Operation & SafetyCâu 51 / 60
On a vehicle with air brakes, when is the proper time to release the brakes during snub braking on a downgrade?
a.When your speed has been reduced to about 5 mph below your safe speed
b.Only when the vehicle comes to a complete stop
c.As soon as you touch the brake pedal
d.When the air pressure warning comes on
Giải thích
During snub braking, you apply the brakes to slow the vehicle and then release them when you have slowed to about 5 mph below your safe speed. This lets the brakes cool between applications. Continuous light braking, by contrast, keeps heat building and can lead to fade.
Luyện miễn phí toàn bộ 60 câu hỏi — không cần đăng ký.
Câu hỏi liên quan cùng chủ đề
- What is brake fade?
- What is the most important thing to do to control your speed on a long, steep downgrade?
- What is the proper braking technique (snub braking) on a long downgrade?
- Compared to a car, how does the stopping distance of a heavy vehicle with air brakes change as weight and speed increase?
- 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?
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Đội Ngũ Biên Tập PrepPass · Đối chiếu với CDL Air Brakes Knowledge Test · Quy trình kiểm tra