How does the heating-cycle charge compensator differ during the heating and cooling cycle?
A) The temperature of the coolant is lower during the cooling cycle.
B) Most of the refrigerant leaves during the cooling cycle.
C) Most of the refrigerant leaves during the heating cycle.
D) Less coolant needs to be circulated during the heating cycle.
B
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To the left of the Txy plot are five overall compositions, pressures, and temperatures for a mixture of R-245fa (1) + isopentane (2). For each combination, list the equilibrium phases, what they are (LLE, VLE, etc) and what are the compositions (in terms of mole fractions) of each of the equilibrium phases.
Z1 = 0.8; P = 0.1 bar; T = 232K
Without _________________________ voltage, there is no low voltage.
Fill in the blank(s) with the appropriate word(s).
Shortages of qualified technicians have been reported in the United States and _______
A) China B) Canada C) Europe D) All of the above E) None of the above
A wye-delta transformer has a primary line voltage of 7200 V and a secondary line voltage of 480 V. What is the turns ratio?
A. 8.66:1 B. 9: 66 C. 10:15 D. 15:1