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The chapter discusses the various forms of resistance encountered by machines on project sites, including rolling and grade resistance, and how to calculate the total resistance to determine the necessary tractive effort and power requirements of machinery. It emphasizes the importance of using correct power ratings provided by manufacturers and understanding project conditions such as slope and traction to estimate usable power effectively for operational efficiency.
Chapter 2314 sections
The chapter discusses the various forms of resistance encountered by machines on project sites, including rolling and grade resistance, and how to calculate the total resistance to determine the necessary tractive effort and power requirements of machinery. It emphasizes the importance of using correct power ratings provided by manufacturers and understanding project conditions such as slope and traction to estimate usable power effectively for operational efficiency.
Rolling resistance depends on the weight of the machine and is used to calculate total resistance.
Grade resistance varies with the slope percentage, affecting the tractive effort required for machinery.
Usable power is derived from the total power available from the machine after accounting for various resistances.
The resistance that opposes the motion of a machine due to its weight, expressed in kg per ton.
The additional resistance faced by machinery moving up or down slopes, with its value depending on the slope percentage.
The effective power available for performing work after accounting for resistance forces in a project site.
The force required to move equipment against resistance, which varies based on machine weight and type of slope.
Total Questions
2
Estimated Time
4 min
Passing Score
70%
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