Concerning safety valves, what statement is true?

Correct Answer: Option A — Safety valves are designed to open wide when lifted by excessive pressure and only reseat when the pressure has dropped significantly.

Safety valves utilize a huddling chamber to create a pop action. Once the set pressure is exceeded, the valve opens fully to discharge high volumes. It remains open until pressure drops below the set point by a predetermined amount, known as blowdown, ensuring the valve reseats tightly without chattering.