MGWC Practice Questions - NGWA Master Groundwater Contractor Exam

What is the purpose of setting a surface casing in a newly drilled water well?

To seal off shallow contaminated zones and prevent surface water from entering the annulus To maximize the open-hole diameter for pump installation To prevent artesian pressure from lifting the production casing To reduce the total depth needed to reach the water-bearing zone

Correct Answer:

To seal off shallow contaminated zones and prevent surface water from entering the annulus

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