The Make-Up Valve and the Unloading Valve Configuration are what?

The Make-Up Valve and the Unloading Valve Configuration are what?

• A. Same
• B. Different
• C. Unrelated
• D. Complementary

Answer: (A)

Make-Up and Unloading operate using the same valve arrangement in this system. The reason they’re described as the same is that the physical valve, its ports, and the way it’s actuated are identical, and the only difference is how the control signals are applied to drive it in makeup versus unloading. In normal operation, the makeup path feeds air into the system to hold pressure at the desired level, while the unloading path vents air to reduce pressure when unloading is commanded. Since the hardware and the control sequencing are the same, the configuration is effectively the same for both functions, which also makes parts interchangeable and maintenance simpler.

Make-Up and Unloading operate using the same valve arrangement in this system. The reason they’re described as the same is that the physical valve, its ports, and the way it’s actuated are identical, and the only difference is how the control signals are applied to drive it in makeup versus unloading. In normal operation, the makeup path feeds air into the system to hold pressure at the desired level, while the unloading path vents air to reduce pressure when unloading is commanded. Since the hardware and the control sequencing are the same, the configuration is effectively the same for both functions, which also makes parts interchangeable and maintenance simpler.