Which risk increased when Song dynasty iron production depended heavily on decentralized, small-scale bloomeries?

💡 Explanation

Variable strength occurred because inconsistent smelting in small bloomeries provided less quality control; a wide range in compositions resulted rather than uniform carbon content, therefore leading to randomly work-hardened spots and brittleness within armor and tools.

• Which property change resulted after cast iron production techniques improved during China's Song Dynasty?
• Which outcome arises when repeated rapid firing overheats a repeating crossbow's bronze arrow magazine in Han Dynasty?
• Which structural consequence occurs when a ziggurat's clay brick core experiences differential settling?
• Which outcome results from differential shrinkage during medieval cathedral vault construction?
• Which limitation constrained the productivity of Aztec chinampa agriculture systems, despite their innovative design?
• Which mechanism unintentionally reduced flow rate in some medieval qanat systems?