How can a non-toxic, non-flammable refrigerant still be dangerous when released in a confined space?
A) A chemical reaction with the air can create a toxic gas.
B) A chemical reaction with the air can create a flammable byproduct.
C) The space temperature can quickly drop below freezing.
D) The refrigerant can replace the air, causing suffocation.
D
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An engine fails to reach normal operating temperature. Which is the most likely fault?
A) Wrong antifreeze coolant B) Defective thermostat C) Low coolant level D) Partially clogged radiator
Why did the development of a technology for the mass production of books have an enormous intellectual impact on Europe?
a. New trades and professions emerged, such as typesetters, books sellers, and book peddlers. b. The fixed nature of print made the post-Gutenberg world more intellectually exact. c. Stationers of the medieval university replaced the scriptorium of the medieval monastery as the center of intellectual exchange. d. Latin and Greek replaced the vernacular languages as the primary means of scholarly communication.
Which of the following is the term that defines when two signals at different frequencies are combined in a nonlinear device?
A. Aliasing B. Mixing C. Foldover distortion D. Fluctuating
Which of the following is actually being measured when a vacuum is measured in microns?
A) The difference between the atmospheric pressure and mercury B) The full atmospheric pressure at sea level in the system C) The amount of pressure that remains in the system D) The amount of pressure that has been removed from the system