MDE 7 End of Unit Quiz

MDE 7 End Of Unit Quiz

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Verifying Set Points on HT Cooling Water Alarm and Shutdown

Question 3: After manually testing the high-temperature alarm and shutdown set points, what should be done to verify the accuracy of these set points?

B) Record the temperatures at which the alarm and shutdown occurred and compare them with the set points

D) Reset the alarm and shutdown system to factory settings

A) Run the generator at full load for an extended period

C) Replace the temperature sensor with a new one

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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?

B) To ensure the engine continues running without alarms

D) To decrease the engine's operating temperature

A) To increase the lubricating oil viscosity

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

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High Coolant Temperature Trip

Question 3: How does a high coolant temperature trip function in a diesel engine?

D) Allows the engine to continue operating at higher temperatures

C) Senses coolant temperature and halts engine operation when overheating occurs

A) Provides additional cooling when temperatures rise

B) Activates a cooling fan to lower temperature

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5. Oil Mist Detector

Question: What is the reason for fitting an oil mist detector in a propulsion engine’s crankcase?

A) To monitor the oil level

D) To ensure the oil is properly filtered

B) To detect the presence of oil mist that could indicate a crankcase explosion risk

C) To measure the viscosity of the engine oil

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6. Vibration Sensor

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

A) To reduce noise levels in the engine room

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

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Manual Testing of HT Cooling Water High-Temperature Alarm

Question 1: What is the first step in manually testing the set point for the high-temperature alarm on a diesel generator’s HT cooling water system?

C) Gradually heat the HT cooling water while monitoring the temperature

B) Isolate the temperature sensor from the control system

D) Bypass the high-temperature sensor

A) Increase the engine load to maximum capacity

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7. Emergency Stop Button

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

D) To maintain engine RPM during high-load conditions

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

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Question 4: What happens to the centrifugal overspeed trip mechanism if the engine speed returns to normal after an overspeed condition?

D) The mechanism continues to trip intermittently

C) The trip mechanism requires a complete engine shutdown for reset

A) The trip mechanism remains engaged until manually reset

B) The trip mechanism automatically resets once the speed decreases

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Verifying Set Points on Lubricating Oil Low-Pressure Alarm and Shutdown

Question 3: How should the set points be verified after manually testing the lubricating oil low-pressure alarm and shutdown?

C) Increase the lubricating oil pressure to the maximum allowed value

D) Adjust the engine speed to match the set points

B) Compare the alarm and shutdown activation pressures with the specified set points

A) Run the engine without lubricating oil and observe the results

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8. Gearbox Temperature Sensor

Question: What is the role of a gearbox temperature sensor in a propulsion engine arrangement?

B) To detect excessive heat that could damage the gearbox components

A) To control the gearbox oil level

D) To ensure smooth gear changes

C) To monitor the gearbox speed

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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?

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

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

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

A) By disconnecting the shutdown system and running the generator

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9. Propeller Shaft Bearing Temperature Sensor

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

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

C) To monitor the bearing's rotational speed

A) To maintain the engine’s RPM

D) To adjust the propeller pitch automatically

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