Which action is NOT advised during torch operations?

The action that is not advised during torch operations is the use of flammable shields to protect surfaces. While the intent of such shields may be to prevent damage or injury, utilizing flammable materials as shields poses a significant fire risk. During torch operations, where temperatures can soar or sparks can fly, any shield that is not non-combustible can easily ignite, resulting in a potentially dangerous situation that could lead to fires or explosions.

On the other hand, keeping a fire extinguisher nearby is a standard safety precaution, ensuring that quick action can be taken should a fire occur. Providing a fire watch is also critical, as this person can monitor the torch operation and help in reacting swiftly to any signs of ignition. Conducting work with adequate ventilation is necessary to ensure that any fumes generated can disperse safely, maintaining air quality and reducing the risk of fire or explosion. Each of these actions contributes to the overall safety of torch operations, while the use of flammable shields directly contradicts fire safety best practices.