Core TradesCâu 175 / 700
When selecting the maximum size of coarse aggregate for reinforced concrete, a common limit is that the aggregate should NOT exceed:
a.Three-fourths of the minimum clear spacing between reinforcing bars
b.Twice the diameter of the largest reinforcing bar
c.The full depth of the slab
d.The thickness of the concrete cover multiplied by four
Giải thích
A standard rule limits maximum aggregate size to three-fourths of the minimum clear spacing between bars (and related limits for cover and member size) so concrete can flow around the steel without honeycombing. The other choices allow aggregate too large to consolidate properly around reinforcement.
Trích dẫn luật: 2025 CA Building Code, Chapter 19 (Concrete) per ACI 318Luyện miễn phí toàn bộ 700 câu hỏi — không cần đăng ký.
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