NGWA
NGWA General General Drilling Drilling ExamExam Review
Review Guide 2025 Guide 2025
UPDATE!!
Study online at https://quizlet.com/_hbqrgx
1. Artesian Pressure Pressure from confined groundwater due to gravity.
2. Sandstones Rocks formed from ancient sand deposits.
3. Limestones Rocks containing fossils from shallow seas.
4. Shales Rocks formed from ancient clay beds.
5. Sedimentary Formations Rock layers that can exceed one mile deep.
6. Chain and Drive Shaft Guards Safety devices that must remain in place.
7. Drilling Fluid Functions Cool bits, remove cuttings, stabilize holes.
8. Preventative Maintenance Pro- Enhances operators' understanding of equipment.
gram
9. Drilling Rig Fueling Should occur each morning before drilling.
10. Engine Start Protocol Engines must be neutral and clutches disengaged.
11. Drilling Mud Design Tailored for specific well conditions.
12. Wire Rope Wear Causes Overloading, jerking, and kinking damage ropes.
13. Large Column Screen Well Requires sample analysis for proper construction.
14. Pipe Diameter Increase Allows larger pumping equipment for better yield.
15. Qualified Well Designer Hydrogeologist is most qualified for design.
16. Well Screen Intake Velocity Should be less than 1 foot/second.
17. Reduced Yield Causes Screen incrustation can decrease water yield.
18. Screen Diameter Effect Doubling diameter increases capacity by 7-10%.
1/4
NGWA General General Drilling Drilling ExamExam Review
Review Guide 2025 Guide 2025
UPDATE!!
Study online at https://quizlet.com/_hbqrgx
1. Artesian Pressure Pressure from confined groundwater due to gravity.
2. Sandstones Rocks formed from ancient sand deposits.
3. Limestones Rocks containing fossils from shallow seas.
4. Shales Rocks formed from ancient clay beds.
5. Sedimentary Formations Rock layers that can exceed one mile deep.
6. Chain and Drive Shaft Guards Safety devices that must remain in place.
7. Drilling Fluid Functions Cool bits, remove cuttings, stabilize holes.
8. Preventative Maintenance Pro- Enhances operators' understanding of equipment.
gram
9. Drilling Rig Fueling Should occur each morning before drilling.
10. Engine Start Protocol Engines must be neutral and clutches disengaged.
11. Drilling Mud Design Tailored for specific well conditions.
12. Wire Rope Wear Causes Overloading, jerking, and kinking damage ropes.
13. Large Column Screen Well Requires sample analysis for proper construction.
14. Pipe Diameter Increase Allows larger pumping equipment for better yield.
15. Qualified Well Designer Hydrogeologist is most qualified for design.
16. Well Screen Intake Velocity Should be less than 1 foot/second.
17. Reduced Yield Causes Screen incrustation can decrease water yield.
18. Screen Diameter Effect Doubling diameter increases capacity by 7-10%.
1/4
