Core TradesCâu 176 / 700
A water-reducing admixture is added to a concrete mix PRIMARILY to:
a.Achieve the desired workability while using less water, preserving strength
b.Increase the water-to-cement ratio for easier finishing
c.Extend the curing time to 28 days
d.Replace the need for reinforcing steel
Giải thích
Water reducers let a mix reach the needed slump with less water, keeping the water-to-cement ratio low so strength is preserved. They lower, not raise, the water-to-cement ratio, do not set the curing period, and never substitute for structural reinforcement.
Trích dẫn luật: 2025 CA Building Code, Chapter 19 (Concrete)Luyện miễn phí toàn bộ 700 câu hỏi — không cần đăng ký.
Câu hỏi liên quan cùng chủ đề
- A concrete foundation wall is 8 ft tall, 40 ft long, and 8 inches thick. Approximately how many cubic yards of concrete are needed (no waste allowance)?
- Rebar chairs and bar supports are used during concrete placement PRIMARILY to:
- When selecting the maximum size of coarse aggregate for reinforced concrete, a common limit is that the aggregate should NOT exceed:
- In a dwelling, GFCI protection is generally required for 125-volt receptacles installed in which of the following locations?
- Under typical residential conditions, a 14 AWG copper conductor is generally protected at a MAXIMUM overcurrent device rating of:
- In a service panel, the main bonding jumper serves PRIMARILY to:
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