Basic Firefighter Written Practice Exam

In drafting operations, which component is crucial for creating a proper suction?

1. Wet strainer

2. Float device

3. Air valve

4. Hard suction

The correct answer is: Hard suction

In drafting operations, a hard suction hose is essential for creating proper suction. Hard suction hoses are designed to withstand the negative pressure created when water is drawn from a static source, such as a river or pond. These hoses are typically rigid, which prevents them from collapsing under suction and ensures a consistent flow of water into the pump. The use of hard suction is also critical because it provides an effective seal with the strainer at the water source, minimizing air infiltration. This seal is necessary for maintaining the required pressure and flow of water, allowing firefighters to effectively draft water during operations. While other components like a wet strainer might be involved in filtering debris or a float device might help maintain the position of the strainer in the water, they do not directly facilitate the suction process itself. An air valve is also important for managing air within the system, but the hard suction hose is the key element specifically required for creating that vital suction needed for drafting operations.