Exam (elaborations)
BC Air Brake Practice Test 1 Questions and Answers
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BC Air Brake Practice Test 1
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BC Air Brake Practice Test 1-The main reservoir gauge reads? - Answer -Air pressure in the brake chambers
-On a long steep downgrade, the ideal method of using the brakes is? - Answer -Not
using the brakes
-If a small leak develops in a brake chamber, what type of valve will continue to hold the
same application pressure in the brake chamber? - Answer -Self-balancing
-If one set of brake shoes are poorly adjusted, what effect could it have on the
remaining set of brake shoes in the system? - Answer -They would increase their share
of the braking load, possibly causing overheating
-The final decision as to the condition of the brakes should be made by? - Answer -The
driver
-If the compressor discharge line is broken, what prevents total air loss? - Answer -The
one-way check valve
-When air pressure in the reservoir is at maximum, the compressor is? - Answer -
Governor Unloaded
-If 40 psi is exerted against a diaphragm of 30 square inches in area, what is the total
force that would be exerted? - Answer -1,200 lbs of force
-What is the main cause of brake fade at high temperatures? - Answer -The brake
drums expand away from the linings
-To stop a vehicle, the energy of motion is turned into? - Answer -Heat in the brake
lining and drums
-Signs posted in advance to a downgrade, instructing truck drivers to stop and check
brakes are? - Answer -Regulatory signs
-What is meant by the term braking distance? - Answer -The actual distance the vehicle
travels after the brakes are applied until the vehicle stops
-What causes moisture to form in the air brake system? - Answer -Air cools in the wet
tank
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