If psi is green, what does this indicate regarding the elements?

• A. They must be replaced immediately
• B. They must be changed at the end of operation
• C. They are clean
• D. They are contaminated

Answer: (C)

Green psi means the element has passed cleanliness standards and is considered clean and ready for use. In practice, this status shows there’s no contamination and no immediate maintenance action required, so replacement or decontamination isn’t needed before the next operation. Other color cues would indicate contamination or different maintenance actions, which is why green corresponds to “clean.”