3.2 - Estimating Using Thumb Rules
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Practice Questions
Test your understanding with targeted questions
What are the three components of cycle time for a bulldozer?
💡 Hint: Think about what each time refers to in bulldozer operation.
Define job efficiency.
💡 Hint: How long does the bulldozer work in an hour?
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Interactive Quizzes
Quick quizzes to reinforce your learning
What is included in cycle time?
💡 Hint: Think about what makes up the total time for an operation.
True or False: Maneuver time varies significantly depending on the dozing distance.
💡 Hint: Consider what factors keep maneuver time consistent.
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Challenge Problems
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A bulldozer pushing material moves at a speed of 1 meter per second, with a push time of 20 seconds. Given a backtrack time of 10 seconds and a maneuver time of 5 seconds, calculate the total cycle time and potential productivity for 25 minutes of operation.
💡 Hint: Break the problem into smaller steps for clarity.
Consider a case where a bulldozer operates on a slope and the cycle time increases by 20% due to terrain factors. If the original cycle time was 30 minutes, determine the new cycle time and discuss how that impacts productivity.
💡 Hint: Calculate the impact in terms of cycles per hour to find the productivity change.
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