Final answer:
Autoclaves used for sterilization operate at high pressure, typically 15 to 20 psi.
Step-by-step explanation:
An autoclave is a device used for sterilization, and it operates at high pressure. The pressure of an autoclave used for sterilization is typically 15 to 20 pounds per square inch (psi). The high pressure is necessary to achieve temperatures above the boiling point of water, which is essential for killing endospores and achieving complete sterilization.