Most solenoid valves operate so that the upstream line pressure will:

Most solenoid valves operate so that the upstream line pressure will:

Most solenoid valves operate so that the upstream line pressure will:



a. Act to open the valve
b. Be less than downstream pressure
c. Be sensed by a transmitter
d. Act to close the valve
e. Must pass through a restriction or nozzle





Answer: D


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