MDE 7 End of Unit Quiz

MDE 7 End Of Unit Quiz

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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

D) To adjust the fuel injection timing

A) To prevent fuel contamination

B) To automatically refuel the engine

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Overspeed Trip of the Centrifugal Type

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

D) To measure the engine’s oil pressure

B) To monitor the engine temperature

C) To prevent engine damage by stopping the engine if it exceeds a predetermined speed

A) To regulate the engine fuel supply

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

D) High exhaust temperature trip

C) Low coolant level sensor

A) Oil pressure cut-out

B) High-temperature trip

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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

A) Permanently increase the engine's lubricating oil pressure

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

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

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10. Lube Oil Filter Differential Pressure Gauge

Question: What is the purpose of a differential pressure gauge on the lube oil filter in a propulsion engine?

C) To regulate the flow rate of the lube oil

D) To increase the engine’s power output

A) To measure the oil’s viscosity

B) To monitor the pressure difference across the filter and indicate when it needs cleaning or replacement

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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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3. Overload Clutch

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

D) To ensure smooth gear shifting

C) To maintain a constant engine speed

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

A) To increase the engine’s fuel efficiency

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2. High-Temperature Alarm

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

C) To ensure the gearbox remains properly lubricated

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

A) To prevent the engine from running too cold

D) To monitor the fuel temperature

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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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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?

A) Increase the pressure further until the engine stalls

D) Manually shut down the engine and report the fault

B) Immediately replace the pressure sensor and restart the test

C) Verify the calibration of the pressure calibrator and retest

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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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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?

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

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

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