Answer the following statement(s) true (T) or false (F)
1. Many schematic diagrams use a legend to aid in understanding.
2. The service cord is thought of as a major component of a schematic diagram.
3. An electric resistance heating element is used to provide heat in cool weather.
4. A double-acting thermostat can be used instead of a single-pole single-throw.
5. A start capacitor can be connected in series with the run capacitor to increase the starting torque of the compressor.
1. TRUE
2. FALSE
3. TRUE
4. TRUE
5. FALSE
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Given a cable tray that is available in standard widths of 6, 12, 18, 24, and 36 inches, what is the minimum width of a 3-inch deep cable tray used for the following cables that are all 4/0 or larger: two with 1.5-inch diameter; three with 1.75-inch diameter; and two with 2.5-inch diameter?
a. 6 inches b. 12 inches c. 18 inches d. 24 inche
Calculate the BOD of the river water
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?
Por lo general, la escala de un esquema se encontrará en:
a. la lista de símbolos. b. el bloque de títulos del esquema. c. el diagrama de acometida de energía. d. la lista de aparatos de iluminación.
The design similar to the System 4 design that was developed by two British researchers is
the _________ design.
a. conglomerate b. organic c. matrix d. divisional e. global