How does nozzle pressure affect the required pump discharge pressure?

Nozzle pressure is a critical factor that influences the required pump discharge pressure in a firefighting scenario. When nozzle pressure increases, the pump must work harder to provide adequate water flow and maintain that increased pressure at the nozzle. This is because the pressure required at the nozzle directly affects the flow rate and the effectiveness of water being delivered to the fire or target area.

In firefighting operations, if a firefighter requires a certain nozzle pressure to achieve the desired flow rate and reach the intended target (like a fire), the pump discharge pressure must be adjusted accordingly to meet or exceed this requirement. Therefore, an increase in the nozzle pressure necessitates an increase in the pump discharge pressure to ensure that adequate water is delivered effectively.

Understanding the relationship between nozzle pressure and pump discharge pressure is vital for effective firefighting, as it helps ensure that the right amount of water at the right pressure is available when needed. This is why the correct answer is that it increases the pump pressure.