Which type of duct should NOT be allowed to pass through fire-rated walls?
A) Galvanized sheet metal duct B) Flexible duct connector
C) Ductboard D) Flexible duct
B
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The size indicated for the diameter of copper tubing used for plumbing is the ____.
A. inside diameter B. outside diameter C. wall thickness D. None of the above.
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A(n) ____________________ is used to measure the amount of O2 in flue products.
Fill in the blank(s) with the appropriate word(s).
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At what temperature is the catalytic converter fully effective?
A) 1000°F B) 500°F C) 420°F D) 100°F
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What are the three datum planes related to cylindrical parts?
What will be an ideal response?
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