MDE 7 End of Unit Quiz

MDE 7 End Of Unit Quiz

1 / 12

3. Overload Clutch

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

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

A) To increase the engine’s fuel efficiency

D) To ensure smooth gear shifting

C) To maintain a constant engine speed

2 / 12

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

3 / 12

2. High-Temperature Alarm

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

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

D) To monitor the fuel temperature

C) To ensure the gearbox remains properly lubricated

A) To prevent the engine from running too cold

4 / 12

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?

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

A) Permanently increase the engine's lubricating oil pressure

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

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

5 / 12

Question 5: Which of the following is a common maintenance check for the centrifugal overspeed trip mechanism?

D) Calibrating the turbocharger pressure

C) Replacing the engine oil filter

B) Inspecting the condition of the centrifugal weights and springs

A) Checking the engine coolant level

6 / 12

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

A) To prevent fuel contamination

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

B) To automatically refuel the engine

D) To adjust the fuel injection timing

7 / 12

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

A) The trip mechanism remains engaged until manually reset

D) The mechanism continues to trip intermittently

8 / 12

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

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

A) To control the gearbox oil level

C) To monitor the gearbox speed

9 / 12

9. Propeller Shaft Bearing Temperature Sensor

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

C) To monitor the bearing's rotational speed

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

A) To maintain the engine’s RPM

D) To adjust the propeller pitch automatically

10 / 12

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

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

C) Replace the temperature sensor with a new one

11 / 12

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?

D) Bypass the high-temperature sensor

A) Increase the engine load to maximum capacity

B) Isolate the temperature sensor from the control system

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

12 / 12

Question 3: What does a high coolant temperature trip do in a diesel engine?

A) It increases fuel supply to compensate for temperature changes

D) It activates an external cooling fan

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

C) It adjusts the engine speed to manage temperature

Your score is