We Problem 11-6 (book/static) Question Help An area can be irrigated by pumping water from a nearby river. Two competing installations are being considered. The MARR is 12% per year and electric power for the pumps costs $0.06 per kWh. Recall that 1 horsepower (hp) equals 0.746 kilowatts. a. At what level of operation hours per year would you be indifferent between the two pumping systems? If the pumping system is expected to operate 2.000 hours per year, which system should be recommended? b. Assuming 2,000 hours of operation perform a sensitivity analysis on the efficiency of Pump A. Over what range of pumping efficiency is Pump A preferred to Pump B? Operating load on motor Efficiency of pump motor Cost of installation Market value Useful life Pump 6 in. System 15 hp 0.60 $2,410 $80 8 years Pump B 8 in. System 10 hp 0.75 $4,820 8 years Click the icon to view the interest and annuity table for discrete compounding when the MARR is 12% per year. a. The two pumping systems are identical if the level of operation is 941 hours per year. (Round to the nearest whole number.) Calculate the EUAC value for Pump A if the pumping system is expected to operate 2.000 hours per year. EUACA(12%) = $ 2717 (Round to the nearest dollar.) Calculate the EUAC value for Pump B if the pumping system is expected to operate 2,000 hours per year. EUACg (12%) = $ 2164 (Round to the nearest dollar.) If the pumping system is expected to operate 2,000 hours per year, Pump B should be recommended b. Pump A is preferred to Pump B if the pumping efficiency of Pump A is over %. (Round to one decimal place.)