Ontario Z Endorsement Knowledge Exam (Air Brake) -01 1 / 20 Which vehicles have mostly DD3 Safety Actuators? Trucks Cars Bikes Buses 2 / 20 Maximum governor cut out is ____ PSI. 100 130 145 120 3 / 20 Where you can find the safety valve? Air Tank S Cam On the dashboard Brake chamber 4 / 20 On which part of the brake system 'Brake linings' are attached? Brake shoes Brake chambers Rotors S Cam 5 / 20 _________ brake system doesn't have pushrod. Wedge brakes Drum Brake None of these Hydraulic brakes 6 / 20 Who can repair the Automatic Slack Adjusters? Certified Technician Safety Manager Owner Operator Driver 7 / 20 The most common brake chamber size is ______. 20 36 30 24 8 / 20 When air pressure reaches _____ PSI to ____ PSI lower than the cut out pressure, governor must cut in. 30, 35 15, 25 22, 25 40, 60 9 / 20 What things you check while testing Air Brake chambers? Holes Slack adjustment Cracks All of the above 10 / 20 What is the function of the governor in air brake system? remove the moisture apply the brakes keep the engine cool regulate air pressure 11 / 20 What is a caging bolt used for? To give more power to the brake chamber To protect the air lines To adjust the brakes To disable the brake chamber 12 / 20 What do you check while inspecting brake drums? Date of expiry Moisture Crakes and Holes Rust 13 / 20 Which type of brake system has "S" Cam? None Drum brakes Disc brakes All brakes systems 14 / 20 ______ in the brake system causes brake linings contamination. Grease and oil Air None Water 15 / 20 When air pressure drop to ____ PSI, spring brakes will start to apply. 55 90 60 35 16 / 20 The brake pedal should be ______, while measuring the pushrod stroke. fully pressed any of these not pressed partially pressed 17 / 20 When uncoupling, trailer supply valve must be ______ None of these Pulled out Removed Pushed in 18 / 20 If your truck is equipped with manual slack adjusters, readjustment can be done by Truck driver Safety manager Certified Technician Anyone 19 / 20 What can different size chambers on same axle cause? Imbalanced braking No braking All of these low mpg 20 / 20 What is the use of the Spring Brakes? None To prevent from skidding To stop at the traffic light for parking and an emergency. Your score is 0% Restart quiz
