Which of these is the correct statement regarding SDSs/MSDSs?
a. They are only required for acids.
b. They need only be stored at the employee?s corporate offices.
c. They must be available at the job site to workers.
d. Workers must be provided access to them through the Internet.
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?
Describe President Eisenhower's response to the Civil Rights movement, to the social-welfare programs of the New Deal, and to federal government spending to promote economic growth, jobs, and education.
What will be an ideal response?
What category of electric meter is intended for measurement at the electric meter base?
A) Category I B) Category II C) Category IV D) Category III
A heat pipe heat exchanger _____
a. transfers heat from one end of the exchanger to the other b. is an active device that needs no electrical energy input c. only operates if the supply and exhaust airstream temperatures are equal d. decreases the dehumidification capacity of a system