Which consequence results when materials weather in dry stone Inca bridges?

💡 Explanation

Arch keystone displacement occurs because freeze-thaw cycles cause differential stresses at joints, affecting arch integrity, a form of Mechanical Weathering. This weakens joints weakening the load capacity; therefore, keystone integrity is threatened rather than strengthened by consolidation.

• Which consequence resulted, during sieges, when inadequate seasoning of medieval trebuchet throwing arms occurred?
• Which effect limited large-scale replication of illuminated manuscripts, specifically the costly pigment 'ultramarine' in the Byzantine era?
• Which consequence faced pre-Columbian terrace farmers after deforestation?
• Which outcome occurs when iron is smelted using a bloomery furnace with insufficient air flow?
• Which outcome reliably occurred when early cast iron crossbow trigger mechanisms fractured?
• Which numerical recording error risk increased within the Inca bureaucracy when supplementing physical quipu ledgers with oral transmission confirmation?