MDE 7 End of Unit Quiz

MDE 7 End Of Unit Quiz

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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

C) Oil temperature sensor

A) Exhaust temperature trip

D) Engine vibration sensor

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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?

C) Verify the calibration of the pressure calibrator and retest

D) Manually shut down the engine and report the fault

A) Increase the pressure further until the engine stalls

B) Immediately replace the pressure sensor and restart the test

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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

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

B) By gradually heating the HT cooling water until the shutdown occurs

A) By disconnecting the shutdown system and running the generator

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2. High-Temperature Alarm

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

A) To prevent the engine from running too cold

D) To monitor the fuel temperature

C) To ensure the gearbox remains properly lubricated

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

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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

D) To maintain proper engine speed

A) To alert the crew of excessive fuel consumption

B) To ensure the engine does not overheat

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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

D) To ensure smooth gear shifting

A) To increase the engine’s fuel efficiency

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

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4. Shaft Brake

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

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

D) To reduce vibration in the engine room

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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

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

C) It adjusts the engine speed to manage temperature

D) It activates an external cooling fan

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Low Fuel Level Cut-Out

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

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

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

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8. Gearbox Temperature Sensor

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

C) To monitor the gearbox speed

A) To control the gearbox oil level

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

D) To ensure smooth gear changes

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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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9. Propeller Shaft Bearing Temperature Sensor

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

D) To adjust the propeller pitch automatically

A) To maintain the engine’s RPM

C) To monitor the bearing's rotational speed

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

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