How can one determine whether a pressure-reducing valve uses multiple stages for pressure re-duction?
a. By noting the number of gauges attached to the valve
b. By noting the DISS code
c. By noting the ASSS code
d. By noting the number of pressure relief vents
ANS: D
Because each pressure chamber has one safety relief vent, the user usually can determine the number of stages in a reducing valve by noting the number of relief vents present.
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