Concerning safety valves, what statement is true?
Safety valves are designed to open wide when lifted by excessive pressure and only reseat when the pressure has dropped significantly.
Safety valves are always set to relieve at a pressure exceeding the maximum allowable working pressure of the system.
Safety valves are designed to throttle and adjust the flow rate to just keep up with the capacity of the pressure source.
Safety valves are designed to open wide when lifted by excessive pressure and immediately reseat when the pressure has dropped by a very small amount.
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