Basic Firefighter Written Practice Exam

To obtain a vacuum or suction when drafting, what must all collections be?

1. Open

2. Air tight

3. Under pressure

4. Flexible

The correct answer is: Air tight

To obtain a proper vacuum or suction when drafting, it is crucial for all connections in the system to be air tight. This is because any leaks in the system can allow air to enter, which would compromise the ability to create the vacuum necessary for drawing water from a source. When drafting, the pump creates a low-pressure environment, and to effectively pull water, it must have a sealed pathway that ensures that only the water enters the system without any air intrusion. This principle is fundamental in firefighting operations that rely on suction for water supply, as even small gaps can lead to significant operational failures. By maintaining an air-tight condition, firefighters can ensure efficient suction, enhancing the flow of water needed for firefighting efforts. Other options may describe physical properties, but they do not directly address the requirement for creating a vacuum.