Question Air tanks usually hold enough compressed air: Answers For one stop before needing to be refilled. For several stops before needing to be refilled. For a day’s worth of braking. For an unlimited number of stops. Explanation In an air braking system, the air storage tanks can usually hold enough compressed air for the brakes to be used several times. Take a FREE Practice Test Now This questions appears in the following tests: Connecticut Knowledge Test Class B , Massachusetts Knowledge Test Class B ,