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