How can you check hydraulic brakes? Question How can you check hydraulic brakes? Answers Pump the brake pedal three times then apply firm pressure to the pedal for five seconds. The brake pedal should not move. Pump the brake pedal three times then apply firm pressure to the pedal for five seconds. The brake pedal should move slowly toward the floor. Pump the brake pedal three times then apply firm pressure to the pedal for five seconds. The brake pedal should slowly rise. Explanation Check hydraulic brakes by pumping the brake pedal three times before applying firm pressure to the pedal for five seconds. The pedal should not move. If it does, there may be a leak or some other problem in the braking system. This questions appears in the following tests: Iowa Class B Knowledge Test Louisiana Tank Minnesota Class B Knowledge Test Missouri Passenger Oklahoma Class A Knowledge Test Tennessee Class B Knowledge Test Vermont Class A Knowledge Test Vermont Double