Time (hr) Average Flywheel Horsepower TΥΡΕ 621G Scraper 631G Scraper 23 330 19 462 657G Scraper 10 564 Consider the following costs: Fuel consumption rate 0.04 gallon /fwhp-hr $2.50/ gallon $1.47/ hr $2.13 hr $38.50/ hr $1.36/hr Fuel cost Oil, filters, etc. Tires Operator General Repairs

Time (hr) Average Flywheel Horsepower TΥΡΕ 621G Scraper 631G Scraper 23 330 19 462 657G Scraper 10 564 Consider the following costs: Fuel consumption rate 0.04 gallon /fwhp-hr $2.50/ gallon $1.47/ hr $2.13 hr $38.50/ hr $1.36/hr Fuel cost Oil, filters, etc. Tires Operator General Repairs

Solid Waste Engineering

3rd Edition

ISBN:9781305635203

Author:Worrell, William A.

Publisher:Worrell, William A.

Chapter5: Separation Processes

Section: Chapter Questions

Problem 5.19P

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Question

Given the following information, select the scraper type of that is the best option for the job based on economy.

Also assume that the mobilization costs are $500, $700, and $1,300 for the 621, 631, and 657 scrapers, respectively.

Time (hr)
Average Flywheel Horsepower
TΥΡΕ
621G Scraper
631G Scraper
23
330
19
462
657G Scraper
10
564
Consider the following costs:
Fuel consumption rate
0.04 gallon /fwhp-hr
$2.50/ gallon
$1.47/ hr
$2.13 hr
$38.50/ hr
$1.36/hr
Fuel cost
Oil, filters, etc.
Tires
Operator
General Repairs

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