Answer :
Final answer:
The pressure at which a safety valve is set to automatically reduce pressure depends on the exact usage or application of the device and the safety requirements associated. Example scenarios include the safety valve in a pressure cooker set at about 50 psi for domestic safety and in a scuba tank set at 3000 psi for use at great depths underwater.
Explanation:
The pressure at which a safety valve is set to automatically reduce pressure, as per your options, could be any of the mentioned pressures (a)100 psi, (b)150 psi, (c)200 psi, or (d) 250 psi. These values depend on the specific design criteria of the equipment or system where the valve is installed and the safety requirements associated with it.
For instance, consider the scenarios provided. In one instance, a pressure cooker with a safety valve is set to vent steam if the pressure exceeds 3.4 atm, which is roughly 50 psi. This is less than any of the options you provided but reflects the cookware industry design standards for domestic safety. Conversely, in the illustration of the scuba tank, the pressure reads 3000 psi which is immensely greater than any of the options aforementioned. This huge leap in pressure tolerance reflects a stringent requirement in scuba diving equipment to withstand great depths underwater.
Therefore, it is important to know the context or the specific application where the valve is being used to determine the correct pressure setting at which the safety valve is set to trigger.
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