5.2 - Cycle Time for Scraper and Pusher
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Practice Questions
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Define the term 'Swell Factor'.
💡 Hint: Think about volume changes when excavating material.
What does cycle time include?
💡 Hint: Consider all the actions performed by the machinery during an operation.
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Interactive Quizzes
Quick quizzes to reinforce your learning
What is the purpose of the swell factor?
💡 Hint: Think about what happens when soil is excavated.
True or False: The swelling of soil increases by 10% when move from bank to loose form.
💡 Hint: Consider the effect of machinery versus natural properties.
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Challenge Problems
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A construction project has determined that their scraper can carry a heaped capacity of 20 m³ at a swell factor of 0.78. If loaded to 92%, what would be the bank volume and weight of the material, given the unit weight is 1700 kg/m³?
💡 Hint: Remember to convert first before calculating weight.
Given a scraper’s cycle time of 10 minutes, can you suggest a workable number of scrapers if the pusher cycle time is 3 minutes? What are the operational cost benefits as the number of scrapers increases?
💡 Hint: Consider the time and money dynamics with operations.
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