CFC Refrigerant Cylinder & Storage Safety 4

Question 1

Which refrigerant cylinder marking indicates the year the cylinder must next undergo hydrostatic retesting?

Accepted Answer

The retest date stamped on the shoulder or collar of the cylinder

Answer

DOT requires the retest date to be stamped on the cylinder so inspectors and users can confirm the cylinder is within its certification period.

Question 2

A technician wants to store full recovery cylinders in a service van overnight. Which condition is a safety violation?

Accepted Answer

Cylinders are stored in the enclosed passenger compartment of the van

Answer

Storing refrigerant cylinders inside an enclosed passenger area is dangerous because a leak could displace oxygen or expose occupants to toxic refrigerant vapors.

Question 3

What does the DOT specification 'DOT-4BA' on a cylinder mean?

Accepted Answer

It designates a specific cylinder design standard specifying material, wall thickness, and test pressure

Answer

DOT specification codes like 4BA define the construction standard (material, design pressure, testing requirements) that the cylinder meets.

Question 4

Which practice is required when connecting a refrigerant cylinder to a manifold gauge set to prevent contamination of the refrigerant supply?

Accepted Answer

Purge the hose with refrigerant before opening the cylinder valve

Answer

Purging the manifold hose with a small amount of refrigerant before opening the cylinder fully removes air and moisture that could contaminate the refrigerant.

Question 5

Under DOT regulations, non-refillable (disposable) refrigerant cylinders may NOT be:

Accepted Answer

Refilled and resold

Answer

DOT prohibits refilling non-refillable cylinders because they are not designed or tested for repeated pressurization cycles, creating a rupture hazard.

(CFC) Chlorofluorocarbon Certification Practice Test

(CFC) Chlorofluorocarbon Certification Practice Test

CFC Refrigerant Cylinder & Storage Safety 4