Which of the following mechanisms do all compressed gas cylinders use to avoid excessively high buildup of cylinder pressure?
a. Internal convection cooling mechanism
b. Pressure-relief mechanism on the valve stem
c. Automatic cylinder breech mechanism
d. Pressure-relief mechanism on the cylinder body pressure relief valves.
ANS: B
Should the temperature increase too much (as in a fire), the high gas pressure could rupture and explode the cylinder. To prevent this type of accident, all cylinders have high-pressure relief valves.
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