Railings should be used at stairs, landings, decks, and open balconies higher than _____ above the floor.
A. 12" (300 mm)
B. 18" (450 mm)
C. 24" (600 mm)
D. 30" (750 mm)
Answer: D
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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?
An electric window with a two-wire motor operates only in one direction. Which of the following could cause this problem?
A. Faulty window switch B. Faulty window motor C. Faulty system circuit breaker D. All of the above
The length of a spring when a specified load is applied to it is referred to as the loaded length.
Answer the following statement true (T) or false (F)
Name a cutting tool that uses a high velocity stream of water combined with an abrasive substance to cut through various materials with compressed fluid at 60,000 pounds per square inch (psi) is forced through a very small orifice, which creates a thin stream of water traveling close to 600 miles per hour (mph)
What will be an ideal response?