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