Vehicle InspectionCâu 5 / 120
You are running the air-brake check with a fully charged system, engine off, and the service brakes released. What is the maximum allowable air pressure loss per minute for a combination vehicle?
a.2 psi per minute
b.3 psi per minute
c.4 psi per minute
d.6 psi per minute
Giải thích
With brakes released, a combination vehicle may lose no more than 3 psi per minute; a single vehicle is limited to 2 psi per minute. With the brakes applied the limits rise to 3 psi for a single vehicle and 4 psi for a combination, and 6 psi per minute always indicates an unsafe leak.
Luyện miễn phí toàn bộ 120 câu hỏi — không cần đăng ký.
Câu hỏi liên quan cùng chủ đề
- What is the minimum legal tread depth in a major groove of a front steering-axle tire on a commercial motor vehicle?
- During your walkaround you measure 3/32 inch of tread on a drive-axle tire and 5/32 inch on a steer tire. What is the correct conclusion?
- At what air pressure must the low-air-pressure warning device on an air-brake vehicle come on?
- With the engine off and the air system fully charged, you begin fanning off air pressure with the brake pedal. At roughly what pressure should the tractor protection valve and parking brake valve pop out?
- Which sequence correctly describes the seven-step inspection method?
- You finish a run in a property-carrying truck and discover the right rear turn signal stopped working during the trip. What must you do at the end of the day?
Cập nhật gần nhất: · quy trình kiểm tra
Đội Ngũ Biên Tập PrepPass · Đối chiếu với Commercial Driver's License (CDL) General Knowledge Test · Quy trình kiểm tra