Final answer:
The normal relief valve set pressure in a tank is 70 psig. The correct answer is b) 70 psig
Step-by-step explanation:
The normal relief valve set pressure in a tank can vary depending on the specific tank and its purpose. However, in this case, the answer choices provided are specific values. Out of the given options, the correct answer is b) 70 psig (pounds per square inch gauge).
The normal relief valve set pressure for a tank is not a one-size-fits-all number; it is determined by the specific design and safety requirements of the system it is part of. Relief valves are designed to open at a predetermined set pressure to prevent an over-pressurization condition that could lead to mechanical failure or explosion.
The pressure setting could vary widely based on the type of tank, the contents within, the operating conditions, and the applicable safety codes and standards. Therefore, without specific details about the tank system or the standards it must adhere to, one cannot accurately answer the question.
The set pressure should always be determined based on the equipment's design criteria and the guidance of engineers and safety professionals familiar with the particular system in question.