During the official pre-trip Air Gauge and Governor Cutoff Check, the air pressure should build and the compressor should cut out within approximately what range?

nhcdm-s.pdf, Section 11M.1.2, Step 1 (Air Gauge and Governor Cutoff Check); 49 CFR 383.111(b)(5)(i)-(ii)

This specific numeric range is tested on the CDL skills exam's required air brake check, and failing to correctly identify or demonstrate it results in automatic failure of the vehicle inspection test, so drivers must know it precisely, not approximately.