CFC Refrigerant Cylinder & Storage Safety 2

Question 1

What is the maximum allowable filling density (percent of water capacity by weight) for a DOT-39 non-refillable refrigerant cylinder?

Accepted Answer

The percentage listed on the cylinder label

Answer

DOT-39 cylinders must not be filled beyond the filling density specified on the cylinder's label, which varies by refrigerant type.

Question 2

Which color is used to identify cylinders containing R-410A refrigerant under the ARI color-coding standard?

Accepted Answer

Rose/pink

Answer

R-410A cylinders are color-coded rose/pink under the ARI (now AHRI) standard to help technicians identify the refrigerant.

Question 3

A technician finds a refrigerant cylinder with no label. What is the correct action?

Accepted Answer

Treat the cylinder as unknown and take it out of service

Answer

An unlabeled cylinder must be removed from service because the contents cannot be positively identified, posing safety and regulatory risks.

Question 4

What type of valve is required on all DOT cylinders used to transport refrigerant to prevent accidental release during transport?

Accepted Answer

Protective cap or collar over the valve

Answer

DOT regulations require that cylinder valves be protected by a cap or collar to prevent accidental opening or damage during transportation.

Question 5

When storing refrigerant cylinders outdoors, which precaution is MOST important to prevent pressure buildup?

Accepted Answer

Shade cylinders from direct sunlight and heat sources

Answer

Shading cylinders prevents solar heat gain, which can raise internal pressure and risk cylinder failure or pressure-relief discharge.

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