MDE 7 End of Unit Quiz

MDE 7 End Of Unit Quiz

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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?

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

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

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

A) By disconnecting the shutdown system and running the generator

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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

D) Completely drain the lubricating oil from the engine

A) Increase the engine speed to maximum RPM

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9. Propeller Shaft Bearing Temperature Sensor

Question: Why is a temperature sensor fitted to the propeller shaft bearing?

D) To adjust the propeller pitch automatically

A) To maintain the engine’s RPM

B) To detect overheating in the bearing that could lead to failure

C) To monitor the bearing's rotational speed

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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

D) Manually shut down the engine and report the fault

C) Verify the calibration of the pressure calibrator and retest

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Restoring Normal Operation After Testing

Question 4: What is the final step after manually testing the HT cooling water high-temperature alarm and shutdown on a diesel generator?

B) Replace the cooling water with fresh water

C) Reset the alarm and shutdown systems and return the HT cooling system to normal operation

D) Shut down the generator and perform a full inspection

A) Increase the load to ensure the generator is functioning properly

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

D) Engine vibration sensor

B) Fuel filter clogging trip

A) Exhaust temperature trip

C) Oil temperature sensor

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7. Emergency Stop Button

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

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

A) To reduce fuel consumption during idle periods

D) To maintain engine RPM during high-load conditions

C) To enable faster engine startup

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Question 3: What does a high coolant temperature trip do in a diesel engine?

A) It increases fuel supply to compensate for temperature changes

B) It shuts down the engine if the coolant temperature exceeds a set threshold

D) It activates an external cooling fan

C) It adjusts the engine speed to manage temperature

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2. High-Temperature Alarm

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

A) To prevent the engine from running too cold

D) To monitor the fuel temperature

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

C) To ensure the gearbox remains properly lubricated

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6. Vibration Sensor

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

D) To regulate the engine temperature

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

C) To ensure the engine operates at the correct speed

A) To reduce noise levels in the engine room

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Overspeed Trip

Question 1: How does an overspeed trip function in a diesel engine?

D) Deactivates the fuel pump to reduce speed

B) Uses centrifugal force to activate the cut-out when speed exceeds the limit

C) Increases engine speed to manage high RPMs

A) Activates a warning alarm when speed limits are exceeded

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Oil Pressure Cut-Out

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

A) Allows the engine to run regardless of oil pressure

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

B) Activates an external pump to boost oil pressure

D) Increases engine speed to manage oil pressure

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