12-18. What functions does a prime coat of bituminous material serve? 1. The  prime  coat  penetrates  the base course about 2 inches, fills most of the voids, and promotes  adhesion  between  the base  and  previous  bituminous applications 2. The  prime  coat  penetrates  the base course about 1/4 inch, fills most of the voids, promotes  adhesion  between  the base  and  bituminous applications  placed  on  top  of it,    and  waterproofs  the  base 3. The  prime  coat  waterproofs  the wearing  surface  and  controls dust  and  loose  aggregates 4. The  prime  coat  increases compaction  and  binds  the aggregates  and  fines  together 12–19. An underprimed area can be corrected  by  performing  which of  the  following  operations? 1. Applying  twice  the  amount of prime material 2. Applying a layer of sand, then  repriming  over  it 3. Applying  twice  the  thickness of asphalt over the underpriced  area 4. Applying  a  second  coating of the prime material 12–20. What is an indication that the base  course  is  overpriced? 1. A free film of prime material remains on the base after a 45–hour  curing  period 2. The area looks dry and dark after  a  24–hour  curing  period 3. A free film of prime material remains on the base after an 8–hour  curing  period 4. The area looks and feels damp after  a  12–hour  curing  period 12-21. A tack coat is an application of asphalt to an existing paved surface  that  provides  a  bond between  which  of  the  following surfaces? 1. The  subsurface  and  subgrade surface 2. The  finish  surface  and  the subgrade  surface 3. The  existing  surface  and  the asphalt  material  to  be  placed on it 4. The  subsurface  and  the  base surface  course 12–22. An area that has an excess of tack coat material can be corrected by taking which of the following actions? 1. Apply heat until the excess bitumen  drys 2. Spread clean, dry sand on the area 3. Skip over the area and pave it last 4. Dig up the area and replace the material Learning Objective: Recognize the types of asphalt pavement construction. 12-23. What  is  the  major  difference between  plant-mix  construction asphalt  and  mix–in–place construction   asphalt? 1. The type of asphalt and aggregate  used  in  plant-mix construction  is  much  heavier and stronger than that used in  mix–in–place  construction asphalt 2. Plant-mix  construction  asphalt requires  a  different  rolling technique 3. Plant-mix  construction  asphalt is prepared in a central mixing  plant 4. Plant-mix  construction  asphalt requires  a  different  curing time 90