If the spring brakes are activated, you should never: Do you currently have commercial insurance? Commercial Insurance is mandatory for CDL drivers in Ohio Yes I have insurance. But please show me your best quotes. No, please help me find the best insurance. Question If the spring brakes are activated, you should never: Answers Push down the brake pedal. Open the hood. Release air from the air storage tanks. Open the door to the cab. Explanation Never apply the brake pedal if your spring breaks are activated. Brakes can be damaged if they are subject to both springs and air pressure. This questions appears in the following tests: Alabama Class B Knowledge Test Alabama Air Brakes Colorado Class B Knowledge Test Colorado Air Brakes Connecticut Air Brakes Delaware Air Brakes District Of Columbia Double Florida Class A Knowledge Test Florida Air Brakes Florida Air Brakes Georgia Class A Knowledge Test Illinois Class A Knowledge Test Illinois Air Brakes Indiana Air Brakes Kansas Air Brakes Maryland Class A Knowledge Test Maryland Air Brakes Massachusetts Air Brakes New Hampshire Class A Knowledge Test New Jersey Air Brakes New York Air Brakes North Carolina Class A Knowledge Test North Dakota Tank North Dakota Air Brakes South Dakota Air Brakes Wyoming Air Brakes