A completely full water storage tank is being hydrostatically tested to 200 psig using a positive displacement pump (PDP) with a smooth and constant discharge flow rate of 8 gpm.
The tank is protected by a relief valve and a safety valve; both valves discharge to the atmosphere.
Each valve has an opening setpoint of 205 psig and a maximum rated discharge flow rate of 6 gpm.
The PDP is inadvertently left running when tank pressure reaches 200 psig.
When conditions stabilize with the PDP still running, the relief valve will be __________ open; and the safety valve will be discharging a flow rate of approximately __________ to the atmosphere.
A. partially; 6 gpm
B. partially; 2 gpm
C. fully; 6 gpm
D. fully; 2 gpm
Show Answer
Answer: A
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