When a purge-recovery unit runs to purge the air from the condenser of a low pressure chiller, most ...

When a purge-recovery unit runs to purge the air from the condenser of a low pressure chiller, most of the refrigerant that is purged with the air is
 
  A) released with the water. B) released into the air.
  C) reused as chiller fuel. D) recovered and returned to the system.

 Q. 2

Which of the following statements regarding chillers is true?
 
  A) Flooded chillers have less potential for freeze-ups than others chillers.
  B) Regional zone chillers are more cost effective than centralized units.
  C) Dry (direct expansion) chillers require less refrigerant than flooded chillers.
  D) Top-loaded chillers do not use the shell-and-tube arrangements.