In the accompanying figure, the item identified as number 2 is a wide, dark line that would probably be drawn with a ____ lead pencil.
A. 0.3 or 0.5
B. 0.5 or 0.7
C. 0.7 or 0.9
D. 0.9 or 1.1
Answer: C
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Factory-built fireplaces producing gases with a temperature above ____°F at the chimney entrance must meet UL 959.
A. 540 B. 750 C. 820 D. 1000
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On what does Type I EPA certification allow a service technician to work ?
What will be an ideal response?
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To avoid costly damage to lumber and plywood, they must be _____
a. ordered in small quantities b. properly stored and handled c. stored off-site d. kept in a locked building
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The temperature on the Celsius scale where all molecular activity stops is ____.
A. -273°C B. -272.6°C C. -277.8°F D. -274.1°C
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