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a) What is the difference between a combined sewer system and a separate sewer system? Which is preferable? Why?
b) A rural town with sewered population of 4,500 has a daily wastewater flow of 1,590 m3/day with an average BOD of 280 mg/L including industrial wastes. The industrial discharges to the municipal sewers are 57 m3/day at 1,800 mg/L BOD from a slaughterhouse and 70 m3/day containing 32 kg of BOD from a soup-canning plant. Calculate the per capita contribution of domestic flow { in L/(person.day)} and BOD {in g/(person.day)}excluding the industrial wastewaters.
c) A sanitary sewer with a 450 mm diameter is constructed on the minimum allowable slope of 0.9 m/km. What is the full capacity of the sewer? At what depths of flow in the pipe are the velocities of flow equal to 0.6 m/s. Assume Mannings constant n = 0.013.
d) List some of the advantages and disadvantages of rectangular primary sedimentation tanks over circular sedimentation tanks which must be considered prior to the selection.
e) Two rectangular primary sedimentation tanks each 27 m long, 5 m wide and 3.8m deep treat 6000 m3/day wastewater from a community. Total effluent weir length is 50m (both tanks). Calculate the detention time, surface overflow rate (in m3/m2.day), and weir loading rate (in m3/m.day).
A 10 kg block is being pulled down a slope with an angle of 20 degrees and has a velocity of .2 m/s. Determine the force required
To what maximum angle, measured from vertical, does the rod (with the attached ball of clay) rotate?
The wedge is used to level the member. Determine thehorizontal force P that must be applied to move the wedge to theright. The coefficient of static friction between the wedgeand the two surfaces of contact is ts=.25.
What is the concentration of NH3 (in mg/L) of household ammonia that contains 3.00 percent by wieght of NH3. Assume the density of water = 1000kg/m^3
The measurements of the nominal shear strength (in kN) for a sample of 15 prestressed concrete beams are as follows: 580 400 428 825 850 875 920 550 575 750 636 360 590 735 950
To determine the elevation of a point B from the elevation of a point A, which is 511.6 ft. When the transit was set up over the point A, the height of the transverse axis above that point was 4.92 ft.
The tank is heated to a pressure of 10 bar. Assuming that Xe behaves like an ideal gas with a specific heat ration of 1.7, Calculate the amount of heat transferred during the process in Kj.
determine the transformed moment of inertia for the beam using steel as the reference material. Express your answer in in^4 to the nearest 0.1 in^4.
A full tank (3 m height) discharges water from an output pipe following the equation: W_out = A z^1/2. Calculate the time required to reduce the level to 1 m. Data: A _s = 1 m^2, A = 0.2777 kg (s m^1/2), density water = 1000 kg/m^3
Assuming that silt is equivalent to a liquid having a density of 1760 kg/m3, determine the overturning moment of silt and water about point A.
a wall 8 ft high is 3/3/8 ft. from a house. find the shortest ladder which will reach from the ground house when leaning to the wall.
write a computer program that generates a sequence of binomial random variables with parameters n=20 and p=0.3. a) use the inverse c.d.f approach
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