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