Why should grounding and bonding be used during AFFF concentrate transfer?

Why should grounding and bonding be used during AFFF concentrate transfer?

• A. To reduce weight of hoses
• B. To color-code connections
• C. To prevent static discharge and minimize ignition risk
• D. To accelerate chemical reaction

Answer: (C)

Grounding and bonding during AFFF concentrate transfer are used to prevent static electricity buildup and reduce ignition risk. As liquid moves through hoses, especially with concentrates that may have low electrical conductivity, it can become electrically charged. If there’s a difference in electrical potential between the source container, hoses, and the receiving vessel, a spark could occur when connections are made, broken, or touched. Creating a bond between all conductive parts ensures they are at the same electrical potential, and grounding provides a path to safely dissipate any built-up charge to the earth. Together, these practices minimize the chance of a static discharge igniting flammable vapors. The other options don’t address this safety risk: grounding and bonding are not about making hoses lighter, color-coding is a separate safety step, and they do not cause any chemical reaction to speed up.

Grounding and bonding during AFFF concentrate transfer are used to prevent static electricity buildup and reduce ignition risk. As liquid moves through hoses, especially with concentrates that may have low electrical conductivity, it can become electrically charged. If there’s a difference in electrical potential between the source container, hoses, and the receiving vessel, a spark could occur when connections are made, broken, or touched. Creating a bond between all conductive parts ensures they are at the same electrical potential, and grounding provides a path to safely dissipate any built-up charge to the earth. Together, these practices minimize the chance of a static discharge igniting flammable vapors.

The other options don’t address this safety risk: grounding and bonding are not about making hoses lighter, color-coding is a separate safety step, and they do not cause any chemical reaction to speed up.