Operation & SafetyCâu 56 / 60
Why should you not fan (pump) the brakes on and off on a long downgrade with standard air brakes?
a.It makes the brakes too cold
b.It can use up the air supply faster than the compressor can replace it, reducing braking
c.It automatically applies the spring brakes
d.It speeds up the vehicle
Giải thích
Repeatedly pumping the brakes on and off can use air faster than the compressor can rebuild it, lowering tank pressure. If pressure drops too far, braking is reduced and the spring brakes may apply. Proper technique is to use a low gear and steady snub braking instead.
Luyện miễn phí toàn bộ 60 câu hỏi — không cần đăng ký.
Câu hỏi liên quan cùng chủ đề
- If your air brakes fail and pressure drops, what safety feature will eventually stop the vehicle?
- What should you do first if the low air pressure warning comes on while driving?
- When stopping normally with a vehicle equipped with air brakes, how should you apply the brakes?
- What is the effect of anti-lock braking systems (ABS) on air brake vehicles?
- To make sure you can stop in time, how should you adjust following distance with air brakes at higher speeds?
- Before starting down a long grade, when should you select the proper gear?
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