Refer to the drawing of two identical water storage tanks ___

Refer to the drawing of two identical water storage tanks (see figure below).

Two Identical Water Storage Tanks - PG-8

Tank A is protected by a relief valve and Tank B is protected by a safety valve.

Each valve has an opening setpoint of 205 psig and a maximum rated discharge flow rate of 8 gpm.

The tanks are being hydrostatically tested to 200 psig.

Each tank is being supplied with a smooth and constant flow rate of 2 gpm from separate positive displacement pumps (PDPs).

Both PDPs are inadvertently left running when tank pressures reach 200 psig.

With the PDPs running continuously, what will be the resulting status of the relief and safety valves?

Status - PG-8

Show Answer

Answer: B

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