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- The Worthington Gear Company installed a bank of 10 robots about three years ago. The robots greatly in-creased the firm’s labor productivity, but recently attention has focused on maintenance. The firm does no pre-ventive maintenance on the robots because of the variability in the breakdown distribution. Each machine hasan exponential breakdown (or interarrival) distribution with an average time between failures of 200 hours. Eachmachine hour lost to downtime costs $30, which means that the firm has to react quickly to machine failure.The firm employs one maintenance person, who needs 10 hours on average to fix a robot. Actual maintenancetimes are exponentially distributed. The wage rate is $10 per hour for the maintenance person, who can be putto work productively elsewhere when not fixing robots. Determine the daily cost of labor and robot downtime.A wheel tractor-scraper is carrying a 50,000 lb load while operating on a level grade. Assume no power derating is required for equipment condition, altitude, and temperature. What minimum value of coefficient of traction between the tractor wheels and the traveling surface is needed to overcome an equivalent rolling resistance of 12%? For the fully loaded condition 40% of the weight is distributed to the drive axle. Operating weight of the scraper when empty is 70,000 lb.6.4 (5 pts) A wheel tractor-scraper is carrying a 50,000 lb load while operating on a level grade. Assume no power derating is required for equipment condition, altitude, and temperature. What minimum value of coefficient of traction between the tractor wheels and the traveling surface is needed to overcome an equivalent rolling resistance of 12%? For the fully loaded condition 40% of the weight is distributed to the drive axle. Operating weight of the scraper when empty is 70,000 lb.TPM is the integration of preventive and predictive maintenance to avoid emergency maintenance Select one: True False
- Karim rents storage space to college students who go home for the summer but do not want to haul all of their property home and back. The business is profitable during the summer months, but when the storage space is unoccupied in the off-season, Karim loses money. Which of the following characteristics of service is most likely the source of his problem? * 019 O Intangibility O Variability Perishability InseparabilityDetermine the optimum preventive maintenance frequency for each of the pieces of equipment if breakdown time is normally distributed: (Round "Probability Ratio" to 4 decimal places, and all other answers to 2 decimal places. Negative values should be indicated by a minus sign.) Use Table. Equipment. A201 B400 C850 Equipment A201 B400 CB50 Equipment Average Time (days) between Breakdowns A201 B400 C850 20 30 45 Preventive Maintenance Cost Click here for the Excel Data File: $330 $230 $580 Probability Ratio Standard Deviation 3 Breakdown Cont $2,230 $3,530 $4,825 Interval (days)Assuming that you were hired as process engineer in a manufacturing company. Upon reporting for work, you noticed that some chain drive equipment are having too much slack. Adjusting the slack by stopping the equipment would be detrimental to the achievement of production target. You decided to have it corrected when the company goes into its scheduled preventive maintenance shutdown. What improvements would you do to correct and prevent this problem from happening? Explain your answer.
- Suppose that a (pA = 0.1, ps = 0.2, A = 1 min)-BSSQ Q is operating in steady state. Calculate E[|Q(x)|*].A bar of 12 mm diameter gets stretched by 3 mm under a steady load of 8 kN. What stress would be produced in the bar by a weight of 800 N, which falls through 80 mm before commencing the stretch-ing of the rod, which is initially unstressed. Take E = 200 kN/mm2.Which of the following is the best choice when selecting a belt drive to transmit power at a constant angular velocity ratio? OA. Oval belt drive OB. Flat belt drive OC. V-belt drive OD. Round belt drive O E. Timing belt drive
- Each breakdown of a graphic plotter table atAirbus Industries costs $50. Find the expected daily breakdown cost, given the following data:. An 18 V source has an internal resistance of 70. If a load resistance of 33 is connected to the voltage source, the load power, PL, is A OW B 1 W C 175 mW D 18 mWLower control limit must by be defined as a value less than an upper control limit. a. True b. False