MDE 14 End of Unit Quiz

MDE 14 End Of Unit Quiz

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Question 1:

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

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

A) To regulate the fuel flow to the engine

C) To monitor the engine’s oil pressure

D) To cool the battery during operation

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Question 2:

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

D) Voltage regulator

A) Alternator

C) Battery

B) Starter motor

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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?

D) To control the flow of cooling water

B) To regulate the fuel injection timing

A) To prevent backflow of air into the receiver

C) To measure exhaust gas temperature

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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?

B) Crankcase door interlock

C) Exhaust valve interlock

D) Cooling water pressure interlock

A) Crankcase explosion relief valve interlock

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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?

A. Faulty fuel pump.

B. Exhaust valve stuck in the open position.

D. Low cylinder compression.

C. Closed starting air supply valve.

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

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

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

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

D) To ensure that the crankcase doors are properly secured

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Question 2:
During which stroke of a four-stroke diesel engine cycle is the air start valve usually open?

A) Intake stroke

D) Exhaust stroke

C) Power stroke

B) Compression stroke

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Question 5: Which of the following could cause a failure to start in a large marine diesel engine due to an issue with the air starting system?

C. Low engine coolant level.

B. Incorrect fuel injection timing.

A. Air start valve stuck in the open position.

D. Excessive crankcase pressure.

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Question 2:
Which of the following is a key maintenance task for the air motor to prevent corrosion and ensure long-term reliability?

D) Adjusting the valve clearances

B) Cleaning the fuel injectors

C) Replacing the air intake filter

A) Lubricating the air motor components regularly

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

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

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

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

A) To check for signs of overheating

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Question 5:

Which safety interlock prevents the hydraulic oil start system from operating if certain conditions are not met?

C) Engine temperature sensor

B) Battery voltage sensor

A) Hydraulic pressure switch

D) Starting motor relay

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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

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

D) To enhance the lubrication of engine components

A) To assist with fuel injection timing

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