What is the pressure range for high-pressure air compressors (HPACs)?

The correct answer reveals that high-pressure air compressors (HPACs) typically operate within the range of 3500 to 4200 psi. This range is significant because it aligns with the operational requirements of various systems on naval vessels, particularly for maintaining necessary air pressure for different applications, such as starting engines or acting as a power source for specific pneumatic systems.

Operating at 3500 to 4200 psi allows these compressors to deliver enough pressure to perform effectively in environments where high pressure is vital. This includes supporting the compressed air needs for torpedoes, underwater lathes, and other machinery that requires this level of pressure to function correctly. The design and operation of HPACs are meant to ensure reliability and efficiency within this pressure range, ensuring optimal performance when called upon during various operational scenarios.

The other pressure ranges mentioned do not accurately reflect the capabilities and operational specifications of HPACs, which is why they are not considered valid answers. Understanding the right pressure range is crucial for ensuring proper maintenance and safe operation of these systems on naval vessels.