Choose the correct answer. Make a reference to the source of information you used to select the correct answer. (e.g.TRH

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Choose The Correct Answer Make A Reference To The Source Of Information You Used To Select The Correct Answer E G Trh 1 (122.92 KiB) Viewed 33 times

Choose the correct answer. Make a reference to the source of information you used to select the correct answer. (e.g.TRH4, Table 16, study guide section 8.2 etc) Note: 1 mark for the selected correct answer and 1 mark for the source 2.1 The typical pavement distress associated with highly cemented base is: (a) Cracking (b) Faulting (c) Rutting (d) Pumping. 2.2 The terminal riding quality of an interurban freeway is: (a) 2.5 PSI (b) 2.0 PSI (c) 1.8 PSI (d) 1.5 PSI. 2.3 The TRH20 is the South African design standard used for which pavements type (a) Portland Cement Concrete pavements (b) Gravel road pavements, (c) Pavement rehabilitation, both asphalt and concrete (d) Costal road pavements. 2.4 The minimum CBR value of G6 gravel material is: (a) 7%, (b) 15%, (c) 25%, (d) 45 %. 2.5 What is the relative damage exponent for a pavement which is less sensitive to overloading such as "Shallow" pavement? (a) n = 3, (b) n = 4, (c) n = 1, (d) n = 6. 2.6 Which of the following is a specification for (a) Plasticity index of 5, (b) Minimum CBR of 25%, (c) Maximum aggregate size of 37.5 mm, (d) Answers in (a) and (c). ! A 2.7 Which of the following is relevant to prime coat? (a) Used to bond between a gravel base and an asphalt surface course, (b) Used to bond between a bitumen treated base and an asphalt surface course, (c) Used to reseal cracked surface course, (d) Used to increase CBR of selected subgrade material. 2.8 Design reliability of Road Category B is: (a) 100%, (b) 95%, (c) 90 %, (d) 80%. 2.9 Surface drainage of a roadway is essential to: (a) Prevent aquaplaning, (b) Reduce spray to improve visibility, (c) Prevent saturation of the upper layers of the road structure, (d) All of the above. 2.10 Minimum CBR value of G9 gravel material is: (a) 3 kN. (b) 7%, (c) 7 kg, (d) 3 m. 2.11 The concept of "material depth" denotes: (a) The sum of the pavement layer thickness, (b) The depth to the water table, (c) The depth below finished road level to which soil characteristics have a significant effect on pavement behaviour, (d) The combined depth of upper and lower selected subgrade.