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