?What is a dog used for?
A. ?It is used to align pipe ends for welding.
B. ?It is used to brace up piping systems.
C. ?It is a temporary plug to prevent gas leaks.
D. ?They can be used to collect fittings for welding.
Answer: A
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Two types of gases that tend to concentrate in and along low areas are:
a. acetylene and propylene
b. methane and butane
c. propylene and propane
d. butane and propane
Which 12V lead acid battery would likely have the highest internal resistance?
A. A fully-charged battery at 32°F (0°C) B. A battery with an open circuit voltage measurement of 12.6V C. A battery that has electrolyte with a specific gravity of 1 D. A fully-charged battery at 72°F (22°C)
If a dam were built to create a reservoir impounding part of the Ganges, what characteristic trophic state might you expect for the reservoir? Explain your answer.
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? What will be an ideal response?
A commercial dairy cow is usually milked twice a day.
Answer the following statement true (T) or false (F)