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Wastewater from a paper mill contains ultimate BOD of 200ppm and DO of 3ppm, water is discharged at a rate of 100,000 gallons per day into a river, the river has a flow of 1 million gallons per day
To prevent this high compression load from buckling the copper pipe, a solid steel support of 2 1/2 inch diameter is placed inside the copper pipe. The copper pipe is 8.000 inches long. The steel su
A simple supported beam 6m long is composed of two C200x28 channel RIVETED FRONT TO FRONT . What uniformly distributed load can be carried in addition to the weight of the beam w/o exceeding a flexu
The frame is supported in part by normal and friction forces between the wall and the plate at A. Determine the friction force exerted on the plate at A. Also determine the minimum required coeffic
The bar under the applied force is now 2.448 meters long. Calculate the following for the bar: a) engineering stress, b) engineering strain, c) true strain, d) Young's modulus, e) What additional in
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.
if the sludge concentration in the return sludge line from the secondary clarifier were the same as the MLVSS concentration.WOULD recycle of return sludge increase the sludge age why
A steel bar is attached to a wood support beam with four 20 mm diameter lag screws. The steel bar is 75-mm-wide by 6-mm-thick. For the steel bar, the yield strength is 260 MPa and the ultimate beari
A rotating shaft with an applied torque of 400 Newton-meters is held in place (stopped) by a shaft key. The diameter of the shaft is 15 centimeters. The shaft key has a length of 20 cm, and is squar
Neglecting the effect of altitude of local gravitional acceleration, determine the vertical distance climbed. Assume an average air density of 1.18 kg/m^3.
A manometer of water reads a height of 20cm at a temperature of 15 degrees C. If the diameter of the manometer tube is 1mm, what is the static height reading
Precipitation station X was inoperative for part of a month during which a storm occurred. The respective storm at the three surrounding stations A,B and C were 98,80 and 110mm
The tank has an inside diamater of 100 cm and will be subjected to a maximum internal pressure of 820 kPa. The allowable tensile stress in the wall is 83 MPa, and the allowable tensile stress in the
A tray rests on an extendible arm consisting of two steel tubes with two different outer diameters. The downward force at the tray center F0 = 1000 N. Determine the downward deflection of the tray c
Biological treatment processes for wastewater can be catogarised as dispersed growth and attached growth systems. Discuss the advantages and disadvantages of attached growth systems over dispersed g
Calculate the Air flow required in CFM to transfer 5,004 BTU/Hour in an HVAC duct given that the temperature difference (Delta-T) between the room and the supply air is 23 DegF.
Draw a P-V diagram for pure component and label appropriate points such as superheated region, isothermal line, etc.
A mass of 200g of saturated liquid water is completely vaporized at a constant pressure of 100KPa. Determine a) the volume change b) the amount of energy added to the water
The cable is taut and prevents motion of point B in the x-z plane (i.e. acts as a pin for y-axis buckling), but offers no restraint to motion in the y-z plane (i.e. is unsupported for x-axis bucklin
Two box culverts each is 0.61 m by 0.61 m and has n = 0.013, Ke = 0.05, Cd = 0.85, L = 30 m, So = 0.7%, and HW = 1.5 m. a. What is the design flow capacity for free outlet condition b. What is the d
A 1 m diameter unfinished concrete pipe (n = 0.015) has a slope of So = 0.001 and conveys water at Q = 0.5 m3/s. Find the normal depth yo and critical depth yc.
However, design codes which deal with shear friction design place an upper limit on the magnitude of the shear force for which the plane can be designed. Explain why this is so.
The design of a masonry wall to support vertical compression loading is influenced by the same factors that affect the design of all compression elements. One of these factors is the extent of rotat
A siphone generates a flow of 1 ft/sec thru a 1 inch OD, 3/4 ID hose. A) What height difference is needed to generate this flow B) What height for 10 ft/sec C) What for 100 ft/sec
The power loss, p , in a journal bearing depends on length, L; diameter, D; clearance, c; and rotational speed, w. You also have to worry about lubricant viscosity, density, and pressure. Obtain the