Ontario Z Endorsement Knowledge Exam (Air Brake) -05 1 / 20 If pressure drops below ____ PSI, trailer supply valve will automatically close and stop the air supply to the trailer 90 50 60 45 2 / 20 Trailer service brakes can be operated by_____? Brake pedal Neither of these Hand valve Hand valve or Brake Pedal 3 / 20 While performing pushrod stroke measurement, _______. engine should be on trailer must be detached engine should be off truck must be moving 4 / 20 Which brakes do you apply to perform 'Tug Test' on trailer? Any Brakes Tractor brakes No brakes Spike Brakes 5 / 20 If the connection port is _______, you will require a long stroke brake chamber. Triangle Round Square Hexagonal 6 / 20 If air line has rubbing marks but there is no air leak then apply duct tape on it drive for one day note down in the log book and move replace it before moving 7 / 20 Trailer brake system first supplies air to _______ Depends upon the priority set by manufacturer Spring brakes Service brake To all the brakes equally 8 / 20 From where the air compressor takes power? Engine Battery Wheels Brakes 9 / 20 If the connection port is _______, this will be a short or regular stroke chamber. Triangle Hexagonal Round Square 10 / 20 Air pressure must go from 85 PSI to 100 PSI within 2 minutes, while engine running at ____RPM to ____ RPM. 500, 700 600, 900 1000, 1200 1200, 1500 11 / 20 What is the colour of the Service Line couplings? Yellow Green Blue Red 12 / 20 When pushrod exceeds the specified limit then brakes must be _____ Adjusted heated Lubricated Changed 13 / 20 Tractor protection valve stops the air supply of ______ when closed. All brakes Spring brakes Trailer service line Tractor brakes 14 / 20 The brake pedal should be ______, while measuring the pushrod stroke. fully pressed partially pressed any of these not pressed 15 / 20 Where are air brake chambers attached? On rear wheels only On each wheel On air tanks On front wheels only 16 / 20 The air, in the air brake system, first enters into the ______. Dry tank Supply tank Service tank Air compressor 17 / 20 To perform the air brake test, vehicle should be parked at ______ . downhill uphill in the garage level surface 18 / 20 How often the air tanks should be drained? Daily Monthly Never Weekly 19 / 20 When the air pressure goes on or below _____, low air pressure warning device must activate. 80 PSI 90 PSI 55 PSI 30 PSI 20 / 20 What will you do if Low Air Warning device is activated on the road? Keep driving at the same speed Pull out and stop immediately Inform the company after finishing the trip Keep moving slowly Your score is 0% Restart quiz
