Safety glasses must be _________________ as safety glasses.

A. designed
B. listed
C. worn only
D. a and b


Answer: D

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Las barreras de vapor DEBEN instalarse en

a. cualquier tubería o equipo que funcione por debajo de la temperatura ambiental. b. tuberías calientes. c. servicios de calorífugado con vapor. d. protección personal.

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The pressure plate assembly is also called the ____________________ assembly.

Fill in the blank(s) with the appropriate word(s).

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When using a DMM, the black lead usually goes in which port?

A) VDC B) COM C) 10A D) None of these

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In an ecosystem with a complete vegetation cover (canopy), competition among plants will most likely be for:

A. carbon dioxide. B. nutrients. C. light. D. water.

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