Canadian Entry To Practice (CETP) Practice Test

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When filling a container by volume, what is the maximum permitted fill level as a percentage of the gallon WC rating?

80%
42%
100%
60%

The correct answer is: 42%

When filling a container by volume, the maximum permitted fill level is generally set to ensure the safe operation of the container and the liquid within. In this context, the correct percentage is 42%. This specific guideline is based on industry standards designed to prevent overfilling, which can lead to leaks or spills, especially with hazardous materials. The recommendation to fill only up to 42% of the container's gallon WC (water capacity) rating provides a safety margin that accommodates expansion and minimizes the risk of overflow. The other percentages mentioned do not adhere to these safety standards. For instance, filling to 80% or 100% would not allow for expansion of the liquid and could result in unsafe conditions, particularly with temperature variations that might cause fluid to expand. Filling a container to 60% also exceeds the safe threshold established for certain applications and can pose similar risks as the higher percentages.