A contractor has a project involving the construction of a s…

A contractor has a project involving the construction of a small manufacturing plant. The contractor has selected a borrow site and has decided to use 27-cubic yard dump trucks to haul the needed fill material. The contractor has decided to use a hydraulic excavator with a shovel attachment to load the trucks. The excavator has expected productivity as 422cy/hr at 100% efficiency, and the truck cycle time excluding loading is 0.48hr. The job site operation efficiency is assumed as 0.8. Please answer the next two questions. What is the expected fleet production if only 6 trucks are available to the fleet?

A contractor plans to excavate 4,000 bank cubic yards from a…

A contractor plans to excavate 4,000 bank cubic yards from a site. He needs to have 1,000 compacted cubic yards for the backfill of excavations. The soil test shows that the soil has a bank density of 2,500 pounds per cubic yard, a loose density of 2,000 pounds per cubic yard, and a compacted density of 3,000 pounds per cubic yard. He plans to use a truck that can haul 25 loose cubic yard per load. How many full truckloads of loose excess material should be hauled off the site?