Recreational Vehicle (RV) Technician Practice Test

What causes exceeding the vaporization rate of a propane container?

1. High ambient temperature

2. Cold ambient temperature

3. Low liquid level only

4. Improper valve maintenance

The correct answer is: Cold ambient temperature

The vaporization rate of a propane container is primarily affected by temperature. When the ambient temperature is cold, the pressure inside the propane container decreases, which can lead to an inadequate vaporization rate. Propane needs a certain ambient temperature to vaporize effectively into a gas for use. If the temperature is too low, the liquid propane will not vaporize sufficiently to meet the demand for gas, which can result in operational issues. In contrast, high ambient temperatures can increase vaporization rates, and low liquid levels can lead to different problems, but they don't specifically cause an exceeding of the vaporization rate. Proper valve maintenance is essential for ensuring the safe and effective functioning of propane systems but does not directly relate to the vaporization rate itself. Thus, cold ambient conditions directly contribute to inadequate vaporization by reducing pressure, highlighting why it is the correct answer to the question.