4-24. What waste factor, if any, should be applied to a concrete estimate of 220 cubic yards? 1.   5% 2. 10% 3. 15% 4.  None 4-25. Determine the total number of sacks of cement required for a design project that uses a total volume of 180 cubic yard of concrete? (Use 6.5 sacks per cubic yard.) 1. 1,000 2. 1,170 3. 1,240 4. 1,287 Learning  Objective:  Identify methods and procedures used in the design  of  bituminous  mixtures. 4-26. The objective of bituminous mix design is to determine which of the following  factors? 1. The most durable mix possible 2. The most workable mix 3. The most economical blend that will meet all specified requirements 4. The most stable mix with the ability to withstand all possible traffic loads 4-27. The aggregate blend must achieve a specified gradation. Your trial batches are based on selected percentages from what source? 1. Project specifications 2. TM 5-337 3. NAVFAC MO-330 4. U. S. Army Corps of Engineers Pavement Design Manual 4-28. The specification limits for the gradation blend are established by what authority or publication? 1. By project specifications 2. By TM 5-337 3. By NAVFAC MO-330 4. U. S. Army Corps of Engineers 4-29. The final bitumen mix design is affected by all of the following variables except the 1. use of mix 2. minimum aggregate size 3. binder 4. loading 4-30. Which of the following data is required to prepare the test specimens? 1. Flow 2. Percentage of voids 3. Specific gravity of the aggregates 4. Total mix unit weight IN ANSWERING QUESTION 4-31, REFER TO TABLE 17-7 IN YOUR TEXTBOOK. 4-31 4-32 4-33 What flow rate is acceptable for a surface course that serves as a high-pressure tire pavement? 1.  16  or  less 2.  20  or  less 3.  2%  -  4% 4.  5%  -  7% When verifying the test results with the criteria for a particular property, you should use the OAC from  that  particular  test  only. 1. True 2. False The Marshall test method requires no special modification until the 1-inch plus aggregate exceeds what percentage of the total aggregate? 1. 5% 2. 7% 3. 10% 4. 12% 4-34. You have determined the optimum bitumen  content  to  be  5.5  percent. The aggregate will be what per- centage of the mix? 1. 100.0% 2. 97.8% 3. 94.5% 4. 89.0% 4-35. When you perform the tests for cold-mix asphalts, what is the maximum moisture content of the aggregate  by  weight? 1. 1% 2. 2% 3. 5% 4. 7% Learning   Objective:   Identify the general methods of soil stabilization. 21