Canadian Entry To Practice (CETP) Practice Test 2026 - Free CETP Practice Questions and Study Guide

To determine how many pounds of propane a DOT rated cylinder with a water capacity (WC) of 120 pounds can safely store, we need to know the standard conversion factor used in the propane industry. The acceptable filling density for propane is typically 80% of the cylinder's water capacity.

By multiplying the water capacity of the cylinder by the filling density (which is 0.80), we calculate the maximum safe amount of propane that can be stored in the cylinder:

120 pounds WC × 0.80 = 96 pounds of propane.

Therefore, a DOT rated propane cylinder with a WC rating of 120 pounds can safely store up to 96 pounds of propane. This is based on regulations and safety considerations to ensure that the pressure in the cylinder does not exceed safe limits, especially under varying temperature conditions.

It's important to note that the other options do not reflect the accurate calculation based on industry standards. For example, the choice indicating 50 pounds is significantly below the maximum storage capacity and does not utilize the full potential of the cylinder. The choice of 100 pounds would exceed the safety threshold, and while 80 pounds may seem within a reasonable range, it does not represent the maximum capacity accurately calculated.