In a dual-fuel heat pump packaged system, when does the furnace go into use?
A) Once the outdoor temperature drops to the balance point
B) Once the outdoor temperature is below the balance point
C) Only when it is most economical
D) Only during winter conditions
A
You might also like to view...
Technician A says that dual actuator EUIs are better suited to multi-pulse injection because the injection pressure is not required to collapse between pulses. Technician B says that at the instant a control valve actuator is energized in an E3 injector, pressure rise is created in the EUI pump chamber. Who is correct?
A. Technician A only B. Technician B only C. Both A and B D. Neither A nor B
Materials that absorb fluids are permeable.
Answer the following statement true (T) or false (F)
All of the gases are measured in percentages EXCEPT ________
A) HC B) CO C) CO2 D) O2
What efficiency advantage do water source heat pump systems have over air source heat pump systems?
A) It takes less horsepower to pump water than air B) They transfer heat to water that is warmer in the winter and cooler in the summer than the surrounding air temperature C) Heat has more affinity for water than air D) Water is a more efficient refrigerant than either R-22 or R-410A