Which hose setup will usually give the fastest recovery?
Recovery techniques · EPA 608 Core. The correct answer, and the reasoning behind it.
Keeping refrigerants unmixed and what affects recovery speed.
The question
Which hose setup will usually give the fastest recovery?
- Short hoses with a large inside diameterCorrect answer
- Long hoses with a small inside diameter
- Long hoses with a large inside diameter
- Short hoses with valve-core depressors left in
Why “Short hoses with a large inside diameter” is correct
Hose length and diameter limit flow. Short hoses with a large inside diameter have the least restriction, so refrigerant moves to the recovery unit faster. Long, narrow hoses and restrictions such as valve cores slow the job.
Source: EPA: Test Topics
Why the other answers are wrong
- Long hoses with a small inside diameter — Long, narrow hoses add the most restriction.
- Long hoses with a large inside diameter — Extra length adds restriction even with a larger diameter.
- Short hoses with valve-core depressors left in — Valve cores and depressors are restrictions that slow recovery.
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