Manitoba Airbrake Practice Exam 2025 – 400 Free Practice Questions to Pass the Exam

A pressure increase of 15 psi may not sound like much, but it is actually a significant change and requires sufficient time for the air pressure to build up. Option A, just 1 minute, may not be enough time for the pressure to increase by 15 psi. Option C, 3 minutes, may be too long and the pressure could exceed 100 psi. Option D, 4 minutes, also allows for too much time and may result in the pressure exceeding 100 psi. Therefore, option B, 2 minutes, is the most appropriate time frame for the air pressure to increase from 85 psi to 100 psi.