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?

A) Starter relay

B) Ignition switch

D) Starter inhibitor switch

C) Neutral safety switch

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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?

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

A) Replace the entire air supply line

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Question 1:

What is the primary function of the solenoid in a solenoid-operated, battery-powered electric starting system?

D) To cool the battery during operation

B) To engage the starter motor with the engine’s flywheel

C) To monitor the engine’s oil pressure

A) To regulate the fuel flow to the engine

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Question 4:
Which safety device in the air starting system is responsible for releasing excess air to the atmosphere in case of an overpressure condition?

A) Safety valve

B) Air distributor

C) Starting air valve

D) Crankcase relief valve

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Question 3:
Which interlock prevents a medium-speed diesel engine from being started if the engine's crankcase doors are open?

C) Exhaust valve interlock

A) Crankcase explosion relief valve interlock

D) Cooling water pressure interlock

B) Crankcase door interlock

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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.

D. Check the lube oil level in the sump.

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

A. Check the air start valve timing.

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

A) To check for signs of overheating

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

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

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

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Question 2:
What is the primary function of the non-return valve in the air starting system of a medium-speed marine diesel engine?

C) To measure exhaust gas temperature

A) To prevent backflow of air into the receiver

D) To control the flow of cooling water

B) To regulate the fuel injection timing

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Question 1:

What is the primary function of the hydraulic oil start system in a diesel engine?

B) To provide additional cooling to the engine

D) To enhance the lubrication of engine components

A) To assist with fuel injection timing

C) To initiate the engine’s start-up by engaging the starting mechanism

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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?

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

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

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

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

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

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

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

C) Regulate the amount of fuel injected during startup

B) Maintain constant air pressure in the starting air system

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Question 2:

Which of the following components is typically included in a diesel engine hydraulic oil start system?

B) Fuel filter

D) Turbocharger

A) Hydraulic pump

C) Air compressor

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