MDE 14 End of Unit Quiz

MDE 14 End Of Unit Quiz

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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 2:

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

D) Turbocharger

C) Air compressor

A) Hydraulic pump

B) Fuel filter

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Question 1:
At what approximate crank angle does the air start valve typically begin to open on a four-stroke diesel engine during the starting process?

C) 270° after TDC

A) 0° (TDC)

D) 360° (BDC)

B) 90° after TDC

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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?

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

C) Increase the air pressure to blow out the moisture

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

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

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

A) To check for signs of overheating

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

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Question 1:
What is the primary purpose of regularly checking the air pressure in the air motor starting system?

A) To ensure the air motor operates at the correct speed

C) To prevent the air motor from overheating

B) To maintain the correct fuel-air mixture

D) To avoid excessive wear on the engine's crankshaft

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Question 3:

How is the solenoid activated in a solenoid-operated starting system?

B) By an electronic control unit (ECU)

A) By a mechanical switch

D) By a current flowing through its coil

C) By a push-button on the dashboard

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Question 4: What should be inspected if there is air leakage during the start sequence of a marine diesel engine?

A. Fuel injection timing.

C. Piston ring clearance.

D. Turbocharger speed.

B. Starting air valve condition.

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Question 4:

Which of the following describes the role of the starter motor in the electric starting system?

C) To crank the engine and initiate combustion

B) To provide cooling to the engine

A) To generate electrical power for the ignition system

D) To regulate the engine’s fuel injection

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Question 2:

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

C) Battery

A) Alternator

B) Starter motor

D) Voltage regulator

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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?

B. Incorrect fuel injection timing.

C. Low engine coolant level.

A. Air start valve stuck in the open position.

D. Excessive crankcase pressure.

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Question 1:
Which of the following interlocks is most commonly fitted to a direct air start medium-speed diesel engine to prevent the engine from starting if the turning gear is engaged?

B) Turning gear engagement interlock

C) Lube oil pressure interlock

A) Over-speed trip interlock

D) Fuel injection interlock

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