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
E
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¿Cuál de las siguientes afirmaciones acerca de las responsabilidades de un empleado es correcta?
a. Una vez que haya finalizado el entrenamiento inicial, no debe tomar más clases. b. Cuando se le ha otorgado una responsabilidad, debe realizarla sin esperar a que se lo digan. c. No hay problema si retira material de la obra para uso personal; todo el mundo lo hace. d. No hay problema si llega tarde al trabajo, siempre que recupere las horas ese mismo día.
(PE) Water for Semiconductor Manufacturing Case It is anticipated that the needs for UPW (ultrapure water) at the new Angular Enterprises site will continue for a long time, as much as 50 years. This is the rationale for using capitalized cost as a basis for the economic decision between desalinated seawater (S) and purified groundwater (G). These costs were determined to be CCS = $?53.58 million and CCG = $?48.91 million.
Groundwater is the clear economic choice. Yesterday, the general manager had lunch with the president of Brissa Water, who offered to supply the needed UPW at a cost of $5 million per year for the indefinite future. It would mean a dependence upon a contractor to supply the water, but the equipment, treatment, and other costly activities to obtain UPW on site would be eliminated. The manager asks you to make a recommendation about this seemingly attractive alternative under the following conditions at the same MARR of 12% per year as used for the other analyses: (a) The annual cost of $5 million remains constant throughout the time it is needed. (b) The annual cost starts at $5 million for the first year only, and then increases 2% per year. (This increase is above the cost of providing UPW by either of the other two methods.)
Technician A says that solvents currently in use in a parts washer must always be labelled. Technician B says that Safety Kleen is a vendor that recycles and disposes of used solvent. Which technician is correct?
A) Technician A B) Technician B C) Both technicians D) Neither technician
In a direct digital control system the primary controller is the
A) bleed type thermostat. B) voltage amplifier. C) HVACR computer. D) Wheatstone bridge.