ASSIGNMENT $1$ co$9$ss wfignt ivass:

vimicte seceo

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Fig. $2\mathrm{.}5$b Retarder Chart for Mechanical Drive Trucks Table $2\mathrm{.}2$ Speed Factors

$A.$ A rear dump off$-$highway truck with a net vehicle weight $of55t$ has been chosen $to$

haul blasted oxidized $(loose)$ rock from $an$ open pit mine $to$ a dumpsite through the

road sections given below. Using the performance and retarder charts for Terex $3309$

hauler determine the truck total travel and return times $if$ its payload $is110231lbs.$

Road Section Length $(m)$ Rolling Resistance $(\%)$ Grade Resistance $(\%)$

$a$

$762$

$b$

$122$

$c$

$457$

$5$

$0$

$1$

$0$

$d$

$100$

$10$

$e$

$153$

$4$

$4$

$3$

$5$

$0$