevents the starter motor from operating when the engine is already running?

B) Ignition switch

A) Starter relay

D) Starter inhibitor switch

C) Neutral safety switch

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Question 2:

Which component of the electric starting system provides the electrical power needed to turn the starter motor?

B) Starter motor

D) Voltage regulator

A) Alternator

C) Battery

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Question 5:
During a routine check, what should be done if moisture is found in the air motor's air supply line?

A) Replace the entire air supply line

C) Increase the air pressure to blow out the moisture

B) Drain the moisture and inspect the air dryer or moisture separator

D) Lubricate the air motor components more frequently

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Question 1:
Which of the following is a safety device commonly fitted to the air starting system of a large medium-speed marine diesel engine?

C) Fuel oil purifier

A) Pressure relief valve

B) Exhaust gas temperature sensor

D) Governor actuator

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Question 3:
In an air starting system, the interlock system is designed to:

B) Maintain constant air pressure in the starting air system

C) Regulate the amount of fuel injected during startup

D) Monitor the lube oil temperature during engine start-up

A) Ensure that the engine cannot be started unless the turning gear is disengaged

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Question 2:
What is the function of the starting air interlock in a direct air start medium-speed diesel engine?

A) To prevent the engine from starting if the cooling water temperature is too low

B) To ensure that the fuel valves are in the open position

D) To ensure that the crankcase doors are properly secured

C) To prevent starting if the main starting air valve is not fully open

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Question 3: During an attempt to start a large marine diesel engine, you find that no air is being delivered to the cylinders. What could be a likely cause?

B. Exhaust valve stuck in the open position.

C. Closed starting air supply valve.

A. Faulty fuel pump.

D. Low cylinder compression.

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Question 3:
How does the timing of the air start valve's opening relate to the inlet and exhaust valves' operation in a four-stroke diesel engine?

B) The air start valve opens when the inlet valve is open and the exhaust valve is closed

D) The air start valve opens when the inlet valve is closed and the exhaust valve is open

C) The air start valve opens when both the inlet and exhaust valves are open

A) The air start valve opens when both inlet and exhaust valves are closed

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Question 2: If an engine does not start when initiating the start sequence, and the air start lever is in the correct position, what should be the next step?

D. Check the engine cooling water temperature.

C. Verify the correct positioning of the camshaft.

B. Inspect the turbocharger for blockages.

A. Check for leaks in the starting air system.

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Question 4:
What is a common sign that the air motor’s exhaust port needs to be inspected or cleaned?

D) Oil leaks around the air motor housing

C) Unusual noise from the air motor

B) Increased air pressure in the system

A) Reduced engine starting speed

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Question 3:
Why is it important to inspect the condition of the air motor’s drive gear during routine maintenance?

B) To ensure the gear is properly aligned with the engine's flywheel

A) To check for signs of overheating

D) To confirm the air pressure is within the specified range

C) To verify the air motor's air intake is clear

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Question 1: When initiating the start sequence on a large medium-speed marine diesel engine with individual air starting valves, the engine fails to start. Which of the following is the first check you should perform?

C. Check the condition of the fuel injectors.

B. Check if the main starting air receiver is pressurized.

A. Check the air start valve timing.

D. Check the lube oil level in the sump.

Your score is