Final answer:
The question asks about the psi used to inflate a life raft during a leakage test, which pertains to the study of pressure in physics. The exact psi is not provided and would typically be determined by the manufacturer's guidelines or regulatory standards.
Step-by-step explanation:
The question regarding the psi at which a 46 man life raft is inflated during a leakage test is related to the concept of pressure in physics, specifically within the realm of fluid mechanics. Leakage tests are crucial for ensuring the safety and functionality of life-saving equipment like life rafts.
When conducting a leakage test, the life raft will be inflated to a specific pressure that is deemed safe and strong enough to endure the conditions it might face at sea. This test ensures that the material of the raft and the valves used to inflate it do not have any leaks and can maintain their integrity under stress. The question does not provide an exact psi value for the life raft inflation, so one would need to refer to the manufacturer's guidelines or regulatory standards for the specific psi used in leakage tests for such life rafts.
Testing valves at different psi levels, such as those described in the example where Valve A and Valve B are tested at 4,500 psi, involves determining pressure tolerances and is crucial in selecting the correct components for any pressurized system, including life rafts.