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