According to the illustration shown, which...

According to the illustration shown, which of the following statements is/are true? See illustration GS-0044.

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🔍 Key Concepts

• Identify whether this is a pressure-reducing or pressure-relief type valve, and how outlet pressure is sensed and fed back to the main valve. • Trace the small passages from outlet to ports C and J and see which side of the diaphragm/piston they act on (opening vs. closing the main valve). • Consider what an auxiliary valve (D) leaking would do to the control pressure above or below the main diaphragm/piston and how that would change the outlet pressure.

💭 Think About

• When port C is plugged, does outlet pressure still reach the sensing element? If not, will the main valve tend to open more or close more? How does that affect outlet pressure? • If port J is plugged, is pressure trapped somewhere in the control chamber? Would trapped pressure tend to force the main valve more open or more closed? What does that do to outlet pressure? • If auxiliary valve D leaks, which chamber (above or below the diaphragm/piston) will lose pressure or gain pressure? Will that make the main valve move toward a more open or more closed position?

✅ Before You Answer

• Verify which side of the main diaphragm/piston is connected to port C and which side is connected to port J. • Determine whether a blockage at C or J removes outlet-pressure feedback or prevents pressure from being released/relieved, and whether that naturally makes the valve over‑reduce or under‑reduce. • Confirm whether a leak at auxiliary valve D would tend to equalize pressures between two chambers or vent one chamber, and how that changes the force balance controlling the outlet pressure.

🔍 Key Concepts

💭 Think About

✅ Before You Answer