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HVAC Excellence REFR
HVAC Excellence REFRIG study guide
| Question | Answer |
|---|---|
| 1. In a dry type (direct expansion) evaporator, liquid refrigerant must boil away as close to the end of the coil as possible in order to: | operate at high efficiency |
| 2. The difference between the temperature of the refrigerant boiling in the evaporator and the temperature at the evaporator known outlet is as: | Evaporator superheat |
| 3. An expansion device that is stuck open will cause: | a flooded evaporator |
| 4. When measuring evaporator superheat on a commercial system that has a long suction line, the pressure reading should be taken at the: | compressor inlet |
| 5. Superheat measurements are best taken | D. with the system operating at design conditions. |
| 6. A technician is checking the superheat on a multi circuit evaporator and finds one of the circuits has a superheat that is higher than the others. This could be caused by: | a blocked distributor |
| 7. A TXV with an external equalizer is used on: | with a high evaporators drop pressure |
| 8. Dry type evaporators operate most efficiently with a superheat setting of approximately | 8° F to 12°F |
Created by:
LuisMoux