Operation & Safety第 60 / 60 题
What is a proper way to test the trailer service brakes while stopped or moving slowly?
a.Slam the tractor foot brake to the floor
b.Move at about 5 mph and apply the trailer hand valve to confirm the trailer brakes engage
c.Set the parking brake and rev the engine
d.Drain the trailer air tank
解析
To test the trailer service brakes, move the vehicle slowly (about 5 mph) and apply the trailer hand valve. You should feel the brakes come on, which confirms the trailer brakes and their air connection are working. This should be done as part of your pre-trip checks, not used for normal stopping.
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