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Engineering Economy

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Engineering Economy 16th edition Solutions Manual

(Economics)

Edition: 16th edition


Author: Crazy for study


ISBN: 9780133439274

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engineering economy is intended to serve as a text for classroom instruction in undergraduate, introductory courses in Engineering Economics. It also serves as a basic reference for use by practicing engineers in all specialty areas (e.g., chemical, civil, computer, electrical, industrial, and mechanical engineering). The book is also useful to persons engaged in the management of technical activities. . Used by engineering students worldwide, this best-selling text provides a sound understanding of the principles, basic concepts, and methodology of engineering economy. Built upon the rich and time-tested teaching materials of earlier editions, it is extensively revised and updated to reflect current trends and issues, with an emphasis on the economics of engineering design throughout. It provides one of the most complete and up-to-date studies of this vitally important field. . Teaching and Learning Experience This program will provide a better teaching and learning experience&mdash.for you and your students. It will help: Personalize Learning: MyEngineeringLab provides students with a personalized interactive learning environment, where they can learn at their own pace and measure their progress. Provide a Solid Foundation in the Principles, Concepts, and Methodology of engineering economy: Students will learn to understand and apply economic principles to engineering. Prepare Students for Professional Practice: . Students will develop proficiency with the process for making rational decisions that they are likely to encounter in professional practice. Support Learning: The TestGen testbank allows instructors to regenerate algorithmically-generated variables within each problem to offer students a virtually unlimited number of paper or online assessments. Note: You are purchasing a standalone product. MyEngineeringLab does not come packaged with this content. . If you would like to purchase both the physical text and MyEngineeringLab . .order ISBN-10: 0133750213/ISBN-13: 9780133750218. . That package includes ISBN-10: 0133439275/ISBN-13: 9780133439274 and ISBN-10: 0133455343 /ISBN-13: 9780133455342. . MyEngineeringLab is not a self-paced technology and should only be purchased when required by an instructor. Sample questions asked in the 16th edition of engineering economy: Five years ago, a company in New Jersey installed a diesel-electric unit costing $50,000 at a remote site because no dependable electric power was available from a public utility. The company has computed depreciation by the straight-line method with a useful life of 10 years and a zero salvage value. Annual operation and maintenance expenses are $16,000, and property taxes and insurance cost another $3,000 per year. Dependable electric sendee is now available at an estimated annual cost of $30,000. The company in New Jersey wishes to know whether it would be more economical to dispose of the diesel-electric unit now, when it can be sold for $35,000, or to wait five years when the unit would have to be replaced anyway (with no MV). The company has an effective income tax rate of 50% and tries to limit its capital expenditures to opportunities that will earn at least 15% per year after income taxes. What would you recommend? Problem Problem The replacement of a planing machine is being considered by the Reardorn Furniture Company. (There is an indefinite future need for this type of machine.) The best challenger will cost $30,000 for installation and will have an estimated economic life of 12 years and a $2,000 MV at that time. It is estimated that annual expenses will average $16,000 per year. The defender has a present BV of $6,000 and a present MV of $4,000. Data for the defender for the next three years are as follows: Year MV at End of Year BV at End of Year Expenses during the Year 1 $3,000 $4,500 $20,000 2 2,500 3,000 25,000 3 2,000 1,500 30,000 Using a before-tax interest rate of 15% per year, make a comparison to determine whether it is economical to make the replacement now. Problem ,Problem 1 Problem A high-speed electronic assembly machine was purchased two years ago for $50,000. At the present time, it can be sold for $25,000 and replaced by a newer model having a purchase price of $42,500. or it can be kept in service for a maximum of one more year. The new assembly machine, if purchased, has a useful life of not more than two years. The projected resale values and operating and maintenance costs for the challenger and the defender are shown in the accompanying table on a year-by-year basis. If the before-tax MARR is 15%, when should the old assembly machine be replaced? Use the following data table for your analysis. Problem 1 Challenger Defender Year Market Value O&M Costs Market Value O&M Costs 0 $42,500 ? $25,000 ? 1 31,000 $10,000 17,000 $14,000 2 25,000 12,500 ? ? Problem 1 A steam generation system at a biomass-fueled power plant uses an electrostatic precipitator (ESP) to clean its gaseous effluents. The power plant has consistently made use of the same type of ESP over the past several years. The installed cost of a new ESP has been relatively constant at $80,000. Records of operation and maintenance expenses indicate the following average expenses per year as a function of the age of the ESP. The MVs of the ESP are also reasonably well known as a function of age. Year 1 2 3 4 5 O&M expense $30,000 $30,000 $35,000 $40,000 $45,000 Market value 60,000 50,000 40,000 25,000 12,500 Determine the best time to replace the ESP if the MARR is 15% per year. Problem 2 Problem 2 In a replacement analysis for a vacuum seal on a spacecraft, the following data are known about the challenger: the initial investment is $12,000. there is no annual maintenance cost for the first three years, however, it will be $2,000 in each of years four and five, and then $4,500 in the sixth year and increasing by $2,500 each year thereafter. The salvage value is $0 at all times, and MARR is 10% per year. What is the economic life of this challenger? 500 q You borrow $10,000 from a bank for three years at an annual interest rate, or annual percentage rate (APR), of 12%. Monthly payments will be made until all the principal and interest have been repaid. (Problem) a. What is your monthly payment? b. If you must pay two points up front, meaning that you get only $9,800 from the bank, what is your true APR on the loan? Problem The price of oil in 2005 was $67 per barrel. "This price is still lower than the price of oil in 1981" says a government publication. If inflation has averaged 3.2% per year from 1981 to 2005, what was the price per barrel of oil in 1981? Problem 1 Suppose that, in Plan 1 of Table, $8,500 of the original unpaid balance is to be repaid at the end of months two and four only. How much total interest would have been paid by the end of month four? Problem 2 Compare the interest earned by P dollars at i %per year simple interest with that earned by the same amount P for five years at i % compounded annually. Problem 3 You borrow $200 from a family member and agree to pay it back in six months. Because you are part of the family, you are only being charged simple interest at the rate of 1% per month. How much will you owe after six months? How much of this is interest? Problem 4 Mr. Smith has saved $1,200 each year for 20 years. A year after the saving period ended, Mr. Smith withdrew $7,500 each year for a period of five years. In the sixth and seventh years, he only withdrew $4,500 per year. In the eighth year, he decided to withdraw the remaining money in his account. If the interest rate was 8% per year throughout the whole period, what was the amount he withdrew at the end of the eighth year? Problem 5 A lump-sum loan of $5,000 is needed by Chandra to pay for college expenses. She has obtained small consumer loans with 12% interest per year in the past to help pay for college. But her father has advised Chandra to apply for a PLUS student loan charging only 8.5% interest per year. If the loan will be repaid in full in five years, what is the difference in total interest accumulated by these two types of student loans? Problem 6 Suppose that, in Plan 1 of Table, $8,500 of the original unpaid balance is to be repaid at the end of months two and four only. How much total interest would have been paid by the end of month four? Problem 7 Compare the interest earned by P dollars at i %per year simple interest with that earned by the same amount P for five years at i % compounded annually. Problem 8 You borrow $200 from a family member and agree to pay it back in six months. Because you are part of the family, you are only being charged simple interest at the rate of 1% per month. How much will you owe after six months? How much of this is interest? The world's largest carpet maker has just completed a feasibility study of what to do with uic 16,000 tons of overruns, rejects, and remnants it produces every year. The company's CEO launched the feasibility study by asking, why pay someone to dig coal out of the ground and then pay someone else to put our waste into a landfill? Why not just burn our own waste? The company is proposing to build a $10-million power plant to burn its waste as fuel, thereby saving $2.8 million a year in coal purchases. Company engineers have determined that the waste-burning plant will be environmentally sound, and after its four-year study period the plant can be sold to a local electric utility for $5 million. (Problem 1) a. What is the IRR of this proposed power plant? b. If the firm's MARR is 15% per year, should this project be undertaken? Problem 1 A large induced-draft fan is needed for an upgraded industrial process. The motor to drive this fan is rated at 100 horsepower, and the motor will operate at full load for 8,760 hours per year. The motor's efficiency is 90%. Because the motor is fairly large, a demand charge of $90 per kilowatt per year will be incurred in addition to an energy charge of $0.08 per kilowatt-hour. If the installed cost of the motor is $3,500, what is the present worth of the motor over a 10-year period when the MARR is 15% per year? (Problem 2) Problem 2? Josh Ritchey has just been hired as a cost engineer by a large airlines company. Josh's first idea is to quit giving complimentary cocktails, wine, and beer to the international flying public. He calculates this will save 5,000,000 drinks per year, and each drink costs $0.50, for a total of $2.5 million per year. Instead of complimentary drinks, Josh estimates that the airlines company can sell 2,000,000 drinks at $5.00 per drink. The net savings would amount to $12.5 million per year! Josh's boss really likes the idea and agrees to give Josh a lumpsum bonus now equaling 0.1 % of the present equivalent worth of three years of net savings. If the company's MARR is 20% per year, what is Josh's bonus? On a $200,000, 30-year fixed mortgage, the monthly payment will be approximately how much when the nominal interest rate on the mortgage is 4.2%? (a) $568 (b) $980 (c) $918 (d) $1,000 (e) $895
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