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Assignment 12, Continued - 14081_643
Assignment 12, Continued - 14081_645

Equipment Operator Basic - Beginning construction equipment operators manual
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12–34. Which of the following types of surface cracks is caused by a lack of  bond  between  the  surface  layer and  the  course  beneath? 1. Alligator 2. Edge 3. Reflection 4. Slippage 12–35. What type of surface defect results  from  either  compaction or a movement of the subgrade soil that weakens the subgrade? 1. Cracking 2. Distortion 3. Disintegration 4. Melting 12-36. What type of surface defect results  from  the  localized upward  displacement  of  the pavement  caused  by  swelling of  the  subgrade? 1. Channeling 2. Corrugation 3. Depression 4. Upheaval 12–37. Which  of  the  following  types of  surface  defects  is  usually the result of a rich plant mix or a prime or tack coat that was placed too heavy? 1. Polished  aggregates 2. Raveling  aggregates 3. Bleeding  aggregates 4. Rolling  aggregates 12-38. Repairs  performed  on  flexible pavements  must  start  at  the  source of the failure. 1. True 2. False 12–39. When you are performing pavement- cutting  operations  for  patchwork, the cut should extend to at least what depth in the good pavement? 1. 1 foot 2. 2 foot 3. 3 foot 4. 4 foot 12–40. When placing a hot mix in a patch, you should overfill the area by approximately  what  percentage  over the  required  pavement  thickness? 1. 10% 2. 20% 3. 30% 4. 40% Learning  Objective: Recognize  the principles  of  surface  treatment. 12–41. Of  the  following  improvements, which is gained by applying a surface  treatment? 1. It  waterproofs  the  surface 2. It provides a wearing surface 3. It  prevents  hydroplaning 4. All of the above 12–42. What is the liquid asphalt rate of application  (ROA)  when  performing dust–laying   operations? 1. 0.1 to 0.5 per square yard 2. 0.1 to 0.5 per square feet 3. 0.1 to 0.5 per cubic feet 4. 0.1 to 0.5 per cubic yards 12–43. When  performing  single-surface treatment  operations,  you  should push the aggregate into the bituminous  material  using  what type  of  roller? 1. A towed grid 2. A  vibratory  steel  drum 3. A  pneumatic–tired 4. A  vibratory  sheepsfoot 92







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