643. Concerning the arrangement of equipment and associated hoses shown in the illustration, what statement is true

When recovering refrigerant from the centrifugal chiller using this method, it is permissible to exceed 90% of the weight capacity of the refrigerant drum.
When recovering refrigerant from the centrifugal chiller using this method, it is possible to achieve the recovery levels required by law without any further recovery.
When recovering refrigerant from the centrifugal chiller using this method, the vent hose connection should be closed.
When recovering refrigerant from the centrifugal chiller using this method, it minimizes the risk of chiller tube freeze-up.

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