A hydraulic shovel will be used to excavate sandy clay and load it into a 12 BCY dump truck. The shovel production at 100% efficiency is estimated to be 300 BCY/hour and job efficiency is 0.80. Truck travel time is estimated to be 8.0 minutes and truck fixed cycle time (excluding loading) is estimated to be 2.0 minutes. Equipment costs for the shovel and trucks are $40/h (shovel) and $20/h (truck). A. How many trucks are theoretically required to obtain maximum production? B. What is the expected production of the system in banked measure using this number of trucks? C. What is the expected unit loading and hauling costs in $/BCY?
A hydraulic shovel will be used to excavate sandy clay and load it into a 12 BCY dump truck. The shovel production at 100% efficiency is estimated to be 300 BCY/hour and job efficiency is 0.80. Truck travel time is estimated to be 8.0 minutes and truck fixed cycle time (excluding loading) is estimated to be 2.0 minutes. Equipment costs for the shovel and trucks are $40/h (shovel) and $20/h (truck). A. How many trucks are theoretically required to obtain maximum production? B. What is the expected production of the system in banked measure using this number of trucks? C. What is the expected unit loading and hauling costs in $/BCY?
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:7.
A hydraulic shovel will be used to excavate sandy clay and load it into a 12 BCY
dump truck. The shovel production at 100% efficiency is estimated to be 300
BCY/hour and job efficiency is 0.80. Truck travel time is estimated to be 8.0
minutes and truck fixed cycle time (excluding loading) is estimated to be 2.0
minutes. Equipment costs for the shovel and trucks are $40/h (shovel) and $20/h
(truck).
A. How many trucks are theoretically required to obtain maximum
production?
B. What is the expected production of the system in banked measure using
this number of trucks?
C. What is the expected unit loading and hauling costs in $/BCY?
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