System PartsCâu 17 / 60
Why should you NOT use the parking brakes if the brakes are very hot, such as after coming down a steep hill?
a.The knob may be too hot to touch
b.It will drain the air tanks
c.Hot brakes can be damaged, and the drum could contract and crack
d.The parking brakes will not hold on a downgrade
Giải thích
If the brakes are very hot, applying and holding the parking brakes can damage them. On a very hot brake, the drum can contract as it cools around the applied shoes, which may crack the drum. Let the brakes cool before setting the parking brakes when possible.
Luyện miễn phí toàn bộ 60 câu hỏi — không cần đăng ký.
Câu hỏi liên quan cùng chủ đề
- What is the function of the brake chamber and pushrod?
- What is the purpose of the slack adjuster?
- What controls the parking brakes on a vehicle with air brakes?
- What is the trailer hand valve (trolley valve) used for?
- Why should the trailer hand valve NOT be used for parking?
- What is a one-way check valve used for in an air brake system?
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