What permits are required when a technician needs to execute electric welding on a pressurized hydraulic pipeline located inside an empty fresh water tank?

Answer & Explanation

The correct answer is Option D: All of the above.

Welding is 'Hot Work', the pipeline is 'Pressure/Hydraulic' work, and the tank is a 'Confined Space'. Each of these conditions poses unique risks, requiring specific permits, risk assessments, and isolation procedures to ensure safety before work commences.