Chapter 7DOZER PRODUCTION EFFICIENCYGIVEND9N Dozer (Fig. 7.14)Move 2000 LCYDistance - 400 ft. (Fig. 7.14)Grade - 1% uphill (Table 7.2)Material - Loose stockpile (Table 7.2)Operator Skills- Excellent (Table 7.2)Actual Time Working - 50 min/hr (Efficiency)Operator Technique - slot dozing (Table 7.2)Visibility - N/A (Table 7.2)Material Weight- 2100 lb/CY (standard weight is 2300. Divide 2300 by materialweight to get the factor)Transmission - Direct drive (Table 7.2)Dozer Blade - Straight bladeD9N Book Efficiency (Fig. 7.14) X above factors = Actual EfficiencyFactors: grade x material weight x operator x type material x operator technique xvisibility x efficiency x transmission x type bladeEfficiency x Factors = Actual Efficiency = ,LCY/HR. Tabe7.2TABLE 7.2 Caterpillar job condition correction factors for estimating dozer productionTrack-type tractorWheel-type tractorOperatorExcellentAveragePoorMaterialLoose stockpileHard to cut; frozenwith tilt cylinderwithout tilt cylindercable-controlled bladeHard to drift; "dead" (dry, noncohesivematerial) or very sticky materialRock, ripped or blastedSlot dozingSide-by-side dozingVisibilityDust, rain, snow, fog, or darknessJob efficiency50 min/hr40 min/hrDirect-drive transmission(0.1-min fixed time)BulldozerAdjust based on SAE capacity relativeto the base blade used in the estimateddozing production graphsGrades-see the graph1.000.750.601.000.600.501.201.200.800.700.600.800.750.800.60-0.801.201.15-1.251.201.15-1.250.800.700.830.670.830.670.80% Grade vs. Dozing Factor(-) Downhill(+) Uphill1.81.61.41.21.00.80.624-30-20-10+10+20+30lades and cushion blades are not considered production-dozing tools. Depending on jobblade and C blade will average 50–75% of straight-blade production.tesy of Caterpillar Inc.

efficiency : The capacity to avoid wasting materials, energy, efforts, money, and time when…

GIVEN D9N Dozer (Fig. 7.14) Move 2000 LCY Distance- 400 ft. (Fig. 7.14) Grade - 1% uphill (Table 7.2) Material- Loose stockpile (Table 7.2) Operator Skills - Excellent (Table 7.2) Actual Time Working- 50 min/hr (Efficiency) Operator Technique - slot dozing (Table 7.2) Visibility- N/A (Table 7.2) Material Weight- 2100 lb/CY (standard weight is 2300. Divide 2300 by material weight to get the factor) Transmission - Direct drive (Table 7.2) Dozer Blade – Straight blade D9N Book Efficiency (Fig. 7.14) X above factors = Actual Efficiency Factors: grade x material weight x operator x type material x operator technique x visibility x efficiency x transmission x type blade Efficiency x Factors = Actual Efficiency = LCY/HR.

GIVEN D9N Dozer (Fig. 7.14) Move 2000 LCY Distance- 400 ft. (Fig. 7.14) Grade - 1% uphill (Table 7.2) Material- Loose stockpile (Table 7.2) Operator Skills - Excellent (Table 7.2) Actual Time Working- 50 min/hr (Efficiency) Operator Technique - slot dozing (Table 7.2) Visibility- N/A (Table 7.2) Material Weight- 2100 lb/CY (standard weight is 2300. Divide 2300 by material weight to get the factor) Transmission - Direct drive (Table 7.2) Dozer Blade – Straight blade D9N Book Efficiency (Fig. 7.14) X above factors = Actual Efficiency Factors: grade x material weight x operator x type material x operator technique x visibility x efficiency x transmission x type blade Efficiency x Factors = Actual Efficiency = LCY/HR.

Residential Construction Academy: House Wiring (MindTap Course List)

4th Edition

ISBN:9781285852225

Author:Gregory W Fletcher

Publisher:Gregory W Fletcher

Chapter14: Branch-circuit Installation

Section: Chapter Questions

Problem 11RQ

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