If the input signal at 'P4' is 51 psi, and...

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Question 1 of 205eccefa5bacbc34ba4d487e1

If the input signal at 'P4' is 51 psi, and the supply pressure is 50 psi, then the output pressure at 'P1', shown in the illustration will be __________. See illustration GS-0145.

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5eccefa5bacbc34ba4d487e1

If the input signal at 'P4' is 51 psi, and the supply pressure is 50 psi, then the output pressure at 'P1', shown in the illustration will be __________. See illustration GS-0145.

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🔍 Key Concepts

• Force balance on diaphragms: Force = Pressure × Area, and all diaphragms are 1 in² so pressure (psi) = force (lb). • Lever moment balance: Moments about the pivot use Force × Arm length (L₁ = 3.1 in, L₂ = 2.9 in). • Supply pressure limit: Output pressure at P1 cannot exceed the available supply pressure.

💭 Think About

• How do the forces created by P4 and the spring on diaphragm 4 balance the feedback forces transmitted through the lever from diaphragms 2 and 3? • When the system is in equilibrium, what must be true about the clockwise and counter‑clockwise moments around the pivot, given L₁ and L₂? • Given that all diaphragm areas are 1 in², how does that simplify the relationship between pressure at P4, the spring force, and the resulting pressure at P1?

✅ Before You Answer

• Be sure you convert pressure to force correctly using the 1 in² diaphragm area so that 1 psi = 1 lb of force on each diaphragm. • Check that your calculated output at P1 does not exceed the 50 psi supply pressure shown in the diagram. • Verify that the moment balance (Force × 3.1 in on one side vs. Force × 2.9 in on the other) is satisfied when you choose your answer.

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Question 1 of 205eccefa5bacbc34ba4d487e1

If the input signal at 'P4' is 51 psi, and the supply pressure is 50 psi, then the output pressure at 'P1', shown in the illustration will be __________. See illustration GS-0145.

Back

Question 1 of 20

5eccefa5bacbc34ba4d487e1

If the input signal at 'P4' is 51 psi, and the supply pressure is 50 psi, then the output pressure at 'P1', shown in the illustration will be __________. See illustration GS-0145.

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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