MDE 7 End of Unit Quiz

MDE 7 End Of Unit Quiz

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Question 3: What component of the centrifugal overspeed trip mechanism is responsible for detecting excessive engine speed?

B) The centrifugal governor

D) The crankshaft position sensor

C) The fuel injection pump

A) The temperature sensor

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Oil Pressure Cut-Out

Question 2: How does an oil pressure cut-out function in a diesel engine?

A) Allows the engine to run regardless of oil pressure

D) Increases engine speed to manage oil pressure

C) Monitors oil pressure and stops the engine when pressure is too low

B) Activates an external pump to boost oil pressure

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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

C) To ensure the gearbox remains properly lubricated

A) To prevent the engine from running too cold

D) To monitor the fuel temperature

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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

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

D) Bypass the high-temperature sensor

A) Increase the engine load to maximum capacity

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5. Oil Mist Detector

Question: What is the reason for fitting an oil mist detector in a propulsion engine’s crankcase?

C) To measure the viscosity of the engine oil

B) To detect the presence of oil mist that could indicate a crankcase explosion risk

A) To monitor the oil level

D) To ensure the oil is properly filtered

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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

B) To monitor the engine temperature

D) To measure the engine’s 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

D) Adjust the engine speed to match the set points

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

C) Increase the lubricating oil pressure to the maximum allowed value

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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?

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

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

C) By lowering the HT cooling water temperature to below the set point

A) By disconnecting the shutdown system and running the generator

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

A) To prevent fuel contamination

D) To adjust the fuel injection timing

B) To automatically refuel the engine

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

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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?

C) Gradually decrease the applied pressure using the pressure calibrator while monitoring the alarm system

A) Increase the engine speed to maximum RPM

D) Completely drain the lubricating oil from the engine

B) Disconnect the lubricating oil pressure sensor from the control system

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

B) High-temperature trip

C) Low coolant level sensor

D) High exhaust temperature trip

A) Oil pressure cut-out

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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?

D) To maintain proper engine speed

B) To ensure the engine does not overheat

A) To alert the crew of excessive fuel consumption

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

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