MDE 7 End of Unit Quiz

MDE 7 End Of Unit Quiz

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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?

A) To alert the crew of excessive fuel consumption

D) To maintain proper engine speed

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

B) To ensure the engine does not overheat

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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

B) To automatically refuel the engine

A) To prevent fuel contamination

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

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8. Gearbox Temperature Sensor

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

D) To ensure smooth gear changes

C) To monitor the gearbox speed

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

A) To control the gearbox oil level

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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

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

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Restoring Normal Operation After Testing

Question 4: After manually testing the lubricating oil low-pressure alarm and shutdown using a pressure calibrator, what should be the next step?

C) Drain the lubricating oil and replace it with new oil

B) Reconnect the pressure sensor and reset the alarm and shutdown systems to their normal settings

D) Increase the engine load to full capacity and monitor the system

A) Permanently increase the engine's lubricating oil pressure

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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?

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

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

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Low Fuel Level Cut-Out

Question 4: How does a low fuel level cut-out function in a diesel engine?

B) Stops the engine when the fuel level drops below a certain threshold

D) Activates an alarm to notify the operator of low fuel levels

C) Allows the engine to continue operating until the fuel level is critically low

A) Automatically refuels the engine when the fuel level is low

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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?

B) The trip mechanism automatically resets once the speed decreases

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

D) The mechanism continues to trip intermittently

A) The trip mechanism remains engaged until manually reset

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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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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?

B) Isolate the temperature sensor from the control system

D) Bypass the high-temperature sensor

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

A) Increase the engine load to maximum capacity

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3. Overload Clutch

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

C) To maintain a constant engine speed

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

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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?

D) Manually shut down the engine and report the fault

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

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