Safe DrivingCâu 30 / 120
You are traveling at 55 mph on dry pavement in a heavy vehicle. Roughly what total distance will you cover from the moment a hazard appears until you are stopped?
a.About 100 feet
b.About 300 feet, longer than a football field
c.About 60 feet
d.About 1,000 feet
Giải thích
At 55 mph perception is roughly 60 feet, reaction is roughly 60 feet, and braking adds about 170 feet or more, for a total of around 300 feet. One hundred feet or 60 feet would not even cover perception and reaction, and 1,000 feet overstates the distance on dry pavement.
Luyện miễn phí toàn bộ 120 câu hỏi — không cần đăng ký.
Câu hỏi liên quan cùng chủ đề
- Total stopping distance is made up of which three parts?
- If you double your speed from 20 mph to 40 mph, what happens to your braking distance?
- You are driving a 40-foot straight truck at 35 mph on a dry road. What is the minimum safe following distance?
- The same 40-foot vehicle is now traveling at 55 mph on dry pavement. What following distance should you keep?
- Rain has just begun after a long dry spell and the road surface is slick. How should you adjust your following distance and speed?
- You are approaching a curve posted at 40 mph while driving a loaded tractor-trailer. What is the safest approach?
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