Technician A says that a bake oven removes rust. Technician B says that a bake oven removes scale. Who is right?
A. ?Technician A only
B. ?Technician B only
C. ?Both A and B
D. ?Neither A nor B
Answer: C
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Awning windows can be 100% openable and are best used where extreme weather conditions require a tight seal when the window is closed, although these windows are in common use everywhere.
Answer the following statement true (T) or false (F)
The direction of a property line is usually expressed as a ____ angle.
A. P.O.B. B. right C. bearing D. grading
How can many water-source heat pump systems be configured to supply hot domestic water?
A) by lengthening the evaporator coil and attaching it to an electric hot-water heater B) by using de-superheating coils and water-circulating pumps built into many systems C) by adjusting the power of the condenser and heat pump D) by adjusting the load EWT and LWT levels to a higher temperature, which ensures enough water for heating and domestic use
If, while troubleshooting an R-22 residential air conditioning system at near design conditions, the operating pressures are found to be 40 psig on the low side and 116 psig on the high side, it is most likely that the system is
A. overcharged B. operating with a dirty condenser C. undercharged D. operating properly