A. A four-wheel tractor whose operating weight is 47877 Ib has pulled up a road whose slope is +3.5% and uniform speed. If the average tension in the cable is 4800 Ib, what is the rolling resistance of the road? B. A pneumatic-tired tractor with a 354-hp engine has a maximum of 6.5 mph in second gear. Determine the maximum rimpull of the tractor in current gear if the engine efficiency is 91%. C. An embankment is to be constructed at 10% moisture content. The material will be placed at the rate of 250 c-cy/hr. The specified dry weight of the compacted fill is 2850 Ib/cy. How many gallons of
A. A four-wheel tractor whose operating weight is 47877 Ib has pulled up a road whose slope is +3.5% and uniform speed. If the average tension in the cable is 4800 Ib, what is the rolling resistance of the road? B. A pneumatic-tired tractor with a 354-hp engine has a maximum of 6.5 mph in second gear. Determine the maximum rimpull of the tractor in current gear if the engine efficiency is 91%. C. An embankment is to be constructed at 10% moisture content. The material will be placed at the rate of 250 c-cy/hr. The specified dry weight of the compacted fill is 2850 Ib/cy. How many gallons of
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:A. A four-wheel tractor whose operating weight is 47877 Ib has
pulled up a road whose slope is +3.5% and uniform speed. If the
average tension in the cable is 4800 Ib, what is the rolling
resistance of the road?
B. A pneumatic-tired tractor with a 354-hp engine has a maximum of
6.5 mph in second gear. Determine the maximum rimpull of the
tractor in current gear if the engine efficiency is 91%.
C. An embankment is to be constructed at 10% moisture content. The
material will be placed at the rate of 250 c-cy/hr. The specified dry
weight of the compacted fill is 2850 Ib/cy. How many gallons of
water must be supplied each hour to increase the moisture content
of material from 5 to 10 by weight?
D. How many days required to excavate 456480 Bc-yd by utilizing
three shovels (size 5 c-yd – output 317 c-yd/hr) for 10 hours each
day.
E. Determine the productivity of (3 c-yd) shovel when the height
swing factor (0.97), fill factor 95%, and efficiency 50 min-hr. (cycle
time 23 second)
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