System PartsCâu 24 / 60
What is the main advantage of air brakes over hydraulic brakes on large vehicles?
a.They never need any inspection
b.Air is free and the system keeps working even with a small leak by using stored air
c.They eliminate the need for a parking brake
d.They make the vehicle stop instantly
Giải thích
Air brakes are a good way to stop large and heavy vehicles because air is readily available and the brakes use stored compressed air. A small leak will not immediately stop the brakes from working because the system keeps a supply of air. However, air brakes have more parts and take longer to react than hydraulic brakes.
Luyện miễn phí toàn bộ 60 câu hỏi — không cần đăng ký.
Câu hỏi liên quan cùng chủ đề
- 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?
- On many air brake vehicles, what is the purpose of the safety relief valve on the first air tank?
- Some air brake systems use an alcohol evaporator. What is its purpose?
- How are the service brakes applied in an air brake vehicle?
Cập nhật gần nhất: · quy trình kiểm tra
Đội Ngũ Biên Tập PrepPass · Đối chiếu với CDL Air Brakes Knowledge Test · Quy trình kiểm tra