What is the primary function of the hopper in the paving system, and what level should it be kept?

• A. It cools the asphalt; keep it empty.
• B. It stores and feeds asphalt to the paver; keep it between 25-75% full.
• C. It stores the crew's materials; keep full.
• D. It measures air temperature; keep at 100% full.

Answer: (B)

The main idea is how the hopper functions to supply asphalt to the paver and why keeping it within an optimal level matters. The hopper stores asphalt mix and feeds it into the paver’s conveyor or auger system, providing a steady, continuous flow that helps create a uniform mat. Keeping the hopper between about a quarter and three-quarters full gives a reliable buffer for varying truck dumps and asphalt temperatures while leaving room to absorb surge without pushing material back or spilling. If it’s too low, the paver starves and the surface quality suffers; if it’s too full, the feed can surge, causing spillage and potential instability in the screed. The other options aren’t accurate because the hopper isn’t used to cool asphalt, isn’t for storing crew materials, and doesn’t measure air temperature.