How does a liquid-line filter drier designed for heat pump use differ from a standard liquid-line filter drier?
A) Heat pump filter driers are manufactured from stainless steel.
B) Heat pump filter driers are bidirectional.
C) Heat pump filter driers have two inlets and two outlets to accommodate reverse refrigerant flow.
D) Heat pump filter driers can withstand higher pressures.
[Ques. 2] The performance of an air-conditioning system can be determined by measuring the airflow and:
A) The dry-bulb temperature difference across the evaporator coil.
B) The dry-bulb temperature difference across the condenser.
C) The wet-bulb temperature difference across the condenser.
D) The wet-bulb temperature difference across the evaporator coil.
[Ques. 3] What is the net stack temperature?
A) Stack temperature - ambient temperature = net stack temperature
B) Supply air temperature - ambient temperature = net stack temperature
C) Stack temperature + ambient temperature = net stack temperature
D) Supply air temperature + ambient temperature = net stack temperature
[Ques. 4] The LEED program standards are developed by:
A) NHAB - National Association of Home Builders.
B) EPA - Environmental Protection Agency.
C) USGBC - United States Green Building Council.
D) DOE - Department of Energy.
[Ques. 5] With the compressor off, a technician compares the pressure of an air-cooled condenser with the pressure given on the PT chart for that refrigerant and temperature. The system pressure is considerably higher than the pressure indicated on the PT chart for that refrigerant and temperature. This indicates that:
A) The system has noncondensable gases in it.
B) The system has been properly evacuated and charged.
C) The system has been slightly overcharged.
D) The system has been undercharged.
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