Engineering, 25.02.2021 17:30 raven1619
Solve by spreadsheet: A company has been discharging its waste into a holding pond for years. The pond is full and overflowing into a river for the last 6 months. The concentration of the primary waste in the pond is 35 mg/L. All of a sudden, the process changes, and the concentration of the waste in the stream coming into the pond jump to 250 mg/L. The pond is 500,000 L and the flow rate of the waste coming into it is 75,000 L/day. How many hours will it take until the waste concentration in the overflow stream going into the river reaches the danger level of approximately 50 mg/L?
Answers: 1
Engineering, 04.07.2019 08:10
Which of the following is an easy way to remember the modified “x” tire rotation? a. nondrive wheels straight, cross the drive wheels b. drive wheels straight, cross the nondrive wheels c. drive wheels crossed, nondrive wheels straight d. drive wheels crossed, nondrive wheels crossed
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Engineering, 04.07.2019 18:10
Thermal stresses are developed in a metal when its a) initial temperature is changed b) final temperature is changed c) density is changed d) thermal deformation is prevented e) expansion is prevented f) contraction is prevented
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Engineering, 04.07.2019 18:10
Water in a partially filled large tank is to be supplied to the roof top, which is 8 m above the water level in the tank, through a 2.2-cm-internal-diameter pipe by maintaining a constant air pressure of 300 kpa (gage) in the tank. if the head loss in the piping is 2 m of water, determine the discharge rate of the supply of water to the roof top in liters per second.
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Engineering, 04.07.2019 18:10
Which of the following components of a pid controlled accumulates the error over time and responds to system error after the error has been accumulated? a)- proportional b)- derivative c)- integral d)- on/off.
Answers: 2
Solve by spreadsheet: A company has been discharging its waste into a holding pond for years. The po...
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