Engine Safety (Supplementary) USCG Question #461 (Set 6)

If a particular liquid has a specific gravity of .96kg/dm3 at 77°F, what will be the specific gravity of the liquid, as determined from the graph shown in the illustration, if the temperature is increased to 167°F? Illustration MO-0113

USCG Exam Illustration MO-0113
USCG Examination Diagram: Illustration MO-0113
Official USCG Answer & Rule Citation

Correct Answer: Option C — .925 kg/dm3

Liquids expand as temperature increases, causing a decrease in density and specific gravity. Using the provided MO-0113 graph, locate the initial specific gravity of 0.96 at 77°F. Following the thermal expansion curve to 167°F, the corresponding specific gravity value on the vertical axis is 0.925 kg/dm3, reflecting the expected volumetric expansion.

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