What potential issue can arise from backing the truck against the paver?

Backing the truck against the paver can lead to leaving a bump in the pavement. When the truck backs up to the paver, if it is not aligned correctly or if the paver does not receive a steady, consistent flow of asphalt, it can cause an uneven distribution of material. This unevenness can lead to defects in the final pavement surface, such as bumps or irregularities. These issues not only affect the quality of the pavement but can also result in increased maintenance costs and potentially reduce the lifespan of the roadway.

The other potential issues from the options presented, such as improper asphalt mix, tire damage, or increased delivery time, may arise due to logistical or operational errors but are not the direct consequence of backing the truck against the paver in terms of pavement quality. The specific concern with leaving a bump in the pavement highlights the importance of precision and care in material transfer between delivery vehicles and paving equipment to ensure a smooth and even roadway surface.