Refrigerant Charge Measurements & Tool Use

2. Based on its glide, R-454B is an example of a _________________ refrigerant blend.

3. In systems charged with blended refrigerants, the _______ point determines saturation temperature in the evaporator coil prior to superheating, and the ______ point determines saturation temperature in the condenser prior to subcooling.

4. True or False: Analog gauge and compound gauge mean the exact same thing.

5. What is the purpose of a 4-port manifold set?

6. True or False: You must set the charge before setting the airflow.

7. Where do you place your static pressure probes when measuring total external static pressure on a gas furnace with an A-coil downstream of the heat exchanger?

8. Superheat is measured at the ______________, and total superheat is measured at the ______________.

9. True or False: Craig recommends letting the system run and stabilize for LONGER before collecting charge readings on R-454B systems than R-410A or R-22.

10. What does it mean to compare benchmark data?