What causes soot buildup?
What will be an ideal response?
Incomplete combustion from improper installation or poor maintenance.
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What position are the unit installation valves in when the unit is shipped?
What will be an ideal response?
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Some cicadas live in the soil for as long as 50 years
Indicate whether the statement is true or false
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The outside of a soldered joint looks complete, but when it is cut open for testing the solder has not flowed into the joint. What may have happened to cause this?
A) The pipe was overheated. B) The pipe was heated before the joint. C) The wrong type of solder was used. D) The joint was heated before the pipe.
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The binary equivalent of hexadecimal C0B is ________
A) 110100001011 B) 110000001001 C) 110000001100 D) 110000001011
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