What does a tank classified as 'portable' typically include?

A tank classified as 'portable' is specifically designed for easy handling and transportation. This means that it is built to be lightweight or has mobility features, allowing it to be moved from one location to another with efficiency. Portable tanks are often used in situations where flexibility and quick deployment are necessary, such as in firefighting or construction settings.

This option highlights the fundamental characteristic of portable tanks – their inherent mobility, which distinguishes them from fixed tanks that are meant to remain in one location. Understanding this aspect is essential for recognizing the practical applications and limitations of different types of tanks in various industries.