For large volumes of viscous liquids, preferred measurement method is:

• A. Time
• B. Weight
• C. Temperature
• D. Volume

Answer: (B)

Measuring by mass is preferred for large volumes of viscous liquids because it avoids the errors that plague volumetric methods with thick liquids. Very viscous liquids cling to container walls, pour slowly, and can trap air or leave uneven residues, making accurate volume measurements difficult. Temperature changes affect volume much more than mass, so weight remains a more stable, reproducible quantity. If needed, you can convert the measured mass to volume using the liquid’s density at the working temperature, but the direct measurement by weight provides the most reliable result for large, viscous quantities.