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Question:
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Which of the following heating method directly heats objects in the room, but does not directly warm the room air.
Radiant heating
Antifreeze ______ solution is specially formulated for hot water heating systems
ethylene glycol
In heat pump, a _____ absorbs heat from the outdoor air and transfers it to indoor:
Condenser
Mid-efficiency oil furnaces can have seasonal efficiencies of approximately ______:
85%
A correct draft is essential for efficient burner operation
True
Fire tube boilers, systems are simple and easy to construct and are generally used in low-pressure applications:
The temperature at which wax crystals begin to form in oil is ______
Cloud point
______ reading refers to the draft within the chimney piping:
Breech draft
Replacing the conventional burner with a flame retention head burner will save _____ on the fuel:
10%-15%
Aluminum tubing or castiron fittings should be used for the main gas line.
False
LPG has a specific gravity of ______:
1.5
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