Speeds up to ____ rpm are used in centrifugal compressors.
A. 15,000
B. 20,000
C. 25,000
D. 30,000
Answer: D
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When the piping system must be supported from underneath a pipe, a Type _____ support is used.
a. A b. E c. F d. G
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We need less water today than ancient people did
Indicate whether the statement is true or false
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When the source of contamination can be precisely located, we refer to it as ____ source pollution
A) diffuse B) significant C) Nonpoint D) point
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During the Stone Age, it is believed that linen was used for making:
a. Clothing c. Fishnets b. Bladders for carrying water d. Blankets
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