The butterfly valve over speed device, shown...

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Question 1 of 205eccefa1bacbc34ba4d47744

The butterfly valve over speed device, shown in the illustration, is designed to close should the engine over speed, resulting in __________. See illustration MO-0103.

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Question 1 of 20

5eccefa1bacbc34ba4d47744

The butterfly valve over speed device, shown in the illustration, is designed to close should the engine over speed, resulting in __________. See illustration MO-0103.

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🔍 Key Concepts

• Butterfly valve overspeed trip purpose: to stop the engine by removing air, not fuel • How oil (or control) pressure and spring force oppose each other in the cylinder to move the piston rod • The direction of motion shown by the arrows on the piston rod and butterfly valve in the illustration (open vs closed)

💭 Think About

• When the engine overspeeds, what has to happen inside the cylinder to overcome the spring and move the piston toward the butterfly linkage? • Look at the label "Supply" on the right side of the drawing: if that supply increases when tripped, what changes first—spring compression or fluid pressure? • Follow the force path: whatever changes first must act on the piston, then on the linkage, then on the butterfly disc. Which option describes that initial change?

✅ Before You Answer

• Verify which side of the piston the spring is on and which side the supply pressure is on • Check which way the piston rod must move to rotate the butterfly toward the closed position in the drawing • Make sure the choice you pick describes the cause that makes the valve close, not the final effect you see at the butterfly valve itself

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Question 1 of 205eccefa1bacbc34ba4d47744

The butterfly valve over speed device, shown in the illustration, is designed to close should the engine over speed, resulting in __________. See illustration MO-0103.

Back

Question 1 of 20

5eccefa1bacbc34ba4d47744

The butterfly valve over speed device, shown in the illustration, is designed to close should the engine over speed, resulting in __________. See illustration MO-0103.

No comments yet

Be the first to share your thoughts!

If the question has a related picture, it will appear here.

🔍 Key Concepts

💭 Think About

✅ Before You Answer

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