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1) A hydraulic shovel with a bottom-dump bucket with a heaped bucket volume of 10 m3 is...

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Civil Engineering

1) A hydraulic shovel with a bottom-dump bucket with a heapedbucket volume of 10 m3is excavating tough clay. The swing angle is 103degrees and the job efficiency is 0.85 + (8/100).Calculate the shovel production in BCM.

2) Estimate the time required to load 408m3 of gravel from a stockpile intotrucks using a clamshell having a heaped bucket capacity of 0.57m3. Estimated cycle time is 20s. Swing depth factor =1.0. Job efficiency is estimated to be 58min/h.

3) A small hydraulic excavator will be used to dig a trench inhard clay. The trench size is 0.76 m wide by 1.50 +(58/100) m deep. The excavator bucket available is 0.76 mwide and has a heaped capacity of 0.50 + (8/100)m3. The maximum digging depth of the excavatoris 4.90 m. The average swing angle is expected to be 75° and thejob efficiency is 78 %.  Estimate thehourly trench production in BCM and in linear meters of trench.

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