Which limitation resulted from early cast iron crossbow trigger mechanisms?

💡 Explanation

Early cast iron, particularly given less refined production, resulted in brittle fracture failures along crystal boundaries due to crack propagation from stress concentration induced by high tension; therefore crossbows suffered trigger failures, rather than optimal flexibility of components.

• Which outcome accelerated soil salinization when Roman farmers employed irrigation?
• Which mechanism causes weakening in Mughal pietra dura inlay when exposed to repeated freeze-thaw cycles?
• Which outcome increases because water accumulates beyond designed capacity in Inca agricultural terracing?
• Which computational limitation constrained early astrolabes from solving complex astronomical problems using algebraic methods?
• Which challenge arose using chinampas because dikes degraded?
• Which structural weakness limited the maximum scaling size of Roman ballistae for siege warfare?