MDE 7 End of Unit Quiz

MDE 7 End Of Unit Quiz

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Manual Testing of Lubricating Oil Low-Pressure Shutdown

Question 2: During the manual testing of the lubricating oil low-pressure shutdown set point, what should you do if the shutdown does not activate at the expected pressure?

B) Immediately replace the pressure sensor and restart the test

A) Increase the pressure further until the engine stalls

C) Verify the calibration of the pressure calibrator and retest

D) Manually shut down the engine and report the fault

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2. High-Temperature Alarm

Question: Why is a high-temperature alarm fitted to the cooling system of a propulsion engine?

B) To alert the crew of excessive engine temperature that could cause overheating and damage

A) To prevent the engine from running too cold

C) To ensure the gearbox remains properly lubricated

D) To monitor the fuel temperature

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Manual Testing of HT Cooling Water High-Temperature Shutdown

Question 2: How is the high-temperature shutdown set point manually tested on a diesel generator?

A) By disconnecting the shutdown system and running the generator

B) By gradually heating the HT cooling water until the shutdown occurs

D) By simulating a high-temperature condition using an external device

C) By lowering the HT cooling water temperature to below the set point

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Safety Cut-Outs/Trips for Diesel Engines

Question 1: What is the primary function of an overspeed trip in a diesel engine?

D) To adjust the intake air flow

B) To stop the engine if it exceeds a specified speed

C) To monitor the engine oil temperature

A) To control the fuel injection rate

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4. Shaft Brake

Question: Why might a shaft brake be fitted to a propulsion engine?

D) To reduce vibration in the engine room

A) To slow down the engine in an emergency

B) To prevent the propeller from rotating when the engine is stopped

C) To increase fuel efficiency during low-speed operations

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Final System Check After Testing

Question 5: What is the purpose of performing a final system check after testing the lubricating oil low-pressure alarm and shutdown?

D) To decrease the engine's operating temperature

B) To ensure the engine continues running without alarms

C) To confirm that the pressure alarm and shutdown system are functioning correctly after being reset

A) To increase the lubricating oil viscosity

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Question 4: What is the purpose of a low fuel level cut-out in a diesel engine?

D) To adjust the fuel injection timing

C) To stop the engine if the fuel level falls below a certain point

B) To automatically refuel the engine

A) To prevent fuel contamination

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Manual Testing of Lubricating Oil Low-Pressure Alarm

Question 1: What is the first step in manually testing the set point for the low-pressure alarm on a diesel engine’s lubricating oil system using a pressure calibrator?

C) Gradually decrease the applied pressure using the pressure calibrator while monitoring the alarm system

B) Disconnect the lubricating oil pressure sensor from the control system

A) Increase the engine speed to maximum RPM

D) Completely drain the lubricating oil from the engine

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Question 5: Which safety cut-out is specifically designed to detect and prevent excessive exhaust gas temperatures?

B) Fuel filter clogging trip

A) Exhaust temperature trip

D) Engine vibration sensor

C) Oil temperature sensor

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6. Vibration Sensor

Question: What is the purpose of a vibration sensor on a propulsion engine?

C) To ensure the engine operates at the correct speed

B) To monitor and detect abnormal vibrations that could indicate mechanical failure

D) To regulate the engine temperature

A) To reduce noise levels in the engine room

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Oil Pressure Cut-Out

Question 2: How does an oil pressure cut-out function in a diesel engine?

C) Monitors oil pressure and stops the engine when pressure is too low

D) Increases engine speed to manage oil pressure

B) Activates an external pump to boost oil pressure

A) Allows the engine to run regardless of oil pressure

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7. Emergency Stop Button

Question: Why is an emergency stop button fitted to a propulsion engine control system?

A) To reduce fuel consumption during idle periods

B) To quickly shut down the engine in case of an emergency

C) To enable faster engine startup

D) To maintain engine RPM during high-load conditions

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