What device is used in a home or business to capture heat from or release heat into the ground?
What will be an ideal response?
Geothermal heat pump.
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A(n) _____ is a weld for the purpose of holding parts in proper alignment until final welding can take place.? ?
A. alignment weld? B. electrode weld? C. tack weld? D. line weld?
Two methods to control newly discovered poisonous weeds in bar-ditches on the sides of county roads in New Farmendale are under consideration. Method A involves use of a 20-year life lining at an initial cost of $14,000 and an annual maintenance cost of $3 per kilometer (km). Method B involves spraying a chemical that costs $40 per liter. One liter will treat 8 km, but the treatment must be applied four times per year. In determining the number of km per year that would result in breakeven, the variable cost for method B is closest to: (choose one)
(a) $5 per km (b) $15 per km (c) $20 per km (d) $40 per km
A downstream oxygen (O2) sensor is reading the same as the upstream O2 sensor. What does this indicate?
A. The downstream sensor is defective and must be replaced. B. The converter has low efficiency. C. The upstream sensor is not working properly. D. The converter is working properly.
A potentiometer is a __________ feedback device.
A. position B. velocity C. both a and b