A fully loaded CAT $627H$ scraper is hauling dry clay over a haul road that

consists of poorly maintained earth. Refer to Table $4\mathrm{.}4$ on page $106$ of your

text book for the properties of the clay. The rolling resistance over the

poorly maintained earth haul road is $160lbs$ per ton. The fully loaded scraper

is climbing a $6\%$ grade to the construction site. Please see the attached

specifications for CAT wheel tractor$-$scrapers.

a$.$ Compute the rolling resistance in effective grade for the fully loaded

condition.

b$.$ Compute the maximum volume of dry clay that the scraper can safely haul

in lcy$.$

c$.$ Compute the grade resistance in pounds for the fully loaded condition.

d$.$ Compute the total resistance in pounds for the fully loaded condition.

e$.$ Compute the required rimpull in pounds for the fully loaded condition.

f$.$ Compute the available rimpull in pounds for the fully loaded condition.

Assume a COT of $0\mathrm{.}45$ for the poorly maintained earth haul road.

g$.$ State whether the available rimpull is sufficient for the haul. Explain your

answer.

"The swell factor is equal to the loose weight divided by the bank weight per unit volume.