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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?
Also, 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.
many years ago well-known architect frank lloyd wright nbspdesigned a mile-high skyscraper which has never been built.
Estimate the liquid volume of an aeration tank (units of m^-3) required to treat the following wastewater to a BOD effluent standard of 30.0 mg L^-1 and a suspended solids effluent standard of 30 mg L^-1.
The length of a reading room in a library is 10 m and its breadth is 8 m. Compute the distributed live load, assuming the basic value of the load to be 2873 N/m2.
A 60 MW Rankine steam power cycle in Iceland uses reheat. The system is comprised of a single adiabatic pump, a boiler using geothermal energy, two adiabatic turbine stages and a condenser.
in a hydrometer test , the results are as follows:Gs =2.60 , temperature of water=24c ,and R=43at 60 min after the start of sedimentation . what is the diameter , D, of the smallest -size particles
An equal tangent vertical curve conects an initial grade of -3% and a final grade of +1% and is designed for 60mi/h. The PVI is at station 250+50 and elevation 732 ft. What is the station and elevation of the lowest point on the curve
What is the dry unit weight, the saturated unit weight, and the buoyant unit weight, of a soil having a void ratio of 0.5 and a value of Gs of 2.7?
To float a 160 pound man using helium balloons (assume 0.52 cubic feet per inflated balloon). How many balloons would it take? Assume density of air is 1.29 kg/cubic meter and the density of helium is 0.179 kg/cubic meter.
The maximum hoop stress is (65000/2) psi and the maximum shear stress is 16000 psi. If the diameter of the tank is 7 inches,what is the minimum wall thickness.
A Pelton wheel, located at an elevation of 200.0 m, is used to extract power from a reservoir at an elevation of 800 m. A penstock 1500 m long and 0.8 m in diameter connects the reservoir with the nozzle of the Pelton wheel.
Using the stress transformation equations only,given a stress state where sigma x=105 MPa,sigma y=75 MPa and tau xy=25 MPa, determine the stresses acting on an element oriented at an angle 40 degrees from the x axis.
What are the annual runoff coefficient (Runoff /Rainfall ratio) for the sub areas and for the total watershed taken as whole Sub-area Area (m2)/ Annual Precipitation (mm)/ Annual Evaporation (mm) A 10.7 1030 530 B 3.0 830 438 C 8.2 900 430 D 17...
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