Vacuum pumps can be used to

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Multiple Choice

Vacuum pumps can be used to

Explanation:
Vacuum pumps create a low-pressure environment inside the system to remove air and non-condensable gases, along with moisture. This is crucial before charging refrigerant because air and non-condensables raise pressure and reduce charging accuracy, while moisture can form acids or freeze into ice that blocks components. Evacuating to a deep vacuum (typically 500 microns or lower) helps ensure the system is clean and ready for proper refrigerant charge. A vacuum pump isn’t used to detect leaks, to pressurize the system, or to cool refrigerant—those tasks are handled by other tools or methods.

Vacuum pumps create a low-pressure environment inside the system to remove air and non-condensable gases, along with moisture. This is crucial before charging refrigerant because air and non-condensables raise pressure and reduce charging accuracy, while moisture can form acids or freeze into ice that blocks components. Evacuating to a deep vacuum (typically 500 microns or lower) helps ensure the system is clean and ready for proper refrigerant charge. A vacuum pump isn’t used to detect leaks, to pressurize the system, or to cool refrigerant—those tasks are handled by other tools or methods.

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