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I need help with my MOTOR VEHICLE AIR CONDITIONING [hmvac] exam?

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When recovering refrigerant from a system that experienced a compressor burnout the technician should watch for signs of contamination in the oil because:?

A) Contaminants cannot be removed from the refrigerant and the refrigerant will have to be destroyed by the reclamation center.

B) The system will have to be flushed if contaminants are present.

C) The contaminants will eat away at the recovery equipment.

D) The contaminants will plug up the recovery equipment.

I take the exam wednesday. Please help me find the answer. http://www.epatest.com/609/manual/manual.jsp#r12

http://www.lewellyn.com/pdf/LewellynPM.pdf

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