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A conventional water treatment plant treats 2.40m^3*s^-1 of river water. The filters in the plant are 8.0x8.0m surface area and operate on the following schedule. A filter is cleaned once in each 24-hr period, and a backwash rate is 10.0 L*m^-2*s^-1 fora period of 8 min. it takes an additional 8 min to drain the filter and break up the media with air injection. of the total fitler cylce time of 24 hours, 15 mins is used for rinsing the filter after backwashing. During production, water is applied to the filter at a rate of 5.50 L*m^-2*s^-1
(a) What is the filter efficiency?
(b) What is the minimum number of filters required by plant?
Design a single angle strut connected to a gusset plate to carry 180k n factored load. The length of the strut between center to center intersection is 3m.
Plot variation with depth from the top to Point C for σ' v and σ h when the soil is at rest and Estimate the undrained shear strength (c u ) of clay. (Assume the shear strengths to be 200 kPa and 2 kPa at Liquidity Index (IL) values of 0 and 1, res..
What should TAC , TAB and the acute angle ? between TAB and the vertical to minimize the tension TAB ? Take o and W = 1,000 N. Hint: Consider various possible force triangles and decide on inspection how to minimize TAB.
The 5-m long cantilever beam using a W410 x 67 standard wide flange section has a distributed load of 1200 N/m placed on it. It is also supported by a cable at B, of length 2 m with a 7 mm2 cross sectional area. What is the force in the wire
Assuming the resulting hole acts like an isentropic converging nozzle with a throat diameter of 0.08 cm, calculate the mass flowrate in kg/s of methane that initially escapes from the tank.
determine a dollar amount on December 31st , 2011 FOR $1000 equal payments made at the end of each of the previous 7 years including the current year. use an effective interest rate of 10% compounded annually.
The oven exhaust gases are available at 250 F. Assume that the design temperature and residence time have been established as 1300 F and 0.6 sec, respectively. The type of burner used in the process requires outside air at a moass ratio of 12:1
Office workers complain that the noise level in their office Area 1 is greater than that in the company's other office Area 2. Six measurements are made on different days in each area, with the following results
Assume that the energy contained in coal is about 10,000 Btu/lbm. An electrical power plant burning coal has an output capacity of 1200 MW and the plant converts about 30% of the input energy to electricity.
The curve is to be redesigned for a 70 mph design speed in the year of 2025. Vehicle braking technology has advanced so that the recommended design deceleration rate is 25% greater that the 2011 value used to develop
A water main springs a leak and the geyser is estimated to be 20 feet in height. It is also estimated that about 300 gallons per minute is leaking based on flow into gutter. About how big is the hole in the water pipe
Cooling at constant pressure followed by heating at constant volume. Calculate Q, W, change in U, and change in H for each of these processes, and sketch the paths of all processes on a single PV diagram.
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