Three-way catalytic converters use ____, or sometimes palladium, as a catalyst for their reduction portion (the part that controls NOX).
A. silicon
B. lead
C. rhodium
D. tungsten
Answer: C
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A(n) ___________________ is the basic unit of a PV module.
Fill in the blank(s) with the appropriate word(s).
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Another word for a plumb bob is a _____
A) hammer B) plummet C) chisel D) rip saw
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Which light cannot be seen?
A. ?Ultraviolet B. ?Infrared C. Visible D. Spectral
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Up to _________ percent of U.S. jobs are directly related to agriculture.
Fill in the blank(s) with the appropriate word(s).
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