Storage and Transportation Flashcards
6 cards from real A2L practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 Storage and Transportation flashcards as text
When transporting A2L refrigerant cylinders in a service vehicle, what is the generally mandated orientation for the cylinders?
Answer: Vertically and securely fastened, so the pressure relief device is in the vapor space.
According to DOT regulations and safety best practices, A2L refrigerant cylinders must be transported in an upright, vertical position. This ensures that the pressure relief device, located at the top of the cylinder, is in contact with the vapor phase of the refrigerant, not the liquid phase. If the cylinder were on its side and the relief device activated, it could discharge liquid refrigerant, which is a much greater hazard than vapor.
A technician is setting up a temporary storage area for A2L refrigerant cylinders at a job site. Which of the following is a critical requirement for this storage area?
Answer: The area must be well-ventilated and away from ignition sources.
Due to their mild flammability, A2L refrigerants must be stored in areas with adequate ventilation to prevent any potential accumulation of flammable gas. It is equally important to keep them away from any potential ignition sources, such as open flames, sparks, or high-temperature equipment.
According to transportation guidelines, what is a key requirement for a service vehicle used to transport A2L refrigerant cylinders?
Answer: The vehicle must be equipped with a Class B dry powder fire extinguisher.
Best practices and regulations for transporting flammable materials like A2L refrigerants require having an appropriate fire extinguisher on board. A Class B fire extinguisher is designed for flammable liquids and gases, making it the correct choice for this application.
A technician needs to dispose of an empty, non-refillable (DOT-39) A2L refrigerant cylinder. After recovering any remaining refrigerant, what is the next critical step before recycling the cylinder?
Answer: Puncture the cylinder or render it unusable after ensuring it is at atmospheric pressure.
To prevent reuse and ensure safety, empty non-refillable cylinders must be made unusable before being sent for recycling. This typically involves recovering all refrigerant to at least atmospheric pressure, then puncturing the cylinder, removing the valve, or otherwise rendering it incapable of holding pressure.
What is the maximum amount of A2L refrigerant, by weight, that a technician is generally permitted to carry in a service vehicle without needing to meet more stringent placarding requirements?
Answer: 225 lbs
While specific local regulations may vary, a common threshold for transporting A2L refrigerants in a service vehicle before extensive DOT placarding is required is 225 lbs. Exceeding this amount often triggers additional hazardous material transportation regulations.
When storing multiple A2L refrigerant cylinders in a warehouse, which of the following is a key requirement according to fire safety codes?
Answer: Visible hazard identification signs (e.g., NFPA 704) must be posted.
Fire safety codes, such as those from the NFPA, require that areas used for storing flammable materials have clear and visible hazard identification signage. This includes signs like the NFPA 704 diamond, which alerts emergency responders to the specific hazards (flammability, health, reactivity) present in the storage area.