____________________ is a system that uses input and output data from real-world processes and machinery interfaces.
Fill in the blank(s) with the appropriate word(s).
SCADA
supervisory control and data acquisition
supervisory calculation and data analysis
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The ____ was developed by the U.S. Army Corps of Engineers to classify soils for use in roads, embankments, and foundations.
A. Unified Soil Classification System B. American Association of State Highway and Transportation Officials System C. Chicago Center for Green Technologies D. American Society of Testing and Materials
Good watering practices will reduce plant damage caused by low humidity
Indicate whether the statement is true or false
A(n) ____________________ joint is made by placing plates at a 90 degree angle to each other, with the edges forming a V groove.
Fill in the blank(s) with the appropriate word(s).
Steel cable barriers in highway medians are a low-cost way to improve traffic safety without overstressing department of transportation budgets. Cable barriers cost $44,000 per mile, compared with $72,000 per mile for guardrail and $419,000 per mile for concrete barriers. Furthermore, cable barriers tend to snag tractor-trailer rigs, keeping them from ricocheting back into same-direction traffic. The state of Ohio spent $4.97 million installing 113 miles of cable barriers. Answer the following using both tabulated factors and a spreadsheet function.
(a) If the cable barriers prevent accidents totaling $1.3 million per year, what rate of return does this represent over a 10-year study period? (b) What is the rate of return for 113 miles of guardrail if accident prevention is $1.1 million per year over a 10-year study period?