Expanding the electrical service to install a heat pump can potentially be avoided by using _____.
a. using DC-powered electric heaters
b. a fossil-fuel furnace for supplemental heat
c. low-voltage equipment
d. fewer compressors
b. a fossil-fuel furnace for supplemental heat
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Young horses should never graze with older horses
Indicate whether the statement is true or false.
Technician A says that HID headlamps convert about 80% of the electrical energy they consume into light energy. Technician B says that halogen lights use more energy but produce a 20% brighter beam than equivalent HID beams. Who is correct?
A. Technician A only B. Technician B only C. Both A and B D. Neither A nor B
Antifreeze should be used on the cooling tower even if the plan is to drain the tower for cold spells, because:
A) Antifreeze descales the pipes. B) A sudden cold spell can freeze the system. C) Antifreeze aids in draining the tower. D) Most municipalities require it.
What are the mechanisms of energy transfer to a closed system? How is heat transfer distinguished from the other forms of energy transfer?
What will be an ideal response?