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The chapter provides a comprehensive insight into the operational dynamics of bulldozers, particularly focusing on cycle time estimation, productivity assessment, and the impact of various operational factors such as haul distance, speed, and transmission types. It elaborates on how to use performance charts for speed determination and introduces several methods for estimating productivity, including the use of production curves and thumb rules. This foundation offers a vital understanding necessary for effective cost estimation in earthmoving operations.
Chapter 518 sections
The chapter provides a comprehensive insight into the operational dynamics of bulldozers, particularly focusing on cycle time estimation, productivity assessment, and the impact of various operational factors such as haul distance, speed, and transmission types. It elaborates on how to use performance charts for speed determination and introduces several methods for estimating productivity, including the use of production curves and thumb rules. This foundation offers a vital understanding necessary for effective cost estimation in earthmoving operations.
The cycle time of a bulldozer is comprised of push time, return time, and maneuver time.
Productivity can be estimated through several methods including performance charts, production curves, and thumb rules.
Job efficiency is a crucial factor that influences the effective operational time of bulldozers, impacting productivity and cost estimates.
The total time taken for completing one full operation cycle of a bulldozer, including push time, return time, and maneuver time.
The time required for a bulldozer to push material from the cutting point to the dumping location, which varies depending on haul distance.
The volume of material moved by the bulldozer over a defined time period, typically expressed in loose cubic meters per hour.
The percentage of time that the bulldozer is actively working compared to the total time allocated for the operation.
Types of gear change in the bulldozer, which affect the maneuver time and overall cycle time; can be manual or automatic.
Total Questions
2
Estimated Time
4 min
Passing Score
70%
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