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A wheel tractor-scraper is operating on a level grade, assuming no power derating is required for equipment conditions, altitude, and temperature.
Disregarding traction limitations, what is the maximum value of rolling resistance (in lb/ton) over which the fully loaded unit can maintain a speed limit of 15 mph?
What minimum value of coefficient of traction between the tractor wheels and the traveling surface is needed to satisfy the requirements of part A? For the fully loaded condition, 52% of the weight is idstributed to the drive axle. Operating weight of the empty scraper is 74,946 lb.
A subsurface detention basin is installed beneath a street to help prevent flooding. Water from the rain is chanelled into the basin and begins to infiltrate into the ground when it reaches 1ft.
A differential leveling loop started and closed on BM Juno, elevation 5194.02 ft. The BS and FS distancces were kept approximately equal. Readings (in ft) listed in the order takken are 9.65, 2.11, 2.51, 8.35, 2.06, 9.25, 7.93, 2.83, 5.05, and 4.6..
Base isolation technique has become the method of choice for structural design of buildings and bridges located in highly seismic areas in recent years.
Calculate the elongation of a steel bar 4 feet in length and 4 inches in diameter when subjected to a force of 2.5 kips. Assume that the bar remains in the elastic region with E=30 ksi.
A sewage treatment works (STW) with 4 single-stage trickling filters has become organically overloaded due to the discharge of a biodegradable industrial effluent to the STW. This is causing effluent to pond on the surface of the filters.
What kind of soil labs are good for the construction which is underlying the wet clay is dense sand. For example, compaction, and so on.
At what concentration in ppmv (1.0 atm, 25 C) is the risk from trichloroethylene exposure at an industrial facility equal to 10^-4 for a 70-kg adult male, if the lifetime exposure occurs for 310 days per year over 29 years
Sketch the SCS triangular and curvilinear UHs and the mass curve for a 100-mi^2 watershed which is 60% good condition meadow and 40% good cover forest land. The watershed consists of 70% soil group C and 30% soul group A.
Assume that the sludge does not change density during filtration and that liquid removed from the sludge contains no sludge. Using mass-balance method. determine the volume of sludge after filtration.
a river diversion canal discharges into a concrete flume of rectangular section running down a steep slope. the walss and the floor of the flume are to be 300 mm thick, and the allowance fro freeboard is to be 300mm.
determine the pressure head at the nozzle inlet to produce a water jet velocity of 40 ft/s. Neglect the friction loss and assume incompressible flow.
A circular bar of magnesiuen alloy is 750 mm long. The bar is loaded in tension to an elongation of 6.0 mm, and the load is removed. (a) what is the permanent set of the bar (b) if the bar is reloaded, what is the proportional limit
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