Which part will need to be cleaned if there is excessive soot buildup?
A) chimney connector B) bypass plug C) suction line D) oil tank
A
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Wheat flour contains a high percentage of a substance called ____________________ that causes the flour particles to stick together when moisture is added
Fill in the blank(s) with correct word
How can an air-source heat pump heat when the outdoor temperature is cold?
A) Air-source heat pumps only use the outdoor air in the cooling season. B) All heating is accomplished with electrical resistance heaters, so the air temperature is irrelevant. C) All molecules contain some heat until they reach absolute zero (-460°F). D) The friction of the air passing over the outdoor coil raises the temperature.
Why are steam boilers used in applications requiring a large heating capacity?
A) Because steam pumps operate more efficiently than hot water pumps B) Because it takes 10 times more heat to boil a pound of water than to change its temperature 100°F C) Because a pound of steam takes up less space than a pound of water D) Because hot water boilers cannot maintain a temperature over 212°F
What makes robots potentially dangerous to humans are their flexibility and range of motion.