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diamonddiva007 diamonddiva007
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6 years ago
The first law of thermodynamics states that:
 
  A) the molecular energy band is directly proportional to the thermal activity of the molecule.
  B) All objects contain some energy.
  C) Energy cannot be created or destroyed.
  D) Whenever energy is created, an equal quantity of energy must be destroyed to maintain thermal equilibrium.

 Q. 2

When the heat load on the evaporator increases, the automatic expansion valve:
 
  A) Opens to feed more refrigerant.
  B) Closes to keep the pressure from increasing.
  C) Sends a signal to the electronic control board indicating the change.
  D) Does nothing because AEVs are not modulating devices.

 Q. 3

The system capacity of an air conditioner with a fixed metering device:
 
  A) Increases when the indoor wet bulb temperature rises.
  B) Is at its maximum when the indoor and outdoor temperatures are the same.
  C) Decreases when the indoor wet bulb temperature rises.
  D) Is fixed regardless of the indoor wet bulb temperature.
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wasgood27wasgood27
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6 years ago
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#2
6 years ago
found this very helpful thank you
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