Construction Engineering & Management - Vol 1 | Overview 72 by Abraham | Learn Smarter
K12 Students

Academics

AI-Powered learning for Grades 8–12, aligned with major Indian and international curricula.

Professionals

Professional Courses

Industry-relevant training in Business, Technology, and Design to help professionals and graduates upskill for real-world careers.

Games

Interactive Games

Fun, engaging games to boost memory, math fluency, typing speed, and English skills—perfect for learners of all ages.

Typing
Memory
Math
English Adventures
Knowledge
Overview 72

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.

Enroll to start learning

You’ve not yet enrolled in this course. Please enroll for free to listen to audio lessons, classroom podcasts and take practice test.

Sections

  • 1

    Rolling Resistance Calculation

    This section explains how to calculate rolling resistance and grade resistance for moving vehicles, emphasizing their significance in determining the required power for machines on varying slopes.

    Learning Practice

  • 1.1

    Conversion Of Vehicle Weight

    This section discusses the conversion of vehicle weight into tons, the calculation of rolling resistance, and the factors affecting tractive efforts needed for project site operations.

    Learning Practice

  • 1.2

    Calculation Of Total Rolling Resistance

    This section covers the calculation of total rolling resistance, factoring in vehicle weight and penetration resistance.

    Learning Practice

  • 1.3

    Penetration Resistance Calculation

    This section covers the calculation of penetration resistance in vehicles, including rolling resistance and grade resistance.

    Learning Practice

  • 1.4

    Total Resistance Calculation

    This section covers the calculations involved in determining total resistance for vehicles on haul routes, including rolling resistance and grade resistance.

    Learning Practice

  • 2

    Grade Resistance Discussion

    This section discusses grade resistance and its importance in determining the tractive effort required for machinery operating on slopes.

    Learning Practice

  • 2.1

    Grade Resistance And Assistance

    This section explains how to calculate rolling resistance and grade resistance in vehicles, along with the concept of grade assistance when moving downhill.

    Learning Practice

  • 2.2

    Calculating Grade Resistance

    This section explains how to calculate rolling and grade resistance for vehicles, helping to determine power requirements for effective machine operation.

    Learning Practice

  • 3

    Power Requirement Estimation

    This section discusses the estimation of power requirements for vehicles, focusing on rolling resistance, penetration resistance, and grade resistance.

    Learning Practice

  • 3.1

    Determining Available Power

    This section explains how to calculate the available power needed for heavy machinery to overcome various resistance forces during operation.

    Learning Practice

  • 3.2

    Usable Power Calculation

    This section outlines how to calculate usable power for machinery by analyzing resistances such as rolling and grade resistance.

    Learning Practice

  • 3.3

    Rimpull And Drawbar Pull

    This section discusses the concepts of rimpull and drawbar pull, highlighting how they relate to vehicle resistance and the requirements for selecting machinery based on resistance calculations.

    Learning Practice

  • 3.4

    Calculating Usable Force

    This section discusses calculating the usable force of machinery based on rolling and grade resistance, highlighting the importance of understanding these factors for selecting appropriate equipment.

    Learning Practice

  • 3.5

    Estimating Power Requirements With A Problem Example

    This section discusses how to calculate the power requirements of machinery based on rolling resistance and grade resistance.

    Learning Practice

References

9 b.pdf

Class Notes

Memorization

What we have learnt

  • Rolling resistance depends ...
  • Grade resistance varies wit...
  • Usable power is derived fro...

Final Test

Revision Tests