Identify the major components of a kettle reboiler.
shell outlet
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Calculate the BOD of the sewerage stream
The Ganges River, shown in Figure 4.66, has an annual average flow rate of 12,105 m3/s. The average temperature of the Ganges River was reported to be 24.6ºC. The Ganges has become contaminated with raw sewerage and industrial waste so that the dissolved oxygen in the river upstream of sewerage discharges is 4.6 mg/L. Suppose that the raw sewerage that is untreated flows into the Ganges at a rate of 460 m3/s, the temperature is 25ºC, and the dissolved oxygen in the sewerage stream is completely depleted (i.e. DO = 0). How would you develop a plan for improving water quality in the Ganges River?
Suppose the following data was collected to estimated the five-day BOD in the river and sewerage water:
What will be an ideal response?
On a transaxle, all of the speed gears are attached to the input shaft with lock rings.
a. true b. false
When considering power control, a ____ may be adequate if the load is small and the control requirements are minimal.
A. toggle switch B. contactor C. pressure switch D. motor starter
According to the power triangle, the apparent power is _____.
a. less than the true power b. greater than the true power c. less than the reactive power d. equal to the reactive power