Which risk was primarily managed in early Chinese gunpowder arrows by controlling grain size?

💡 Explanation

Premature ignition was a key concern; controlling black powder grain size optimizes the deflagration rate; faster than loose powder but slower than modern because a finer grain provides more surface area for consistent, controlled burning; thus, prevents accidental detonation, rather than uncontrolled trajectories.

• During a protracted siege, which outcome becomes very likely when miners undermine a castle wall using shoring beam removal?
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• Which mechanical consequence results when repeatedly impacting ancient castle walls with siege engines?
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• Which risk increases for Byzantine artisans when re-twisting low-quality silk filament during imperial textile manufacture?