NEBOSH Practice Test

What factor can reduce the risk of electrostatic charge during liquid transfer?

1. Increased flow rate

2. Submerging the fill pipe below the liquid level

3. Using lightweight containers

4. Conductive footwear

The correct answer is: Submerging the fill pipe below the liquid level

Submerging the fill pipe below the liquid level is effective in reducing the risk of electrostatic charge during liquid transfer because it minimizes turbulence and splashing at the surface of the liquid. When the fill pipe is above the liquid surface, the flow of liquid can create turbulence, which leads to the generation of static electricity as the liquid and air come into contact and interact. By immersing the fill pipe beneath the liquid surface, this interaction is significantly reduced, thus lowering the likelihood of static charge accumulation. In addition, submerging the fill pipe helps to ensure that liquid flows smoothly into the container, reducing the risk of generating static through frictional forces. This practice is crucial in industries handling flammable liquids, where even a small spark from static electricity can pose serious safety hazards. While other options might have their relevance in safety protocols, they do not address the generation of electrostatic charge during liquid transfer as effectively as submerging the fill pipe does.