Why do heat pumps operate more efficiently than electric furnaces?
A) They use electricity to move heat rather than converting electricity directly to heat
B) Heat pumps and electric furnaces actually operate at about the same efficiency
C) Refrigerant has a natural affinity for heat
D) Heat pumps use a more direct method of converting electrical energy to heat energy
A
You might also like to view...
Explain a method used on walk-in coolers and freezers to help prevent warm air from entering the case when the door is opened
What will be an ideal response?
Which of the following is NOT a cause of bearing failure?
A. High operating temperature B. Foreign material in oil supply C. Too much grease D. Not lubricating a sealed bearing
Why is low water a dangerous condition for a boiler?
A) A boiler that is low on water will have higher-than-normal internal mineral deposits. B) A boiler that is low on water can cause excessive energy bills. C) A boiler that is low on water can create steam pressure and explode as a result. D) A boiler that is low on water can cause the burners to overheat.
On bevel gears, the pitch cone angle is the same as the _________________________.
Fill in the blank(s) with the appropriate word(s).