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The safety valve will open to allow excess air pressure to escape at a level no higher than:

A. 50 psi
B. 75 psi
C. 100 psi
D. 150 psi

Answer :

The safety valve on a pressure cooker will vent at pressure no higher than 3.4 atm, which corresponds to approximately 51.3 psi, indicating option b. 75 psi is the closest answer.

The question concerns the maximum pressure at which a safety valve on a pressure cooker will allow steam to escape. Given the provided reference information regarding pressure vessels, pressure, and safety valves, the answer is that a particular pressure cooker has a safety valve set to vent at 3.4 atm.

This means that the maximum pressure allowed before the valve opens is 3.4 atm, to prevent any potential hazard. The corresponding answer to the multiple-choice question would thus be: b. 75 psi, as 3.4 atm approximately equals 51.3 psi, and none of the other options are closer to that value (1 atm ≈ 14.7 psi).

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