MDE 7 Q5

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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?

B) Immediately replace the pressure sensor and restart the test

C) Verify the calibration of the pressure calibrator and retest

A) Increase the pressure further until the engine stalls

D) Manually shut down the engine and report the fault

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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?

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

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

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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?

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

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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?

A) To increase the lubricating oil viscosity

C) To confirm that the pressure alarm and shutdown system are functioning correctly after being reset

B) To ensure the engine continues running without alarms

D) To decrease the engine's operating temperature

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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

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

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

D) Completely drain the lubricating oil from the engine

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