SafetyCâu 695 / 700
On a 40 mph roadway you must shift traffic laterally by 10 feet with a merging taper. For speeds of 40 mph or less the taper length formula is L = W x S squared / 60 (L in feet, W = offset in feet, S = speed in mph). What is the MINIMUM taper length?
a.About 400 feet
b.About 500 feet
c.About 267 feet
d.About 133 feet
Giải thích
Correct: for 40 mph or less use L = W x S^2 / 60 = 10 x (40 x 40) / 60 = 10 x 1,600 / 60 = 16,000 / 60 = about 267 feet. Using the high-speed formula L = W x S (400 feet) is wrong here because 40 mph is not in the 45-mph-and-above range. 500 feet and 133 feet do not result from either correct formula with these numbers.
Trích dẫn luật: CA MUTCD Part 6Luyện miễn phí toàn bộ 700 câu hỏi — không cần đăng ký.
Câu hỏi liên quan cùng chủ đề
- In a permit-required confined space, normal air is about 20.9 percent oxygen. Which oxygen readings define an atmosphere that is unsafe to enter without correction?
- On a jobsite, how should portable fire extinguishers for ordinary combustibles (Class A) be positioned so workers can reach one quickly?
- How should flammable liquids like gasoline and solvents be stored on a construction site?
- In a taper on a 45 mph roadway, a common rule of thumb for the maximum spacing between channelizing devices (cones) in the taper is that the spacing in feet should be about equal to the speed in mph. Roughly what maximum cone spacing does that give?
- A temporary traffic control (TTC) zone is typically divided into four areas. Which sequence correctly lists them in the order a driver encounters them?
- A flagger controls traffic in a work zone. Which combination BEST matches California MUTCD flagging requirements?
Cập nhật gần nhất: · quy trình kiểm tra
Đội Ngũ Biên Tập PrepPass · Đối chiếu với California CSLB General Building (B) Trade Examination · Quy trình kiểm tra