If safety significant parameters deviate too far, protective actions may be automatic trip or relief; sometimes both.

If safety significant parameters deviate too far, protective actions may be automatic trip or relief; sometimes both.

• A. Automatic trips
• B. Relief
• C. Automatic trips / relief
• D. No action

Answer: (C)

When safety significant parameters move beyond their safe limits, automatic protective actions are triggered to keep the plant in a safe state. These actions can include automatic trips, which shut down the process to stop heat generation, and relief, which opens relief devices to prevent overpressure. Depending on the situation and plant design, either action may occur, and sometimes both happen together: a trip may shut down the system while relief valves simultaneously limit pressure. Automatic trips alone might stop the process but not relieve pressure, while relief alone might protect piping without stopping potentially unsafe energy input. Therefore, the best choice is the option that includes both automatic trips and relief.

When safety significant parameters move beyond their safe limits, automatic protective actions are triggered to keep the plant in a safe state. These actions can include automatic trips, which shut down the process to stop heat generation, and relief, which opens relief devices to prevent overpressure. Depending on the situation and plant design, either action may occur, and sometimes both happen together: a trip may shut down the system while relief valves simultaneously limit pressure. Automatic trips alone might stop the process but not relieve pressure, while relief alone might protect piping without stopping potentially unsafe energy input. Therefore, the best choice is the option that includes both automatic trips and relief.