What should be used to plug a tube at either end of a well to prevent air circulation?

What should be used to plug a tube at either end of a well to prevent air circulation?

• A. Purge paper
• B. Rubber plug
• C. Cork
• D. Tape

Answer: (A)

Sealing the purge tube ends to stop air from circulating during well testing is done with a material that forms a quick, airtight temporary seal. Purge paper is designed for this exact purpose: it fits into narrow tube ends, expands to block air, and can be inserted and removed easily without leaving residue or causing damage. It creates a reliable seal during purging or sampling, helping prevent backflow and contamination of the sample. Rubber plugs can be bulky or difficult to fit precisely, may trap moisture, and can be hard to remove if pressed far into the tube. Cork tends to degrade or absorb moisture in a wet well environment, making it less reliable for a consistent seal. Tape might seem convenient, but it doesn’t provide a true airtight seal and can leave adhesive residue or lose its grip under pressure, compromising the seal. So the best choice for preventing air circulation in this setup is purge paper because it gives a clean, dependable seal that’s easy to apply and remove.

Sealing the purge tube ends to stop air from circulating during well testing is done with a material that forms a quick, airtight temporary seal. Purge paper is designed for this exact purpose: it fits into narrow tube ends, expands to block air, and can be inserted and removed easily without leaving residue or causing damage. It creates a reliable seal during purging or sampling, helping prevent backflow and contamination of the sample.

Rubber plugs can be bulky or difficult to fit precisely, may trap moisture, and can be hard to remove if pressed far into the tube. Cork tends to degrade or absorb moisture in a wet well environment, making it less reliable for a consistent seal. Tape might seem convenient, but it doesn’t provide a true airtight seal and can leave adhesive residue or lose its grip under pressure, compromising the seal.

So the best choice for preventing air circulation in this setup is purge paper because it gives a clean, dependable seal that’s easy to apply and remove.