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ASSIGNMENT QUESTIONS - 14071_590
ASSIGNMENT QUESTIONS - 14071_592

Engineering Aid 2 - Intermediate Structural engineering guide book
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12-29. 12-30. 12-31. 12-32. 12-33. Which of the following bitumens would be the recommended surface for an airfield refueling point? 1. Road tar 2. Asphalt  cement 3. Asphalt  emulsion 4. Asphalt  cutback Which of the following bitumens has a very limited storage time and should not be exposed to freezing temperatures? 1. RTCB 2. Asphalt cement 3. Asphalt  emu1sion 4. RC  asphalt  cutback Learning  Objective:  Identify practices  and  procedures associated  with  field  and laboratory  identification  of unknown  bituminous  materials. What test do you perform to determine if a bitumen is an asphalt, an emulsion, or a tar? 1. Volubility 2. Smear 3. Pour 4. Penetration Asphalt  cement  can  be distinguished from asphalt cutback by means of the what test? 1. Field  penetration 2. Pour 3. Volubility 4. Stone  coating During the field test, a pencil point penetrates slowly a sample of  asphalt  cement  with  little difficulty.  What  is  the  grade of the asphalt cement? 1. 0-40 2. 40-85 3. 85-150 4. 150-300 12-34. 12-35. 12-36. 12-37. 12-38. What is the probable identity of an  asphalt  cutback  sample  that pours  like  molasses  and  was determined to be tacky as the result of the smear test? 1. RC-800 2. MC-800 3. SC-800 4. AC-800 What type of cutback is indicated when a sample gives off a strong odor of kerosene when heated? 1. Rapid  curing 2. Medium  curing 3. SlOW curing When you mix an emulsion with damp sand,  what  action  identifies  the emulsion  as  a  rapid-setting  type? 1. Readily  mixes  with  the  sand 2. Partially  coats  the  sand 3. Does not mix with the sand 4. A  solidifying  of  the  mixture will  occur What test is used to distinguish RTCB from RT-7? 1. Pour 2. Smear 3. Heat-odor 4. Solubility Laboratory  tests  serve  which  of the following purposes? 1. 2. 3. 4. They  establish  safe  handling procedures They  provide  positive identification  of  bituminous material They  establish  a  working  mix design Each of the above 85







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