“I start by making sure there is no excessive air leakage.”

“This is done by releasing the Parking Brake and applying the Service Brake, which is held throughout the test.”

{apply service brake}

“After an initial loss of air and the gauges stabilize there can then be no more than three (3) psi loss in one minute.”

{wait for gauges to stabilize}

“The gauges have stabilized. Would you please time me?”

{after one minute or at the instruction of the examiner the test concludes}

“There was less than a three (3) psi loss.”

{release service brake}