When full, a gas cylinder registers a pressure of 2200 psig. After a few hours of use, the pressure gauge reads 550 psig. The cylinder is now how full?
a. One-half
b. One-third
c. One-fourth
d. Two-thirds
ANS: C
For gas-filled cylinders, the volume of gas in the cylinder is directly proportional to its pressure at a constant temperature. If a cylinder is full at 2200 psig, it will be half full when the pressure de-creases to 1100 psig.
You might also like to view...
All of the following are limitations to scaling and root planing except one. Which one is the exception?
A) Anatomy of the tooth B) Furcation defects C) Deep pockets D) Minimal amount of mucosa
A maintenance contract
A. covers services not covered in the basic maintenance agreement. B. facilitates all repairs needed regardless of the cause. C. specifies when the equipment will be cleaned, checked, and repaired. D. covers all repairs for an extended period of time.