The two pressures that push to close a thermostatic expansion valve are the ____________________ pressure and the ____________________ pressure.
Fill in the blank(s) with the appropriate word(s).
spring, evaporator
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Which of the following statements about liquid-liquid equilibrium is true?
A. When a binary mixture is immiscible, it means that the composition of one of the liquid phases is almost all the first component, while the composition of the other liquid phase is almost all of the second component. B. When the activity coefficient of one of the components is above 10, a miscibility gap will exist. C. When the A parameter for the 1-parameter Margules equation is greater than 1, it means a miscibility gap will be predicted for that system. D. At low temperature, the Wilson equation will predict a miscibility gap for alkane + alcohol systems. E. None of the above are true.
Why are electric motors often preferred?
A. Reliability B. Ease of repair C. Low maintenance cost D. All of the above
In a technical report, all figures must be numbered and have a descriptive title.
a. True b. False
Of the following, which depends most upon its tongue to grasp vegetative material and
shear it against its lower incisors? A. cattle B. horses C. sheep