MDE 7 End of Unit Quiz

MDE 7 End Of Unit Quiz

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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

C) It adjusts the engine speed to manage temperature

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

D) It activates an external cooling fan

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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

A) To alert the crew of excessive fuel consumption

B) To ensure the engine does not overheat

D) To maintain proper engine speed

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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

A) To prevent fuel contamination

D) To adjust the fuel injection timing

B) To automatically refuel the engine

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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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Low Fuel Level Cut-Out

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

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

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

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

B) Fuel filter clogging trip

A) Exhaust temperature trip

D) Engine vibration sensor

C) Oil temperature sensor

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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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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?

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

D) Reset the alarm and shutdown system to factory settings

C) Replace the temperature sensor with a new one

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

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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?

A) To regulate the engine fuel supply

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

D) To measure the engine’s oil pressure

B) To monitor the engine temperature

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4. Shaft Brake

Question: Why might a shaft brake be fitted to a propulsion engine?

D) To reduce vibration in the engine room

A) To slow down the engine in an emergency

C) To increase fuel efficiency during low-speed operations

B) To prevent the propeller from rotating when the engine is stopped

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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

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

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

D) Adjust the engine speed to match the set points

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