Prepare for your EPA Section 608 Technician Certification exam with these practice questions and answers. This guide covers refrigerant handling, recovery procedures, environmental regulations, and safety requirements.
Q: The sale of reclaimed CFC, HCFC, HFC, and HFO refrigerants is_______.
Answer: Restricted to technicians who are EPA certified and refrigerant recovery
Q: A small Pliance is defined as a system that is
Answer: Manufactured, fully charged, and hermetically sealed in a factory with a charge of 5 pounds or less
Q: A __________ recovery device can be use for type 1 small appliance applications or type 2 applications if the total charge is below 15 pounds.
Answer: System dependent
Q: You must have a self-contained recovery machine available unless you only work on
Answer: Small appliances
Q: Recovery devices for use with small appliances must be capable of
Answer: Recovering 90% of the refrigerant when the compressor is operating
Q: The hydrocarbon refrigerant approved for retrofit into existing household refrigerators is
Answer: None. Hydrocarbons are not approved for any retrofit applications
Q: New household refrigerators with a charge of less than 57 grams (2 ounces weight) can use any of the following refrigerants, except.
Answer: R-1235yf
Q: And exempt refrigerant is any refrigerant that has a 0 Ozone depletion potential (0 ODP) any global warming potential (GWP) equal to or lower than carbon dioxide, that is a GWP of _________ or less.
Answer: 1
Q: What is not a small appliance?
Answer: An MVAC-like system that holds 3 pounds of R-22
Q: Any system with a charger less than ________ pounds can you system dependent recovery equipment.
Answer: 15
Q: Anytime pressurized nitrogen is put into the system, the nitrogen gas
Answer: Maybe vented to the ambient air
Q: When a tank of mixed refrigerant is sent to a reclaimer, they can
Answer: Either refuse to except the refrigerant or charge extra for processing it
Q: A passive system dependent recovery process
Answer: Recovered refrigerant in a non-pressurized container
Q: What is the pressure of a storage cylinder of R-134A, that is stored in a room where the temperature is 100°F?
Answer: 124 PSIG
Q: What is the pressure of a storage cylinder of R-404A, that is stored in a room where the temperature is 100°F?
Answer: 237 psig
Q: Any refrigerant that is vented off the top of the charging cylinder
Answer: Must be recovered
Q: Recovery of refrigerant cannot begin if the initial pressure in the system is
Answer: 0 psig
Q: What is the pressure of the storage cylinder of R-410a, that is stored in a room where the temperature is 100°F?
Answer: 319 psig
Q: To reach the necessary recovery level, when using a ________, it will most likely be essential to heat and strike the compressor with a rubber mallet to release any refrigerant.
Answer: Passive recovery devices on a small appliance with a non-operating compressor
Q: You must know the ________ before beginning a refrigerant recovery.
Answer: Type of refrigerant that is in the system
Q: Nitrogen tanks should always be equipped with a ________.
Answer: Pressure regulator and pressure relief valve downstream of the regulator
Q: If a large leak of refrigerant occurs, __________.
Answer: Immediately vacate in naturally ventilate the area
Q: A very large refrigerant leak can cause Suffocation because refrigerants
Answer: Are heavier than air and displace oxygen
Q: Always _____________ when connecting or disconnecting refrigeration hoses.
Answer: 1.) wear safety eyewear and butyl-lined gloves 2.) verify the hoses are rated for the refrigerant being used 3.) avoid trapping liquid refrigerant in the hoses
Q: CFC and HCFC refrigerants can decompose to form
Answer: Hydrochloric and hydrofluoric acids
Q: Applying heat, with a heat gun, to the compressor;
Answer: Can help vaporize any trapped liquid refrigerant during recovery.
Q: Which HC refrigerant is allowed for use in new domestic small appliances?
Answer: R-600a
Q: Technicians who perform sealed system service on small points is must have
Answer: Type 1 or universal certification
Q: Recovering multiple types of refrigerant in the same cylinder;
Answer: Will make the reclaimed refrigerants unreclaimable
Q: Type one certification is required for;
Answer: Persons handling refrigerant during maintenance, service, or repair of small appliances.
Q: Recovery equipment must be
Answer: Certified by an EPA approved testing laboratory
Q: When filling a charging cylinder with a regulated refrigerant;
Answer: The refrigerant vapor that is vented off the top of the cylinder must be recovered.
Q: Which of the following is true regarding refrigerant leaks one small appliances?
Answer: EPA does not require repair, but leaks should be repaired whenever possible.
Q: If a strong odor is detected while performing a refrigerant recovery process,
Answer: A compressor burnout has likely occurred.
Q: Small appliances are equipped with a straight piece of tubing (process stub) that is used;
Answer: As the installation location for piercing type access valve
Q: System dependent or passive recovery equipment ;
Answer: Captures refrigerant into a non-pressurized container.
Q: When pressurizing the system with nitrogen you should;
Answer: Charge through a pressure regulator and install a relief valve in the line downstream from the pressure regulator.
Q: On a system with an operating compressor, recovery equipment must be capable of recovering;
Answer: 90% refrigerant or achieving 4 inches of vacuum
Q: With a non-operating system compressor, recovery equipment must be capable of recovering;
Answer: 80% of the refrigerant or achieving 4 inches of vacuum
Q: Which of the following is an example of a noncondensible?
Answer: Air
Q: When the system is in deep vacuum;
Answer: Never energize the compressor
Q: If, after installing a fitting for the purpose of recovering the appliances refrigerant, you find that the system pressure is 0 psig;
Answer: Refrigerant recovery is not required
Q: After the refrigerant has been recovered, which of the following can be used to flush the system?
Answer: Nitrogen
Q: When using a system dependent recovery system on an appliance that has a non-operating compressor, the technician should;
Answer: Please access fitting on both the low and high side of the system
Q: System dependent recovery methods may only be used on appliances containing;
Answer: 15 pounds of refrigerant or less
Q: Self contained or active recovery equipment;
Answer: Has its own means to recover refrigerant
Q: If regulations change after the technician become certified;
Answer: The technician is responsible for complying with any changes to the regulations
Q: When using a system dependent recovery system on an appliance that has an operating compressor, the technician should;
Answer: Run the compressor and recover from the high side of the system only.
Q: Small appliances in recreational vehicles may use refrigerants such as ammonia, hydrogen, and water. These refrigerants;
Answer: Should not be recovered
Q: A small appliance is defined by EPA as;
Answer: Appliances manufactured, charged, and hermetically sealed in a factory with 5 Lbs or less of refrigerant