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the level of water in a city water tower is 125ft. above the ground. The tank is kept with an air space which can be pressurized with compressed air. It is important to maintain a pressure at the bottom of the tower at 75 psig. What gauge pressure has to be applied to the air in the top of the tower to get the required pressure at the bottom of the tower. If the atmospheric pressure is 755mmHg, what is the absolute pressure at the bottom of the tower. Draw the system and show the pressure gauges.
Laboratory analysis methodology to be used. Give details on the standard methods, instrument and detection limits. Standard methods for heavy metals analysis exist
How many 3:4-inch diameter rivets are required to transmit 55,000 lb from the two angles to the gusset plate if the allowable shear stress in the rivets is 15,000 psi Assume each rivet carries the same amount of load.
A sealed insulated room contains 90 m^3 air at 12 C and 100 kPa. A container with 45 kg of water at 95 C is placed in the room. After heat transfer between the air and water, thermal equilibrium is reached.
The head difference between manometer levels was 4.9 cm during the test, and the water temperature was 20 degrees celcius. If it took 152 second for 500 ml of water to discharge, determine the soil's coefficient of permeability.
(a) Determine the desired diameter of the disk. (b) If the rubber strain is not to exceed 0.2 in/in, determine the maximum allowable compressive force. Recall that the spring constant, k=Fx,or in terms of an axially loaded member
The horizontal motion of plunger and shaft is arrested by resistance of the attached disk which moves through the oil bath. If the velocity of plunger is v.
A glass tube with inside diameter of 2-mm is inserted vertically into a dish of mercury at 20°C. Determine the difference in mercury levels inside and outside the tube.
The plate is submerged in a liquid is a vertical position with the parallel sides horizontal and the shorter parallel side at the top and exactly in the surface of the liquid.
Calculate the size of an anaerobic digester required to treat the sludge from a primary clarifier designed to treat 38,000 m3/d of sewage. The quantity of dry volatile solids removed by the plant is 0.15 kg dry solids/m3 sewage.
A soil specimen has a water content of 18% and a wet unit weight of 118.5 lb/cu. ft. The specific gravity of solids is found to be 2.72. Find the:
The water pressure in the municipal pipeline is 450 kPa, the sum of the local loss coefficients in the building pipes is 11.0, and the flow to be delivered to the top floor at 25 L/s through a 150-mm diameter PVC pipe.
At a parking lot, vehicles arrive according to a Poisson process and are processed (parking fee collected) at a uniform deterministic rate at a single station. The mean arrival rate is 4 veh/min and the processing rate is 5 veh/min.
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