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