Core TradesCâu 1 / 700
A concrete mix is batched with 620 pounds of cement per cubic yard. To hold the water-cement (w/c) ratio at a MAXIMUM of 0.45, what is the greatest amount of water that may be used per cubic yard?
a.About 248 pounds
b.About 279 pounds
c.About 310 pounds
d.About 344 pounds
Giải thích
The w/c ratio is water weight divided by cement weight, so maximum water = 0.45 x 620 = 279 lb. 248 lb corresponds to a 0.40 ratio, 310 lb to 0.50, and 344 lb to 0.55, all of which miss the specified 0.45 limit.
Trích dẫn luật: 2025 CA Building Code (CBC) Chapter 19 (Concrete)Luyện miễn phí toàn bộ 700 câu hỏi — không cần đăng ký.
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