Technician A says in case of extremely hard carbon deposits, an old valve can be used to break off carbon before cleaning. Technician B says some valve spring compressors can be used on or off the car. Who is correct?
A. Technician A
B. Technician B
C. Both technicians
D. Neither technician
Answer: C
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Calculate the ultimate BOD of the river, assuming kL = 0.20 day–1.
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?
Find a significant hydroelectric-power-generating plant in your state. Describe its location, its sources of water, and the power output in megawatts.
What will be an ideal response?
Technician A says an accelerometer may be mass-type, roller-type, or solid-state. Technician B says when a photodiode is in the photo conductive mode, it is reverse biased when no light is applied. Who is correct?
A. Technician A only B. Technician B only C. Both Technician A and B D. Neither Technician A nor B
Technician A says that a lack of lubrication on the back of the disc brake pads can cause brake noise. Technician B says that pads that are not correctly crimped to the caliper housing can cause brake noise. Which technician is correct?
A) Technician A only B) Technician B only C) Both Technicians A and B D) Neither Technician A nor B