System PartsCâu 13 / 60
What does the brake pedal (foot valve) do in an air brake system?
a.It pumps air into the storage tanks
b.It drains water from the reservoirs
c.It controls how much air is sent to apply the brakes
d.It engages the parking brake springs
Giải thích
Pressing down on the brake pedal, also called the foot valve or treadle valve, sends air to apply the service brakes. Pressing harder applies more air pressure and more braking. Letting up on the pedal reduces the air pressure and releases the brakes.
Luyện miễn phí toàn bộ 60 câu hỏi — không cần đăng ký.
Câu hỏi liên quan cùng chủ đề
- In a dual air brake system, before driving you should let air pressure build to at least what level in both systems?
- What is the purpose of the supply pressure gauge in the cab?
- What does the application pressure gauge show?
- 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?
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