Which risk increased along Hadrian's Wall when the mortar degraded?

💡 Explanation

Reduced bond strength of the lime mortar increases collapse risk because the key mechanism securing the wall shifts from distributed compression to localized shear stress. Therefore, collapse probability rises, rather than salt issues or undermining.

• Which outcome occurred during 18th-century ship construction due to incomplete seasoning of timbers?
• During freeze-thaw cycles, which consequence threatens pietra dura mosaics in Mughal monuments?
• Which navigational error increases when a 18th-century sailing ship experiences significant compass deviation?
• Which inaccuracy arose when early astrolabes were heated?
• Which outcome accompanied gunpowder refinement during Song Dynasty China?
• During the Han dynasty, what occurs when iron crossbow triggers suffer repeated stress?