How can the water flow through a geothermal system be determined?
A) By using an clamp-on water flow meter
B) By measuring the pressure drop across the coaxial coil and comparing it to the manufacturer's chart
C) By comparing the waterflow to the refrigerant pressure chart
D) By reading the display on the heat pump touchscreen control
B
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Tensile strength is determined by ____.
A. dividing the maximum load by the original cross-sectional area of the specimen at the middle B. multiplying the maximum load by the original cross-sectional area of the specimen at the middle C. dividing the original cross-sectional area by the maximum load D. the diameter squared times 0.785
Overweight, oversized loads:
a. Require special permits. b. Can only be driven at daylight. c. Must be accompanied by the police.
A short circuit has ____ resistance.
A. very small B. infinite C. negative D. zero ohms
The __________ feedback loop of a vector drive is used to control the magnitude of the stator current.
A. speed B. velocity C. current D. position