U.S. producers have faced which of the following problems when trying to raise frogs?
a. Frogs are very territorial.
b. Frogs will only eat food that is alive.
c. Almost all predators that inhabit areas near water eat frogs.
d. All answers
D
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Which of the following best explains why a vacuum has to be pulled for a considerable time period when evacuating an A/C system?
A. vacuum pump first lowers the boil point of moisture, then extracts the vapor B. vacuum pump takes longer to pull out liquid moisture C. vacuum is less effective than pressure at expelling moisture D. system pump functions more effectively when hot
What is the process of putting an inert gas, usually nitrogen, into the vapor space above the liquid in a tank to prevent air leakage into the tank?
A) Blanketing B) Floating roof C) Articulated drain D) Foam chamber
What capacity control method is popular with open and semi-hermetic reciprocating compressors?
a. Slide valves b. Cylinder unloading c. Plug valves d. Throttling unloaders
As a result of the Morrill-Land Grant Act, each _____ in the United States was given land to develop a land-grant institution
a. state b. county c. city d. neighborhood