MDE 7 End of Unit Quiz

MDE 7 End Of Unit Quiz

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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?

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

B) The trip mechanism automatically resets once the speed decreases

A) The trip mechanism remains engaged until manually reset

D) The mechanism continues to trip intermittently

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Overspeed Trip

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

C) Increases engine speed to manage high RPMs

D) Deactivates the fuel pump to reduce speed

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

A) Activates a warning alarm when speed limits are exceeded

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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?

A) Increase the engine speed to maximum RPM

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

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

D) Completely drain the lubricating oil from the engine

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High Coolant Temperature Trip

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

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

D) Allows the engine to continue operating at higher temperatures

B) Activates a cooling fan to lower temperature

A) Provides additional cooling when temperatures rise

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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?

D) Reset the alarm and shutdown system to factory settings

C) Replace the temperature sensor with a new one

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

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

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Question 2: Which safety cut-out is designed to prevent engine operation in the event of low oil pressure?

C) Low coolant level sensor

A) Oil pressure cut-out

B) High-temperature trip

D) High exhaust temperature trip

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8. Gearbox Temperature Sensor

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

A) To control the gearbox oil level

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

D) To ensure smooth gear changes

C) To monitor the gearbox speed

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1. Low Oil Pressure Alarm

Question: What is the primary reason for fitting a low oil pressure alarm to a propulsion engine?

C) To warn of inadequate lubrication that could lead to engine damage

B) To ensure the engine does not overheat

A) To alert the crew of excessive fuel consumption

D) To maintain proper engine speed

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3. Overload Clutch

Question: What is the purpose of an overload clutch in a gearbox arrangement?

A) To increase the engine’s fuel efficiency

B) To protect the gearbox from damage due to excessive torque

D) To ensure smooth gear shifting

C) To maintain a constant engine speed

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

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

D) To adjust the fuel injection timing

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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?

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

D) Adjust the engine speed to match the set points

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

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

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