What should the nozzle pressure be reduced to while splitting operations for encapsulant application?

The correct answer indicates that during splitting operations for encapsulant application, the nozzle pressure should be maintained between 400 and 1500 psi. This range is crucial because it ensures that the encapsulant is applied effectively without risking excessive pressure that could lead to misting or overspray, which can compromise the quality of the application and jeopardize safety.

Keeping the pressure within this specified range allows for optimal atomization of the encapsulant, facilitating even coverage over the asbestos-containing material. Additionally, operating within these parameters helps to prevent potential hazards associated with higher pressures, such as splatter or the dislodgement of asbestos fibers into the air.

The other options either present pressures that are too low or too high, which can lead to ineffective application or increased risk during encapsulation processes. For instance, pressures below 400 psi may not adequately atomize the encapsulant, resulting in poor coverage, while pressures above 1500 psi could create harmful aerosolized particles. Therefore, maintaining a pressure between 400 and 1500 psi is essential for safe and effective encapsulant application during splitting operations.