Canadian Entry To Practice (CETP) Practice Test 2025 - Free CETP Practice Questions and Study Guide

The correct understanding of when odorant is added to propane is during the initial processing phase after it has been extracted but before it is distributed for use. This step is crucial because propane in its natural state is odorless and adding odorant during the processing phase ensures that it is detectable by smell for safety reasons. This practice helps to prevent accidents by allowing leaks to be easily identified.

Adding the odorant before it is delivered to the bulk plant ensures that the propane is safe for handling and consumer use right from the start of its transport phase. Odorization needs to occur early to maintain safety throughout the entire handling process.

The other timing options mentioned, such as adding the odorant during the transfer to the delivery truck or after it is placed in a storage tank, would delay the point at which safety measures are implemented, potentially leading to dangerous situations if a leak were to occur. Thus, the timing of odorant addition is a critical component of propane safety protocols.