The self-induced voltage across an inductance is produced by a change in _____.
a. current with respect to time
b. resistance with respect to time
c. capacitance with respect to time
d. voltage with respect to time
a. current with respect to time
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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
In a direct expansion chiller:
A) The water and refrigerant are mixed in the shell. B) The water is in the shell and the refrigerant is in the tubes. C) The water is in the tubes and the refrigerant is in the shell. D) The water and refrigerant are in separate tubes with a heat transfer medium in the shell.
Technician A says that electric tools are the technician’s tool of choice because they are more lightweight than air tools. Technician B says battery-operated tools offer an improved portability and versatility. Who is correct?
A. Technician A only B. Technician B only C. Both Technicians A and B D. Neither Technician A nor B
Plumbing connections can be soldered at temperatures between _____
a. 100°F and 300°F b. 200°F and 600°F c. 400°F and 800°F d. 600°F and 1,000°F