A viscosity index reflects _____

a. the lubricating ability of a fluid
b. the speed at which a liquid flows
c. how thick a fluid is at high temperatures
d. the changes in fluid viscosity at different temperatures


d

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Water with a pH much lower than 7.0 is ____ and can produce corrosive effects on metal equipment and pipes

A) acidic B) alkaline C) neutral D) flavored

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Japan’s vast natural resources has helped make that country a significant economic power

Indicate whether the statement is true or false.

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Structure R contains neurons that are involved with



A) initiating voluntary motor impulses.
B) abstract thinking.
C) the control of autonomic functions.
D) emotions.
E) the interpretation of speech.

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Nitrogen changes from a liquid to a vapor at ____.

A. 212°F B. -21°F C. -320°F D. -479°F

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