A thermostatic expansion valve controls refrigerant flow to the evaporator based on ____.
A. rate of liquid vaporization
B. evaporator suction line superheat
C. external equalizer pressure
D. all of the above
Answer: B
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In a fuel cell, the _____________ isolates the reactions between anode and cathode, not allowing the electrons to pass, but allowing the ions to pass.
Fill in the blank(s) with the appropriate word(s).
Catherine the Great enlarged Russia’s empire through a key series of victories against which rival regional power?
a. Austria b. Sweden c. Prussia d. the Ottoman Empire
Of all the problems facing the Byzantine Empire in the eleventh century, the greatest problem for the empire was the
a. adoption by the Kievan Rus of the Eastern Orthodox faith. b. death of emperor Basil II. c. Great Schism of the universal church. d. rise of the Seljuk Turks.
A wall assembly's fire rating is stated in terms of _____
a. thickness b. time c. flammability d. temperature