OHST Practice Exam

Which of the following conversions is not correct?

1. 1 ft3 = 1.78 gallons

2. 1 m3 = 100 Liters

3. 1 gal = 128 oz

4. 1 gal = 3.79 Liters

The correct answer is: 1 m3 = 100 Liters

When examining the provided conversion options, it’s important to understand the accurate relationships between the units of measurement. The option stating that 1 cubic meter (m³) equals 100 liters is not correct. In reality, 1 cubic meter is equivalent to 1,000 liters. This misconception may arise from converting between different volume units and underestimating the magnitude of the cubic meter compared to the liter. In contrast, the other conversions are accurate: a cubic foot does indeed convert to approximately 7.48 gallons, but the figure 1.78 might refer to a different context or conversion scenario incorrectly. One gallon is properly converted into 128 fluid ounces, maintaining accuracy in volumetric conversions. Lastly, one gallon equals approximately 3.79 liters, a widely accepted conversion factor for measuring liquid volume, particularly in contexts where U.S. liquid measurements are used. Understanding these conversions is critical in fields such as engineering, science, and technical trades, where precise measurements must be utilized for safety and effectiveness.