Answer :
Final answer:
The low air pressure indicating system on P-23 activates if the pressure drops below 80 PSI, indicating potential malfunctions or safety concerns in engineering applications.
Explanation:
The question regarding the low air pressure indicating system on P-23 refers to a safety feature essential in various engineering applications, particularly those involving pneumatics or other systems where air pressure is a crucial operating parameter. The correct answer to when the low air pressure indicating system activates, if it drops below what PSI, is 80 PSI.
Air pressure systems are designed to operate within specific pressure ranges to ensure both efficiency and safety. When the pressure falls below a certain threshold, like 80 PSI, it can indicate a potential malfunction or leakage, triggering the low pressure indicating system. This feature is crucial for preventing equipment damage and ensuring the safety of the operations.