Wrong move
Direct answer
The risky shortcut is charging the system just because the pump ran for a long time. A vacuum that stalls above 1000 microns can come from moisture, leaks, contaminated pump oil, restrictive hoses, leaking core tools, or pulling through poor connections.
How to use this answer
Read the answer once, then prove it by choosing an answer in a practice question before looking at the explanation. If the miss repeats, tag the domain as Evacuation and drill a smaller set before returning to mixed practice.
Prep path
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