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Which material is primarily used as an aggregate in asphalt paving?
✔✔A) Crushed stone
B) Sand
C) Gravel
D) Clay
What does the term "compaction" in asphalt paving refer to?
A) The process of mixing asphalt with aggregate
B) The reduction of air voids in the asphalt through rolling
✔✔C) The process of applying heat to the surface
D) The addition of binder to the asphalt
What is the role of the paver in the asphalt paving process?
A) To create a smooth and even surface by laying the asphalt mixture
✔✔B) To evenly spread and level the asphalt across the roadway
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,C) To compact the asphalt
D) To heat the asphalt mix
What is the typical thickness of an asphalt layer for standard roads?
A) 1-2 inches
B) 3-4 inches
✔✔C) 2-4 inches
D) 5-6 inches
What is the purpose of using a vibratory roller in the compaction process?
A) To provide surface finishing
✔✔B) To improve asphalt density and reduce air pockets through vibration
C) To cool the asphalt
D) To spread the asphalt mixture
What type of roller is most commonly used for compacting asphalt?
A) Steel drum roller
✔✔B) Pneumatic tire roller
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, C) Vibratory roller
D) Smooth drum roller
What is the correct range for the temperature of asphalt during placement?
A) 175-200°F
✔✔B) 250-325°F
C) 350-400°F
D) 400-450°F
What is the function of the binder in the asphalt mix?
✔✔A) To bind the aggregate together and provide flexibility
B) To reduce the asphalt's viscosity
C) To add strength to the surface
D) To improve drainage
What is the effect of over-compaction on asphalt?
A) It can cause the asphalt to become too brittle and crack
B) It can result in a smooth surface
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