Coupling & Uncoupling第 4 / 60 题
When connecting the glad hands, what must you check to avoid a dangerous coupling mistake?
a.That both hoses are the same color
b.That the hoses are as short as possible
c.That the tractor engine is running
d.That the emergency (red) and service (blue) lines are connected to the correct couplers, not crossed
解析
You must make sure the emergency and service air lines are connected to the correct glad hands and not crossed. Crossing the lines can leave the trailer with no emergency brake protection. Many rigs color-code red for emergency and blue for service to prevent mistakes.
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同考点相关题目
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