Solve and reduce all answers to lowest terms: (3/4 hour - 1/8 hour) x 9
What will be an ideal response?
5 5/8 hours
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A large water utility is planning to upgrade its SCADA system for controlling well pumps, booster pumps, and disinfection equipment so that everything can be centrally controlled. Phase I will reduce labor and travel costs by $28,000 per year. Phase II will reduce costs by an additional $20,000 per year, that is, $48,000. Phase I savings should occur in years 0, 1, 2, and 3 and phase II savings should occur in years 4 through 10. Let i = 8% per year.
(a) Using a spreadsheet determine the present worth of the upgraded system for years 1 to 10. (b) The utility General Manager had hoped for a present worth of at least $400,000. Determine the interest rate at which this would be correct.
Which of the following operating conditions requires the most frequent lubrication of the driveshaft?
A. 4x4 vocational off-highway B. pick-up and delivery C. linehaul trucking D. less-than-load
There are no check valves or extra metering devices on most water-source packaged units because:
A) Most water-source packaged units use suction line accumulators and charge compensators. B) The heat exchangers are most often made of copper, cupronickel, or stainless steel. C) Water-source packaged units have a much lower operating temperature range than air-source units. D) Most water-source packaged units use a single bi-flow thermostatic expansion valve.
When reviewing the location of main electrical runs and fire sprinkler system lines on a floor plan in a set of
drawings, you should look for _____. a. the building's geographic location b. relevant NFPA code annotations c. possible installation conflicts d. the pitch of the building's roof