Engine : Refrigeration AC - 315/610
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| Before charging a refrigeration unit, unless quick disconnect fittings are used, the refrigerant charging hoses should be prepared in what way? |
| A) they should be cleaned with carbon tetrachloride |
| B) they should be purged with refrigerant |
| C) they should be flushed with clean refrigerant oil |
| D) they should be warmed in an oven |
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