What is the primary difference between air cooled condensers on standard efficiency systems and air cooled condensers on high efficiency systems?
A) The coil size is decreased to raise the head pressure and increase the temperature difference.
B) The number of fins per inch are reduced to reduce the restriction to airflow.
C) The condenser coils are made from steel instead of copper or aluminum.
D) The coil size is increased to increase the heat transfer area.
D
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A. A only B. B only C. Both A and B D. Neither A nor B
What pressure is used to charge Cummins CELECT Plus injectors?
A. they are under suction B. 78 psi C. 150 psi D. 285 psi
How would you create a chart of accounts for a project cost ledger?
What will be an ideal response?
The freezing point of substances:
A) Is the change of state of a substance from a liquid to a solid at a given pressure and temperature when heat is removed. B) Is 32°C. C) Is 0°F. D) Never considers pressures or temperatures.