5.2 - Utilizing Production Curves for Estimation
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Practice Questions
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Define cycle time in bulldozer operations.
💡 Hint: Think about the different components that make up this total time.
What is job efficiency?
💡 Hint: Consider how often machines work effectively versus downtime.
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Interactive Quizzes
Quick quizzes to reinforce your learning
What determines variable cycle time?
💡 Hint: Think about what conditions change during bulldozer operation.
True or false: Job efficiency is always 100%.
💡 Hint: Consider the time machines are actually running versus downtime.
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Challenge Problems
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A bulldozer has a blade capacity of 3 cubic meters and operates with a cycle time of 5 minutes under ideal conditions. Calculate its productivity. Then, if it operates at 75% job efficiency, what is its adjusted productivity?
💡 Hint: Don’t forget to factor in the job efficiency after finding the base productivity.
Using a production curve, you determine that a bulldozer can achieve 8 loose cubic meters per hour at a certain dozing distance. If a correction factor of 0.8 is to be applied due to adverse conditions at the project site, what will be the real productivity?
💡 Hint: Remember to multiply the ideal productivity by the correction factor to find the adjusted real productivity.
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