NGWA EXAM ACTUAL 2025/2026 QUESTIONS AND 100% CORRECT ANSWERS

NGWA EXAM ACTUAL 2025/2026 QUESTIONS AND 100% CORRECT ANSWERS National Groundwater Assocation Water well defined Drilled, cored, bored, washed, dug, driven, jetted excavation, constructed for extracting groundwater. Cable tool drill string Socket, jars, stem, and drill bit. Drill StringEntire column of string or drill pipe,drill collars, and accessories that transmit fluid and/or rotational power from Kelly(top head drive) to the drill collars and bit. Rotary Drill string Drill bit, Drill collar (stabilizer), Drill pipe, Kelly (top head) Porosity The percentage of void spaces or holes in geologic formation. The amount of connected pore spaces Barite barium sulfate (BaSO4), a mineral used to increase the weight of drilling fluid (mud); its specific gravity is 4.2 Air Rotary Drillinga method of rotary drilling that uses compressed air as the circulating medium; compressed air at high uphole velocity removes the cuttings Surfactants Improve flushing of cuttings from bit. Used in air-based drilling to produce foam during well drilling, also well development to disaggregate clays 2.31