Core TradesCâu 12 / 700
A rectangular slab measures 20 feet by 25 feet and is 5 inches thick. Approximately how many cubic yards of concrete does it require?
a.About 6.3 cubic yards
b.About 7.7 cubic yards
c.About 9.3 cubic yards
d.About 11.5 cubic yards
Giải thích
Area = 20 x 25 = 500 ft^2; thickness = 5/12 = 0.4167 ft; volume = 208.3 ft^3; divided by 27 = about 7.7 cubic yards. A 4-inch slab would give 6.3 and a 6-inch slab 9.3, so only the 5-inch case yields 7.7.
Trích dẫn luật: 2025 CA Building Code (CBC) Chapter 19 (Concrete)Luyện miễn phí toàn bộ 700 câu hỏi — không cần đăng ký.
Câu hỏi liên quan cùng chủ đề
- When placing concrete in cold weather, fresh concrete must generally be protected from freezing until it reaches a compressive strength of at least about:
- During hot-weather concreting, plastic shrinkage cracking is BEST prevented by:
- Six cylindrical concrete piers are each 18 inches in diameter and 4 feet deep. Approximately how many cubic yards of concrete are needed for all six?
- Mechanical vibration of freshly placed concrete is done PRIMARILY to:
- Final troweling or hard floating of a concrete slab should NOT begin until:
- For general-use receptacles along a dwelling wall, the spacing rule requires that no point measured horizontally along the wall line be more than what distance from a receptacle?
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