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Engineering
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Engineering Economy Study Set 1
Quiz 2: Cost Concepts and Design Economics
Path 4
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Question 1
Essay
A manufacturing plant is planning to replace outdated equipment with more energy- efficient and environmental- friendly equipment. Two models are under consideration. Model A is sold for $159,000 and can produce at an optimum speed of 78 unit/hour. Model B is sold for the same price, but can produce at an optimum speed of 76 unit/hour. Model A requires 6 hours of maintenance for every 4300 units produced, while Model B requires 5 hours of maintenance for every 3300 units. The maintenance cost for both models is $100 per hour. The variable operating cost is $340 per hour for Model A and $290 per hour for Model B. Due to obsolete parts, there is a sunk cost of $2700 for model A and $1900 for Model B . If the price of the product is $150 per unit and the company expects to sell 145,000 units each year, which model should be selected?
Question 2
Short Answer
A garment manufacturing company makes 380,000 articles per year. Each article takes 95 minutes of direct labor at the rate of $9.00 per hour. The overhead costs are $7.50 per direct labor hour. The average price of the finished product is $80 per article. A new machine will reduce the direct labor hour by 15 minutes per article. What is the maximum amount the company should pay for the new machine if it wants to break even by the end of the first year?
Question 3
Essay
The annual fixed cost for an inspecting and profiling web controller manufacturing company are $44,000, and the variable costs are $38 per unit. If the selling price per unit is p = 495 - 0.57X, what is the company's range of profitable demand?
Question 4
Short Answer
A headhunter company has fixed costs of $57,000 per month and variable costs of $1000 per customer account. The company currently charges $1150 per month for each account and has 38,000 accounts. It wants to raise the monthly fee to $1160.55 to cover enhanced features such as a new web interface and a newly acquired database, which increases the variable cost by 9 percent. What is the new breakeven point in number of accounts?
Question 5
Essay
You are deciding between three types of water heaters. The associated costs are shown below. The annual cost of operation for gas and oil heaters is estimated by 365 x 41045/EF x Fuel Cost per Btu, and the annual cost of operation for electric water heaters is estimated by 365 x 12.03/EF x Electricity Cost per kWh. The selected heater will be used for only one year and then sold at the market value. Which alternative should be selected?
Question 6
Essay
The cost for operating a commercial truck is knv1/2, where k is a constant of proportionally, v is velocity in miles per hours, and n is the trip length in miles. It is estimated that at 85 mph, the average cost of operation is $52 per mile. The truck owner wants to minimize the cost of operation, which needs to balance against the cost of delays and unscheduled maintenance, which is assumed to be $10 per hour. What is the optimum velocity needed to minimize the total costs?
Question 7
Short Answer
The annual fixed cost for a light fixture manufacturing company are $38,000, and the variable costs are $40 per unit. If the selling price per unit is p = 485 - 1.395X, what is the optimum demand for a light fixture?