Learning  Objective:  Identify the properties of bituminous surfacing  materials. 6-20. What is/are the function(s) of the aggregates  in  a  asphalt  surface? 1. Transmits the load from the surface  to  the  subgrade 2. Absorbs the abrasive wear of  the  traffic 3. Provides a nonskid surface 4. All of the above 6-21. Which of the following factors is  required  to  support  the  bearing action on a bituminous wearing surface? 1. Larger aggregates placed in the mix design 2. Subgrade and base course must  have  adequate  thickness, strength, cohesion, and bearing capacity 3. Upgrade the amount of asphalt in the mix 4. Give the mix adequate curing time 6-22. Which of the following is a bituminous surfacing material? 1. Emulsion 2. Tar 3. Asphalt bitumen 4. Each of the above 6-23. A container of bituminous material labeled with the symbol AC indi- cates it contains which of the following   materials? 1. Asphalt cutback 2. Asphalt cement 3. Asphalt emulsion 4. Anionic-cationic asphalt 6-24. When  used  with  asphalt  cement, which of the following distillates allows for slow curing after application  to  a  roadway? 1. Naphtha 2. Kerosene 3. Fuel oil 4. Gasoline 6-25. Which of the following viscosity grades of an MC asphalt bitumen is  considered  the  most  fluid? 1. 30 to 60 2. 200 to 800 3. 800 to 1,000 4. 1,000 to 3,000 6-26. When  added  to  asphalt  cement, which of the following produces an  asphalt  emulsion? 1. Water only 2. Soap only 3. Water and soap 4. Kerosene 6-27. What road tar symbol designates a hot tar? 1. RT 1 2. RT 2 3. RT 5 4. RT 9 Learning  Objective:  Recognize the test for identifying bituminous  materials. 6-28. Field identification of bituminous materials found stockpiled in unmarked containers is necessary for  which  of  the  following reasons? 1. To determine the type and method of construction the material can be used for 2. To establish safe handling practices  for  the  material 3. To determine type and quality of equipment needed 4. All of the above 43