SafetyCâu 574 / 700
Concrete trucks need a place to rinse out their chutes on site. What is the BEST practice to protect the environment?
a.Rinse chutes into the nearest storm drain
b.Use a designated, contained concrete washout area that keeps wash water out of drains and soil
c.Rinse onto bare soil at the edge of the lot
d.Let drivers rinse wherever is convenient
Giải thích
Concrete wash water is highly alkaline and must be contained in a designated washout with a liner or watertight container so it cannot reach storm drains, waterways, or unprotected ground. Option a discharges pollutants directly to surface water. Options c and d allow caustic runoff to contaminate soil and drains. A contained washout captures the material for proper disposal and keeps the site compliant.
Luyện miễn phí toàn bộ 700 câu hỏi — không cần đăng ký.
Câu hỏi liên quan cùng chủ đề
- A flagger controls traffic at a work zone on a city street. Which practice BEST follows California MUTCD flagging guidance?
- A temporary traffic control zone is being set up. What is the PRIMARY purpose of the advance warning area with signs placed before the work?
- A large earthwork site keeps tracking mud onto the public street. Which best management practice (BMP) BEST addresses this under the site's storm water plan?
- Drums of fuel and solvents are stored on a jobsite. What is the BEST practice to prevent spills from reaching soil or storm drains?
- Before demolishing interior finishes in a commercial building from the 1970s, what is the BEST first step regarding possible asbestos?
- Workers will sand and torch-cut steel coated with old lead-based paint. Under Cal/OSHA lead rules, what is the BEST early step to protect them?
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