A system using R-404a has an evaporation temperature of 20°F. If the line length is 100 ft and a 7/8 in line is used, what is the maximum capacity of the system?
A) 2 tons B) 3 tons C) 2.5 tons D) 1.5 tons
A
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Why is it important to maintain a minimum head pressure in the condenser?
a. So the TEV will operate properly. b. To maintain the proper condenser subcooling. c. So the liquid refrigerant will not flash off in the liquid line.
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List two types of pressure plates.
What will be an ideal response?
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Which of the following is a connection that has elements touching each other at one terminal with no other element connected at the same point?
A. Node B. Branch C. Series D. Circuit
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The practice of starting a new business or organization in response to a recognized need or opportunity is called:
A. partnership B. business sense C. entrepreneurship D. ethics
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