NGWA GENERAL DRILLING EXAM REVIEW GUIDE 2026 ACTUAL
QUESTIONS WITH VERIFIED SOLUTIONS.
Artesian Pressure - (ANSWER)Pressure from confined groundwater due to gravity.
Sandstones - (ANSWER)Rocks formed from ancient sand deposits.
Limestones - (ANSWER)Rocks containing fossils from shallow seas.
Shales - (ANSWER)Rocks formed from ancient clay beds.
Sedimentary Formations - (ANSWER)Rock layers that can exceed one mile deep.
Chain and Drive Shaft Guards - (ANSWER)Safety devices that must remain in place.
Drilling Fluid Functions - (ANSWER)Cool bits, remove cuttings, stabilize holes.
Preventative Maintenance Program - (ANSWER)Enhances operators' understanding of equipment.
Drilling Rig Fueling - (ANSWER)Should occur each morning before drilling.
Engine Start Protocol - (ANSWER)Engines must be neutral and clutches disengaged.
Drilling Mud Design - (ANSWER)Tailored for specific well conditions.
Wire Rope Wear Causes - (ANSWER)Overloading, jerking, and kinking damage ropes.
Large Column Screen Well - (ANSWER)Requires sample analysis for proper construction.
, NGWA GENERAL DRILLING EXAM REVIEW GUIDE 2026 ACTUAL
QUESTIONS WITH VERIFIED SOLUTIONS.
Pipe Diameter Increase - (ANSWER)Allows larger pumping equipment for better yield.
Qualified Well Designer - (ANSWER)Hydrogeologist is most qualified for design.
Well Screen Intake Velocity - (ANSWER)Should be less than 1 foot/second.
Reduced Yield Causes - (ANSWER)Screen incrustation can decrease water yield.
Screen Diameter Effect - (ANSWER)Doubling diameter increases capacity by 7-10%.
Sample Collection Importance - (ANSWER)Helps correlate formations across different areas.
Well Screen Functions - (ANSWER)Filters water and prevents sediment entry.
Gravel-Packed Wells - (ANSWER)Must be sealed at gravel pack top.
Cement Mixing for Seals - (ANSWER)Dry cement with water is not acceptable.
Pressure Grouting - (ANSWER)Requires grout under pressure for effective sealing.
Cement Grouting Technique - (ANSWER)Use tremie pipe for bottom-up placement.
Grout Length Regulations - (ANSWER)Laws dictate minimum grout lengths for wells.
Annular Space Grouting - (ANSWER)Depends on well drilling method used.
QUESTIONS WITH VERIFIED SOLUTIONS.
Artesian Pressure - (ANSWER)Pressure from confined groundwater due to gravity.
Sandstones - (ANSWER)Rocks formed from ancient sand deposits.
Limestones - (ANSWER)Rocks containing fossils from shallow seas.
Shales - (ANSWER)Rocks formed from ancient clay beds.
Sedimentary Formations - (ANSWER)Rock layers that can exceed one mile deep.
Chain and Drive Shaft Guards - (ANSWER)Safety devices that must remain in place.
Drilling Fluid Functions - (ANSWER)Cool bits, remove cuttings, stabilize holes.
Preventative Maintenance Program - (ANSWER)Enhances operators' understanding of equipment.
Drilling Rig Fueling - (ANSWER)Should occur each morning before drilling.
Engine Start Protocol - (ANSWER)Engines must be neutral and clutches disengaged.
Drilling Mud Design - (ANSWER)Tailored for specific well conditions.
Wire Rope Wear Causes - (ANSWER)Overloading, jerking, and kinking damage ropes.
Large Column Screen Well - (ANSWER)Requires sample analysis for proper construction.
, NGWA GENERAL DRILLING EXAM REVIEW GUIDE 2026 ACTUAL
QUESTIONS WITH VERIFIED SOLUTIONS.
Pipe Diameter Increase - (ANSWER)Allows larger pumping equipment for better yield.
Qualified Well Designer - (ANSWER)Hydrogeologist is most qualified for design.
Well Screen Intake Velocity - (ANSWER)Should be less than 1 foot/second.
Reduced Yield Causes - (ANSWER)Screen incrustation can decrease water yield.
Screen Diameter Effect - (ANSWER)Doubling diameter increases capacity by 7-10%.
Sample Collection Importance - (ANSWER)Helps correlate formations across different areas.
Well Screen Functions - (ANSWER)Filters water and prevents sediment entry.
Gravel-Packed Wells - (ANSWER)Must be sealed at gravel pack top.
Cement Mixing for Seals - (ANSWER)Dry cement with water is not acceptable.
Pressure Grouting - (ANSWER)Requires grout under pressure for effective sealing.
Cement Grouting Technique - (ANSWER)Use tremie pipe for bottom-up placement.
Grout Length Regulations - (ANSWER)Laws dictate minimum grout lengths for wells.
Annular Space Grouting - (ANSWER)Depends on well drilling method used.
