Tech Time
What evacuation procedure removes moisture by pulling a vacuum, breaking it with nitrogen, and repeating the process three times?
Triple evacuation
What refrigerant issue commonly causes low suction pressure and high superheat?
Undercharge
What does EPA stand for?
Environmental Protection Agency
What federal law phased down the production and import of HFC refrigerants in the United States?
AIM Act
What animal has the same number of neck bones as a human despite having a much longer neck?
Giraffe
What tool measures vacuum levels in microns during evacuation?
Micron gauge
What refrigerant issue commonly causes high head pressure and poor condenser airflow?
Dirty condenser coil
What does ODP stand for in refrigerant regulations?
Ozone Depletion Potential
What ASHRAE standard covers the safe design, construction, and operation of refrigeration systems?
ASHRAE 15
What planet rains diamonds according to scientists?
Neptune
What procedure confirms a system has no refrigerant leaks before charging?
Pressure test
What metering device issue commonly causes a starving evaporator and high superheat?
Restricted TXV
What refrigerant oil is commonly used with R-410A systems?
POE oil
What UL standard addresses safety requirements for HVAC and refrigeration equipment using refrigerants?
UL 60335-2-40
What animal can regrow an entire limb after losing it?
Axolotl
What gas should be used to safely pressure test and break a vacuum in refrigeration systems?
Nitrogen
What refrigerant issue commonly causes high suction pressure and low superheat?
Overcharge
What does HCFC stand for?
Hydrochlorofluorocarbon
What EPA program evaluates and approves refrigerants based on environmental and safety impacts?
SNAP (Significant New Alternatives Policy)
What fast-food restaurant once sold spaghetti?
McDonald’s
What service procedure removes air and moisture from a refrigeration system before refrigerant charging?
Evacuation
What airflow problem commonly causes an evaporator coil to freeze solid?
Low airflow
What certification allows a technician to work on Type 1, 2, and 3 appliances?
Universal certification
What ASHRAE standard classifies refrigerants by toxicity and flammability such as A1 and A2L?
ASHRAE 34
What planet in our solar system spins sideways compared to the others?
Uranus