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A compacted fill is being built with two sheep's-foot drum rollers, 5 ft wide, operating at 1.5 mi/hr. Four passes are required to obtain the 5-in. depth of compacted fill to meet the specifications density. Your company has a spread of 15-cy, loose measure, trucks to haul the fill dirt to the compacted area. Analysis of the soil conditions indicates a 15-cy loose measure truck is equivalent to 10.8-cy compacted measure.
a. if the cycle time of a single truck is 15 min, how many trucks are required?
b. If 140,000 cy of compacted fill are required using the type of compaction drums described, how many drums are required if the project is to be completed in 25 working days?
An open rectangular channel is 50 feet wide, flowing at a depth of 5 feet, and is carrying 1000 cubic feet per second. What is the maximum step height than can be placed into the flow without disturbing the upstream depth, without acting as a chok..
After 5 seconds the force is continuous at the 50 N level. Determine the velocity of the cart at t=8 seconds and calculate t at which the cart velocity is zero.
An ocean outfall diffuser that discharges treated wastewater into the Pacific Ocean is 500m from a public beach. The wastewater contains 105 coliform bacteria per milliliter. The wastewater discharge flow rate is 0.3 m3/s.
The effluent contains 20 mg/L of solids and 20 mg/L of BOD the biological treatment process produced .32 kg of bacterial solids per kg of BOD removed
Calculate the minimum-sized sand particle that would be removed in the chamber. To be removed, the particles must settle the depth of 2 m during the period the wastewater spends in the chamber (dT=V/Q).
If 110 mg/L Alum (Al2(SO4)3 14H2O) is added to water containing a natural alkalinity of 20 mg/L as CaCO3, 1) how much lime (mg/L as CaO) must be added to react with the alum 2) How much precipitate (mg/L as Al(OH)3 ) is formed
The beam species is douglas fir-larch a) check for beam shear b) check the beam for deflection, knowing deflection limitation is L/360 (given L =12 ft) Given: L=12 Beam Size 9.50" x 10.50" fv= 1.50V/A Deflection Max = 19PL^3/384*E*I
create a visual, window-based program for multiplying two 3x3 matrices together. Create 18 text boxes for input and 9 text boxes or labels for output
Air can be assumed as a di-atomic ideal gas. Find the final temperature and the amount of work ( in kW) required for air compression at a rate of 100 mol/s , from an initial condition of 1 bar an 25 C to 10 bar; for the following ways:
The shovel's production at a 100% efficiency is estimated to be 300 BCY/h. and efficiency is 0.80. Truck travel time is estimated to be 8.0 minutes, and truck fixed cycle time (excluding loading ) is estimated to be 2 minutes.
Prepare an outline of the experimental design you will suggest to the plant manager. This outline should contain research rationale, aims and objectives, research methodology, nature of data analysis and interpretation, and possible outcomes/concl..
Consider a system that consists of 4 devices. The probabilities of failure for each of the devices are, respectively: 10%, 25%, 20%, and 30%. (a) If these components were in series, what is the probability that the system operates
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