Air Break Practice Test
Results
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#1. In British Columbia, when you test the system air-loss rate of a bus or straight truck, the maximum acceptable leakage rate is 4 psi within
In British Columbia, the maximum acceptable leakage rates per minute are 28 kPa (4 psi) for single vehicles (buses, straight trucks and bobtail tractors) and tractor-trailers with one trailer, and 41 kPa (6 psi) for tractor-trailers with two trailers. If the leakage rate is higher, check for leaks and correct them.