Refrigerant cylinders may be transported in the ________________ position.

When working with any refrigerant, flammable or non-flammable, always refer the _______________________ for specific hazards and hazard mitigation actions.

DOT regulations require refrigerant cylinders containing over 2.2 lbs. of a 2L refrigerant to be equipped with a ___________________________ instead of a rupture disc.

OSHA requires that if flammable refrigerant cylinders are to be stored in an enclosure, the enclosure be ____________________ and _____________________.

Specific applications and use limitations for the installation of A2L equipment can be found in the _______________________________.

When working with a flammable refrigerant, recommended PPE can be found in the ________________________.

With proper ventilation on a jobsite or work area, flammable refrigerants can be kept below their __________________________ should a leak occur.

Accumulation of a flammable refrigerant in a confined space can lead to a ________________________ or __________________________.

Underwriters Laboratories’ (UL) standards require that systems charged with a flammable refrigerant have a label affixed to the unit that is filled out by _______________________________.

EPA Section 608 regulations require that if a system is charged with a flammable refrigerant, the equipment must have __________________________ on the service and access valves which must extend at least 1 inch in each direction.

_________________________ is a measurement of the amount of heat released when a substance, in this case, a refrigerant, burns.

The ________________________ is the minimum electrical spark energy, in millijoules (mJ), required to ignite a flammable gas/air mixture.

The __________________ of a combustible gas (flammable refrigerant) is the rate at which a flame front spreads relative to the unburned gas ahead of the flame.

The __________________________ is the lowest of three calculated limits for: toxicity, oxygen deprivation (asphyxiation), and/or flammability.

The __________________________ is the minimum concentration of a flammable substance, in this case a refrigerant, that is capable of ignition when there is a sufficient mixture of air and the substance.

Which of the following can form when any fluorine-containing refrigerant undergoes complete or incomplete combustion, or thermal decomposition?

When fluorinated refrigerants decompose, they can also form a short-lived gas called ____________________.

Currently, the charge limit for systems containing an A3 refrigerant is ____________________.

When installing or service a system that is charged with a flammable refrigerant, always keep a Class __________________ fire extinguisher on the jobsite.

The maximum charge size for the A2L equipment being installed will be limited by the __________________________ served by the equipment.

______________________ are designed and installed to prevent accumulation and/or ignition of flammable refrigerant vapors should a leak occur.

______________________ can activate mechanical ventilation systems, activate a solenoid to force the system into a pump down, de-energize the system completely, or a combination of mitigation responses using control logic electronics.

Refrigerant piping that is installed inside of a wall or floorspace, where it passes through joists or studs, must be protected by ______________________.

After installation, the refrigerant piping must ________________________________.

R-410A has an RCL of __________ PPM.

R-454B has an RCL of __________ PPM.

R-1234yf has and RCL of __________ PPM.

R-32 has an LFL of _________%.

R-600a has an LFL of _________%.

R-1234yf has an MIE of __________ mJ.

R-32 has an MIE of __________ mJ.

R-1234yf has an HOC of __________ Btu/lb.

R-290 has an HOC of __________ Btu/lb.