单选题To correct the condition of slugging and flooding back in a refrigeration system, it may be necessary to （）.Are-adjust the discharge pressureBclean the expansion valve screenCadd refrigerantDadjust the expansion valve
单选题
To correct the condition of slugging and flooding back in a refrigeration system, it may be necessary to （）.
A
re-adjust the discharge pressure
B
clean the expansion valve screen
C
add refrigerant
D
adjust the expansion valve
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