What efficiency advantage do water source heat pump systems have over air source heat pump systems?
A) It takes less horsepower to pump water than air
B) They transfer heat to water that is warmer in the winter and cooler in the summer than the surrounding air temperature
C) Heat has more affinity for water than air
D) Water is a more efficient refrigerant than either R-22 or R-410A
B
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Fill in the blank(s) with the appropriate word(s).
Dielectric heating is based on the principle of ____.
A. resistance B. forced air C. inductance D. capacitance
If the pH value is below 6.0, ground seashells should be added
Indicate whether the statement is true or false
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a. agricultural b. old c. timely d. financial