NGWA General Drilling Exam Review Guide 2025
/2026 EXAM QUESTIONS WITH SOLVED ANSWERS .
Air in Drill Pipe - CORRECT ANSWER✅✅Clears drill cuttings during operation.
Annular Space Grouting - CORRECT ANSWER✅✅Depends on well drilling method
used.
Aquifer Development Effectiveness - CORRECT ANSWER✅✅Can significantly
increase water yields.
Artesian Pressure - CORRECT ANSWER✅✅Pressure from confined groundwater due
to gravity.
Cable Tool Rig Advantages - CORRECT ANSWER✅✅Offers straightness, low
maintenance, and cost efficiency.
Cement Grouting Technique - CORRECT ANSWER✅✅Use tremie pipe for bottom-up
placement.
Cement Mixing for Seals - CORRECT ANSWER✅✅Dry cement with water is not
acceptable.
Chain and Drive Shaft Guards - CORRECT ANSWER✅✅Safety devices that must
remain in place.
Confined Space Entry Rules - CORRECT ANSWER✅✅Require trench shoring over 4
feet deep.
Cubic Foot to Gallons - CORRECT ANSWER✅✅One cubic foot equals 7.4805 gallons.
Development Water Additives - CORRECT ANSWER✅✅Use sodium or calcium
hypochlorite for better results.
Domestic Water Well Drilling - CORRECT ANSWER✅✅Cable tool is best for hard
rock.
Drawdown Definition - CORRECT ANSWER✅✅Difference between static and pumping
water levels.
/2026 EXAM QUESTIONS WITH SOLVED ANSWERS .
Air in Drill Pipe - CORRECT ANSWER✅✅Clears drill cuttings during operation.
Annular Space Grouting - CORRECT ANSWER✅✅Depends on well drilling method
used.
Aquifer Development Effectiveness - CORRECT ANSWER✅✅Can significantly
increase water yields.
Artesian Pressure - CORRECT ANSWER✅✅Pressure from confined groundwater due
to gravity.
Cable Tool Rig Advantages - CORRECT ANSWER✅✅Offers straightness, low
maintenance, and cost efficiency.
Cement Grouting Technique - CORRECT ANSWER✅✅Use tremie pipe for bottom-up
placement.
Cement Mixing for Seals - CORRECT ANSWER✅✅Dry cement with water is not
acceptable.
Chain and Drive Shaft Guards - CORRECT ANSWER✅✅Safety devices that must
remain in place.
Confined Space Entry Rules - CORRECT ANSWER✅✅Require trench shoring over 4
feet deep.
Cubic Foot to Gallons - CORRECT ANSWER✅✅One cubic foot equals 7.4805 gallons.
Development Water Additives - CORRECT ANSWER✅✅Use sodium or calcium
hypochlorite for better results.
Domestic Water Well Drilling - CORRECT ANSWER✅✅Cable tool is best for hard
rock.
Drawdown Definition - CORRECT ANSWER✅✅Difference between static and pumping
water levels.
