Low Blow
What federal law began the phasedown of HFC refrigerants like R-410A in the United States?
AIM Act
What EPA regulation made venting refrigerant illegal during service and repair?
Section 608
“A condenser coil rejects heat from the home into the outdoor air.”
True
A 410A system has a suction pressure of 118 PSI and a head pressure of 405 PSI on a 95°F day. What common issue could cause the high head pressure?
Dirty condenser coil
What popular video game was originally called “Cave Game” during development?
Minecraft
What refrigerant classification describes refrigerants with low toxicity and mild flammability such as R-454B?
A2L
What certification must technicians have to legally purchase regulated refrigerants?
EPA certification
“A TXV controls refrigerant flow by maintaining condenser subcooling.”
TXV controls superheat
A 410A TXV system shows 105 PSI suction and 250 PSI head pressure with high superheat. What refrigerant condition is likely present?
Undercharge
What everyday object was accidentally invented while trying to create super-strong glue?
Post-it Notes
What ASHRAE standard classifies refrigerants by toxicity and flammability ratings?
ASHRAE 34
What document should technicians keep when recovering or transferring refrigerant from systems?
Service records
“Low airflow across the evaporator usually increases suction pressure.”
Low airflow lowers suction pressure
A 410A system shows 145 PSI suction and 460 PSI head pressure with low superheat. What refrigerant condition is likely present?
Overcharge
What country consumes the most pizza per person in the world?
Norway
What EPA program evaluates and approves replacement refrigerants for environmental and safety concerns?
SNAP Program
What EPA-required process removes refrigerant from a system before opening it for repair?
Refrigerant recovery
“Refrigerant leaves the evaporator as a high-pressure liquid.”
Low-pressure vapor
A 410A system has normal head pressure but extremely low suction pressure and a freezing evaporator coil. What airflow issue may be present?
Dirty air filter
What famous arcade character was originally named “Puck Man”?
Pac-Man
What refrigerant is commonly replacing R-410A in many new residential systems because of its lower GWP?
R-454B
What international agreement phased out ozone-depleting refrigerants such as R-12 and R-22?
Montreal Protocol
“Adding refrigerant always lowers system head pressure.”
Adding refrigerant raises head pressure
A 410A system shows high head pressure, high suction pressure, and poor cooling with low subcooling. What problem is likely occurring?
Weak compressor valves
What soft drink was originally marketed as a brain tonic and medicine in the 1880s?
Coca-Cola