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Engine : Refrigeration AC - 74/610
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To test for a suspected large refrigerant leak from an R-22 refrigeration system in an enclosed area, how should this be done?
A) perform a hydrostatic test with water
B) apply a soap solution to fittings seen to have oil residue
C) perform a standing vacuum test
D) use an electronic leak detector to check all fittings for leaks
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