Support angles for bridge decks should not be welded to the flanges of beams that _____
a. have a web less than 8" deep
b. are in tension
c. rest on a bridge center pier
d. are in compression
b
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____ alloys have excellent wetting, flow, and strength characteristics, but they are expensive.
A. Tin-antimony B. Cadmium-silver C. Cadmium-zinc D. Copper-zinc
An Australian steel company, ASM International, claims that a savings of 40% of the cost of stainless steel threaded bar can be achieved by replacing machined threads with precision weld depositions. A U.S. manufacturer of rock bolts and grout-in-fittings plans to purchase the equipment. A mechanical engineer with the company has prepared the following estimates for additional costs and savings over the next 4 years (16 quarters). Costs decrease for some time, then increase rapidly as the equipment ages. Savings peak at $80,000 for some quarters, but then decrease as expected competition takes its toll. The U.S. manufacturer president is not sure of the time frame to plan for the use of this new technology. The decision, in part, rests upon the rate of return achievable as the
years of use progress. In the past, projects must return at least 24% per year to be retained.
(a) Determine the expected rate of return per quarter for 2 years (8 quarters) and beyond using a spreadsheet.
(b) Plot i* versus quarter to graphically illustrate your results.
(c) Make a recommendation on the number of years to use the technology to economic advantage.
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How is the Hobbs Act currently used in the construction industry?
What will be an ideal response?