Which type of sampling is most appropriate if you want to study the relationship between traffic density and the concentrations of Pb, Cd, and Zn in roadside soils.   CHOICES: random-convenience sampling   random-quota sampling   systematic–convenience sampling   systematic–judgemental sampling

Q: Question: Discuss at least two FDTs (Field density tests) used in road construction projects in…

A: The relative density of soil that has been compacted using machinery is measured in a soil field…

Q: Problem 1. A driver is traveling a 55 mph on a 2.5% down hill. a. What is the PRT distance (i.e.,…

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Q: Pavement Condition Index (PCI) Survey is developed by US Army Corps of Engineers to quantify the…

A: The Pavement Condition Index  is a numerical indicator that rates the general surface condition of a…

Q: Determine the crash modification factor

A: Crash modification factor: - It is defined as a factor which is used to calculate the number of…

Q: a) As a pavement inspector, you are assigned to assess a pavement condition. Following photographs…

A: First images shows the fatigue cracking or Alligator cracking on flexible pavement. Second image…

Q: Describe briefly how does obtaining samples of soil groundwater and soil gas relate to diagnosing…

A: Any result of soil erosion contamination of soil or soil depletion is generated by the introduction…

Q: vehicle speeds were recorded (mph): 45, 50, 55, 62, 48, and 82. Determine the time mean speed and…

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Q: Q7. A 25 miles of gravel road require reshaping and leveling. You estimate that a motor grader will…

A: Graders are multipurpose machine used for finishing of surfaces. It is operated for:- Smoothing the…

Landfills

The landfill is a site used for the disposal of waste materials. The landfill is a solid waste facility that is often known as a dumping ground. The image below shows a landfill site in Hawaii. Landfilling is the most ancient and common method used for the disposal of waste. For the landfill, a deep trench is constructed in an isolated place away from the city. The trench for landfills is designed properly after analyzing the total population and the waste generation per capita. The waste is dumped into the trench and after every layer of waste, a layer of soil is spread on the top of it.