Coupling & Uncoupling第 23 / 60 题
Why must you supply air to the trailer and check for air leaks before moving after coupling?
a.To cool the engine
b.To inflate the tires
c.To confirm the trailer brakes work and the air system holds pressure before driving
d.To lower the landing gear
解析
After connecting the air lines you must supply air to the trailer and check that the system holds pressure and the trailer brakes operate. Listening for leaks and watching the gauge confirms the braking system is sealed. Driving with a leaking or unconnected trailer air line can leave you without trailer brakes.
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同考点相关题目
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