System Parts第 10 / 60 题
In a dual air brake system, before driving you should let air pressure build to at least what level in both systems?
a.50 psi
b.75 psi
c.90 psi
d.100 psi
解析
You should wait until the air pressure builds to at least 100 psi in both the primary and secondary systems before driving. Building to the normal operating range ensures the brakes have enough air to function. Driving with too little pressure is unsafe because braking capacity is reduced.
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同考点相关题目
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