How can a technician make sure a recovery cylinder stays under the 80 percent fill limit?
Safety · EPA 608 Core. The correct answer, and the reasoning behind it.
Exposure risks, protective equipment, the 80% cylinder limit and nitrogen for leak testing.
The question
How can a technician make sure a recovery cylinder stays under the 80 percent fill limit?
- Stop as soon as the recovery machine sounds strained
- Watch the cylinder pressure gauge
- Feel the side of the cylinder for cold spots
- Weigh it and compare with its allowed fill weightCorrect answer
Why “Weigh it and compare with its allowed fill weight” is correct
Pressure in a cylinder depends on temperature, not on how full it is, so a gauge cannot show the fill level. Weighing the cylinder, or using a float switch on cylinders that have one, shows how much liquid is inside.
Source: EPA: Test Topics
Why the other answers are wrong
- Stop as soon as the recovery machine sounds strained — Machine sound does not measure fill level.
- Watch the cylinder pressure gauge — Cylinder pressure follows temperature, not the amount of liquid.
- Feel the side of the cylinder for cold spots — Cold spots are an unreliable guess at the liquid level.
Practice more of this
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