Refrigerant Cylinder & Storage Safety Flashcards
7 cards from real CFC practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Refrigerant Cylinder & Storage Safety flashcards as text
Which refrigerant cylinder marking indicates the year the cylinder must next undergo hydrostatic retesting?
Answer: The retest date stamped on the shoulder or collar of the cylinder
DOT requires the retest date to be stamped on the cylinder so inspectors and users can confirm the cylinder is within its certification period.
A technician wants to store full recovery cylinders in a service van overnight. Which condition is a safety violation?
Answer: Cylinders are stored in the enclosed passenger compartment of the van
Storing refrigerant cylinders inside an enclosed passenger area is dangerous because a leak could displace oxygen or expose occupants to toxic refrigerant vapors.
What does the DOT specification 'DOT-4BA' on a cylinder mean?
Answer: It designates a specific cylinder design standard specifying material, wall thickness, and test pressure
DOT specification codes like 4BA define the construction standard (material, design pressure, testing requirements) that the cylinder meets.
Which practice is required when connecting a refrigerant cylinder to a manifold gauge set to prevent contamination of the refrigerant supply?
Answer: Purge the hose with refrigerant before opening the cylinder valve
Purging the manifold hose with a small amount of refrigerant before opening the cylinder fully removes air and moisture that could contaminate the refrigerant.
Under DOT regulations, non-refillable (disposable) refrigerant cylinders may NOT be:
Answer: Refilled and resold
DOT prohibits refilling non-refillable cylinders because they are not designed or tested for repeated pressurization cycles, creating a rupture hazard.
When should a technician perform a leak check on a refrigerant recovery cylinder before using it?
Answer: Before each use, especially at valve connections and relief devices
Inspecting recovery cylinders for leaks before each use prevents refrigerant loss and ensures safe operation during recovery procedures.
What is the correct procedure when a refrigerant cylinder's fusible plug has melted and released refrigerant?
Answer: Evacuate the area, ventilate if possible, and remove the cylinder from service
A blown fusible plug signals that the cylinder was overheated; the cylinder must be removed from service and the area evacuated due to refrigerant release hazard.