Why is it a bad idea to overtighten rod bolts?
What will be an ideal response?
Overtightening rod bolts can cause them to fail during deceleration. This is when the load is on the bolt instead of on the rod.
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A large water utility is planning to upgrade its SCADA system for controlling well pumps, booster pumps, and disinfection equipment so that everything can be centrally controlled. Phase I will reduce labor and travel costs by $28,000 per year. Phase II will reduce costs by an additional $20,000 per year, that is, $48,000. Phase I savings should occur in years 0, 1, 2, and 3 and phase II savings should occur in years 4 through 10. Let i = 8% per year.
(a) Using a spreadsheet determine the present worth of the upgraded system for years 1 to 10. (b) The utility General Manager had hoped for a present worth of at least $400,000. Determine the interest rate at which this would be correct.
Which of the following statements concerning applications or capabilities of soil moisture measuring devices is (are) true for the use of a drying oven and balance?
A) requires "destructive sampling" for each measurement B) good to turn on automatic irrigation at -5.0 kPa C) used to turn on irrigation when soil moisture potential reaches -20.0 kPa D) gives same reading for loamy sand and silt loam if both contained 15% moisture E) both A and D
If a 27 m H inductor has a reactance of 5.5 k?, the frequency equals ________
A) 3.24 kHz B) 32.4 kHz C) 324 Hz D) 932 Hz
What is the maximum amount of energy released when a 10-lbm sample of coal from McDowell, West Virginia is burned? Also calculate the amount of energy released when 15 ft3 of natural gas from Oklahoma is burned.
The amount of energy released when a 10 lbm sample of Coal from McDowell, West Virginia is burned: