Suppose the diesel generator set drive...

Question 1 / 2066636eef28f7522a1c52031f

Question 1 of 2066636eef28f7522a1c52031f

Suppose the diesel generator set drive engines on your ocean-going tug are fitted with pressure- compensated governors as shown in the illustration. What is the significance of the oil inlet connection with this particular governor? Illustration MO-0219

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🔍 Key Concepts

• Pressure-compensated governor operation and what “pressure-compensated” actually refers to • Flow path from the oil inlet through the pump gears, relief valve, and internal passages in the Woodward PSG governor • Difference between using oil as a control/hydraulic medium versus using oil pressure as a speed or safety signal

💭 Think About

• Look at the color/texture legend in the illustration: what pressures and functions are associated with the oil that enters at the oil inlet and passes the pump gears? • Ask yourself whether the governor relies on changing engine lube oil pressure to detect speed, or whether it creates and regulates its own internal control pressure. • Consider what components in the drawing (pump gears, relief valve, buffer piston, power piston) actually move because of this oil and what that tells you about the oil’s role.

✅ Before You Answer

• Verify whether engine speed sensing in this governor is done mechanically (flyweights/speeder spring) or by varying oil pressure from the engine. • Check if there is any linkage from low lube oil pressure to a shutdown or alarm device in the drawing, or if those features are completely absent. • Confirm from the schematic that the incoming oil is distributed throughout the governor to lubricate moving parts and provide hydraulic force to pistons and plungers.

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Question 1 of 20

The governor uses variable engine lube oil pressure to sense engine speed.

The governor uses low engine lube oil pressure to execute a safety shutdown.

The governor uses low engine lube oil pressure to trigger an alarm.

The governor uses engine oil as a lubricant and a hydraulic power medium.

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Question 1 / 2066636eef28f7522a1c52031f

Question 1 of 2066636eef28f7522a1c52031f

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Question 1 of 20

66636eef28f7522a1c52031f

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💭 Think About

✅ Before You Answer

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