The 6-inch scale rule contains ________ scales.
Fill in the blank(s) with the appropriate word(s).
eleven
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An engineer brings you a basic design for a steam power plant. The heat is input to the plant from a source at 500oC, and heat is rejected to cooling water at 20oC. The power plant is to produce 250 MW of power while receiving heat at a rate of 700 MW. Is this process possible?
Given: Proposed: TH = 500oC = 773 K; TC = 20oC = 293 K; Q?H=700 MW; W?=250 MW
A viscous type vibration damper shows trace fluid leakage. Which of the following is recommended?
A. seal with silicone B. check with a balance sensor C. repair weld the crack D. replacement
Discuss how cultural practices can be used to control weeds
What will be an ideal response?
Freeport McMoRan engineers estimated that the capital investment necessary for recovering valuable metals (nickel, silver, gold, etc.) from a copper refinery’s wastewater would be $150 million. The equipment is expected to have a useful life of 10 years with no salvage value. The amount of metal currently discharged in the wastewater is 12,500 pounds per year. The recovered metals are expected to have a selling price of $250 per pound. The efficiency relation of the recovery operation is represented by X 0.5, where X represents the efficiency in percentage. What value of X is necessary for the company to break even? Assume i = 10% per year.
The costs and revenue projections for a new product are estimated. What is the estimated profit at a production rate of 20% above breakeven? Fixed cost = $500,000 per year Production cost per unit = $200 Revenue per unit = $250