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