La organización u organizaciones que prueban y califican los disyuntores es/son:
a. IEEE.
b. OSHA y NEMA.
c. CSA y UL.
d. UL y NEMA.
c. CSA y UL.
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Wood or steel frames installed between inner and outer wall forms to create window or door openings are called _____.
a. spacers b. holdouts c. bucks d. lintels
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The plug valve is used to _____.
a. start and stop flow b. regulate flow c. relieve pressure d. regulate the direction of flow
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The preferred method for checking for damaged conduit before pulling cable is _____.
a. a visual inspection of the conduit b. using a vacuum powered fishing system c. using a conduit swab to clear debris d. performing a test pull
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The ____________________ type of transmission signal is used in applications where a spark may cause an explosion.
Fill in the blank(s) with the appropriate word(s).
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