MDE 14 End of Unit Quiz

MDE 14 End Of Unit Quiz

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

C) To prevent the air motor from overheating

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

B) To maintain the correct fuel-air mixture

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

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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?

A. Check for leaks in the starting air system.

B. Inspect the turbocharger for blockages.

D. Check the engine cooling water temperature.

C. Verify the correct positioning of the camshaft.

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Question 3:

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

A) By a mechanical switch

D) By a current flowing through its coil

C) By a push-button on the dashboard

B) By an electronic control unit (ECU)

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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?

D) Fuel injection interlock

C) Lube oil pressure interlock

A) Over-speed trip interlock

B) Turning gear engagement interlock

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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

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

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Question 4:
The low lube oil pressure interlock in a direct air start medium-speed diesel engine is designed to:

B) Prevent starting if lube oil pressure is below a safe threshold

C) Ensure the fuel pumps are correctly aligned

A) Prevent starting if the oil temperature is too high

D) Ensure that the governor is set to the correct speed

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

D) To ensure that the crankcase doors are properly secured

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

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

C. Piston ring clearance.

B. Starting air valve condition.

D. Turbocharger speed.

A. Fuel injection timing.

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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?

B) Cleaning the fuel injectors

D) Adjusting the valve clearances

A) Lubricating the air motor components regularly

C) Replacing the air intake filter

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Question 2:

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

A) Alternator

C) Battery

D) Voltage regulator

B) Starter motor

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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?

A) Pressure relief valve

C) Fuel oil purifier

D) Governor actuator

B) Exhaust gas temperature sensor

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Question 5:

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

A) Hydraulic pressure switch

C) Engine temperature sensor

B) Battery voltage sensor

D) Starting motor relay

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