Steam Plants (Boilers & Turbines) USCG Question #460 (Set 16)

Which of the following statements is true concerning the information tabulated in the table? Illustration SG-0004

USCG Exam Illustration SG-0004
USCG Examination Diagram: Illustration SG-0004
Official USCG Answer & Rule Citation

Correct Answer: Option B — When one pound of water changes to one pound of steam at 200 psia (1378.8 kPa), its volume increases 124.41 times.

Standard thermodynamic steam tables verify that when one pound of water completely vaporizes at 200 psia, its specific volume transitions from liquid to vapor, expanding by a factor corresponding exactly to the tabulated specific volume ratio of 124.41.

100% Free & Open Access — No daily limits, paywalls, or gated answers on BrightMariner.