🔍 Key Concepts

• Automatic vs manual valve control – how the controller decides when to move the valve • Feedback from system parameters such as pressure, temperature, or level to the controller • What changes in the control loop when you switch from auto to manual

💭 Think About

• Ask yourself: in manual mode, what is the controller looking at when deciding whether to move the valve? Is it still reacting to the process, or only following the operator’s set position? • Consider what could happen to pressure, level, or flow if the valve stays at one fixed position while the system conditions keep changing. • Think about which options describe a change in the logic of control (how the valve responds) versus a change in where you physically operate or observe the valve.

✅ Before You Answer

• Identify which choices talk about the response to system parameters (pressure/level/flow) and which talk only about location of operation or indication. • Check which option would most clearly explain why the operator’s continuous attention becomes critical in manual mode. • Eliminate any choices that confuse local/remote operation with the actual control mode (auto vs manual).