Using the graph shown in the illustration, the oil being separated has a specific gravity of .87 kg/dm3 at 72.5°C. What will be the specific gravity if the temperature is lowered to 40°C? Illustration MO-0113

Correct Answer: Option C — 0.892 kg/dm3

Cooling a liquid causes contraction and increases density. Utilizing the thermal expansion nomograph (MO-0113), dropping the temperature from 72.5°C down to 40°C increases the fluid specific gravity to 0.892 kg/dm3 due to volume reduction.