The effect of oxytocin lasts about _____ to _____ minutes, and milking must be completed in that time

frame.



a. 1, 3 c. 5, 7
b. 3, 5 d. 7, 9


C

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If the soil pH is too high or alkaline, _____ or iron sulfate may be used to lower the pH

A) calcium B) lime C) sulfur D) nitrogen

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____________________ instruments register pressures above and below atmospheric pressure.

Fill in the blank(s) with the appropriate word(s).

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Problem 8.20 EP Electric has identified two new methods to treat its cooling water. Alternative I (for inflow) would treat the raw water with a conventional reverse os­mosis system so that the cycles of concentration could be increased from 5 to 20. This will result in water cost savings of $360,000 per year and chem­ical cost savings of $56,000 per year. The initial cost of the equipment will be $2.3 million with an operating cost of $125,000 per year. Alternative B (for blowdown) will treat the cooling tower blowdown water using a high-pressure seawater reverse osmosis system to recover most of the water that is sent to an evapo­ration pond. This option will result in water sav­ings of $270,000 per year. The cost of the system will be $1.2 million with an operating cost of

$105,000 per year. Assuming one of the two methods must be installed, determine which is preferred on the basis of the incremental ROR value using MARR of 5% per year, which is a typically low return expected of government proj­ects. Use a 10-year study period with no salvage value for either system. (Note: See Problem 8.41 for more on this situation.) Solution 8.41 In Problem 8.20, two methods of cooling water treatment are analyzed. These are revenue alternatives which generate annual savings against their costs. (a) Perform the complete procedure for incremental ROR analysis for revenue alterna­tives to determine which method to select at MARR = 5% per year. (b) If a MARR of 8% per year were required, what recommendation would you make?

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Since many new replacement refrigerants are being used throughout the industry, a technician should rely on system temperatures to ease the troubleshooting process.

Answer the following statement true (T) or false (F)

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