A condensing oil furnace operates at a higher efficiency because part of the heat output is ____.
A. sensible heat
B. latent heat
C. superheat
D. sub-cooling
Answer: B
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A ring of mulch around the base of a tree can protect it from damage during mowing
Indicate whether the statement is true or false
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Which of the following is a joining process?
A. welding B. casting C. molding D. broaching
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Hot water rising and colder water sinking is the _____ .
A. ?closed-loop system B. ?operational effect C. ?thermosiphon effect D. ?open-collector system
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_____ measures the heat that the window loses by conduction.
A. Solar heat gain coefficient (SHGC) B. U-factor C. Visible transmittance (VT) D. Air infiltration
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