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CM 2113 Exam 3 Chao Wang Study Guide
Typology: Exams
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True
False
Backfilling
Angle Blade
Slot dozing
Scraper configuration, vol- ume of material and job size
True
for visibility. The material weighs 108 pcf in the bank state. Job efficiency is assumed to be equivalent to a 50-min hour. What is the operator correction factor?
for each scraper is 7.5 min. Following the previous question, what is the expected production rate of this scraper fleet if only one pusher is available?
422 cy/hr
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 ex- cavator 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?
Surface and weather con- ditions
True
305 BCY/hr
tance from the center of rotation of the crane to the hoist line of the crane when lifting a load of 9,000 lb will be 40 ft. Use Table 17.2 crane data to select the minimum length boom required to safely hoist the load.