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?
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Not quite.
Incorrect. This range is too low to match the governor cutoff; 60-80 psi falls below both the 100 psi cut-in pressure (where the compressor resumes pumping) and the 120-140 psi cutoff range specified in the official air brake check, leaving inadequate reserve air pressure to safely operate the vehicle.
Incorrect. This is close to, but below, the correct tested cutoff range. 100 psi is roughly the governor's 'cut-in' pressure where the compressor resumes pumping, not the cut-out pressure where it stops.
Correct. The official air brake inspection procedure instructs the examinee to start the vehicle, inspect that the air gauge builds air pressure to governor cutoff, approximately 120-140 psi, and to identify the cutoff pressure for that specific vehicle.
Incorrect. This range is above the tested cutoff range and is instead close to the safety (relief) valve setting of about 150 psi, which is a different safeguard that only opens if pressure becomes excessive.