A heat pump defrost control must do three things: Turn on auxiliary heat, turn off the condenser fan motor, and:
A) Turn off the indoor blower fan. B) Turn off the compressor.
C) Deactivate the thermostat. D) Shift the reversing valve from heat to cool.
D
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Explain what impact strength is and give at least one example of the impact strength of a common material.
What will be an ideal response?
_____ corrosion occurs between two different types of metal that are placed together or within the same corrosive environment.? ?
Fill in the blank(s) with the appropriate word(s).
____ grids, strong enough to support vehicle traffic, installed over a gravel sub base and filled with vegetation are another porous paving option.
A. Plastic-covered fiberglass B. Fiberglass-covered plastic C. Plastic D. Fiberglass
The temperature of superheated refrigerant is
A. at its boiling point. B. above its boiling point. C. below its boiling point. D. none of the above.