Basic Firefighter Written Practice Exam

What are the appropriate hose sizes for attacking a structure fire?

1. 1 inch and 2 inches

2. 1 ½ inch and 2 ½ inch

3. 1 ¾ inch and 3 inch

4. 2 inch and 4 inch

The correct answer is: 1 ½ inch and 2 ½ inch

Choosing the right hose size is critical for effectively attacking a structure fire. The most appropriate sizes for this purpose are typically 1 ½ inch and 2 ½ inch hoses. These sizes balance the need for sufficient water flow and pressure, while also being manageable for firefighters to handle during operations. The 1 ½ inch hose is commonly used for many interior attacks, as it allows for adequate water flow to suppress fires while being lightweight enough for quick maneuverability in tight spaces. On the other hand, the 2 ½ inch hose provides a higher volume of water, which is advantageous for larger fires or when a rapid knockdown is necessary. It can also be used as a supply line in some situations, making it versatile for different firefighting strategies. In contrast, other hose sizes listed, such as 1 inch or 2 inch, do not typically provide the necessary flow rates for effective firefighting in structural fires. The use of hoses that are too small may lead to inadequate fire suppression capabilities, while sizes like 3 inch and 4 inch are generally reserved for supply lines rather than direct attack scenarios due to their size and weight. Therefore, 1 ½ inch and 2 ½ inch are the most practical and effective choices