Dry ice is composed of ____.

A. liquid nitrogen
B. liquid carbon dioxide
C. solidified carbon dioxide
D. solidified ammonia


Answer: C

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a. mechanical type b. crimp type c. split-bolt type d. molded type

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A raindrop strikes the Earth at about ____ miles per hour

A) 5 B) 2 C) 20 D) 50

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What are the by-products (emissions) from a fuel cell?

A) CO2 B) Nonmethane hydrocarbon C) CO D) Water

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Which one of the following files is NOT a file structure used by the SLC 500?

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