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