Download NGWA General Drilling Exam Review Guide 2026 questions with answers and more Exams Construction in PDF only on Docsity!
NGWA |\General |\Drilling |\Exam |\Review |\
Guide |\ 2026 |\questions |\with |\answers
Artesian |\Pressure |- |\CORRECT |\ANSWERS |\✔✔Pressure |\from | confined |\groundwater |\due |\to |\gravity. Sandstones |- |\CORRECT |\ANSWERS |\✔✔Rocks |\formed |\from | ancient |\sand |\deposits. Limestones |- |\CORRECT |\ANSWERS |\✔✔Rocks |\containing |\fossils | from |\shallow |\seas. Shales |- |\CORRECT |\ANSWERS |\✔✔Rocks |\formed |\from |\ancient | clay |\beds. Sedimentary |\Formations |- |\CORRECT |\ANSWERS |\✔✔Rock | layers |\that |\can |\exceed |\one |\mile |\deep. Chain |\and |\Drive |\Shaft |\Guards |- |\CORRECT |\ANSWERS | ✔✔Safety |\devices |\that |\must |\remain |\in |\place.
Drilling |\Fluid |\Functions |- |\CORRECT |\ANSWERS |\✔✔Cool |\bits, | remove |\cuttings, |\stabilize |\holes. Preventative |\Maintenance |\Program |- |\CORRECT |\ANSWERS | ✔✔Enhances |\operators' |\understanding |\of |\equipment. Drilling |\Rig |\Fueling |- |\CORRECT |\ANSWERS |\✔✔Should |\occur | each |\morning |\before |\drilling. Engine |\Start |\Protocol |- |\CORRECT |\ANSWERS |\✔✔Engines |\must |\be |\neutral |\and |\clutches |\disengaged. Drilling |\Mud |\Design |- |\CORRECT |\ANSWERS |\✔✔Tailored |\for | specific |\well |\conditions. Wire |\Rope |\Wear |\Causes |- |\CORRECT |\ANSWERS | ✔✔Overloading, |\jerking, |\and |\kinking |\damage |\ropes. Large |\Column |\Screen |\Well |- |\CORRECT |\ANSWERS |\✔✔Requires |\sample |\analysis |\for |\proper |\construction. Pipe |\Diameter |\Increase |- |\CORRECT |\ANSWERS |\✔✔Allows | larger |\pumping |\equipment |\for |\better |\yield.
Cement |\Mixing |\for |\Seals |- |\CORRECT |\ANSWERS |\✔✔Dry | cement |\with |\water |\is |\not |\acceptable. Pressure |\Grouting |- |\CORRECT |\ANSWERS |\✔✔Requires |\grout | under |\pressure |\for |\effective |\sealing. Cement |\Grouting |\Technique |- |\CORRECT |\ANSWERS |\✔✔Use | tremie |\pipe |\for |\bottom-up |\placement. Grout |\Length |\Regulations |- |\CORRECT |\ANSWERS |\✔✔Laws | dictate |\minimum |\grout |\lengths |\for |\wells. Annular |\Space |\Grouting |- |\CORRECT |\ANSWERS |\✔✔Depends | on |\well |\drilling |\method |\used. Grouting |\Material |- |\CORRECT |\ANSWERS |\✔✔Neat |\cement |\is | preferred |\for |\grouting. Sanitary |\Surface |\Seal |\Requirement |- |\CORRECT |\ANSWERS | ✔✔Pitless |\adaptors |\still |\need |\surface |\seals. Water |\System |\Pressure |\Settings |- |\CORRECT |\ANSWERS | ✔✔Indicates |\pump |\start |\and |\shut-off |\pressures.
Water |\Weight |- |\CORRECT |\ANSWERS |\✔✔One |\gallon |\weighs | 8.34 |\pounds. Well |\Water |\Volume |\Calculation |- |\CORRECT |\ANSWERS | ✔✔150' |\well |\holds |\ 150 |\gallons |\of |\water. Gallons |\per |\Cubic |\Foot |- |\CORRECT |\ANSWERS |\✔✔One |\cubic | foot |\contains |\7.48 |\gallons. Water |\Pressure |\Measurement |- |\CORRECT |\ANSWERS | ✔✔Expressed |\in |\PSI |(pounds |\per |\square |\inch). Ground |\Water |\Flow |- |\CORRECT |\ANSWERS |\✔✔Flows |\downhill |\like |\surface |\water. Rock |\Types |- |\CORRECT |\ANSWERS |\✔✔Three |\main |\types: | igneous, |\sedimentary, |\metamorphic. Least |\Likely |\Water |\Source |- |\CORRECT |\ANSWERS |\✔✔Water | unlikely |\in |\granite |\formations.
Reverse |\Circulation |\Drilling |\Benefits |- |\CORRECT |\ANSWERS | ✔✔Maintains |\undisturbed |\porosity |\and |\permeability. Least |\Acceptable |\Drill |\Rig |- |\CORRECT |\ANSWERS |\✔✔Bucket | rig |\is |\unsuitable |\for |\consolidated |\shale. Cable |\Tool |\Rig |\Advantages |- |\CORRECT |\ANSWERS |\✔✔Offers | straightness, |\low |\maintenance, |\and |\cost |\efficiency. Mud |\Viscosity |\Estimation |- |\CORRECT |\ANSWERS |\✔✔Cannot | be |\accurately |\assessed |\by |\visual |\inspection. Cubic |\Foot |\to |\Gallons |- |\CORRECT |\ANSWERS |\✔✔One |\cubic | foot |\equals |\7.4805 |\gallons. Drawdown |\Definition |- |\CORRECT |\ANSWERS |\✔✔Difference | between |\static |\and |\pumping |\water |\levels. Well |\Development |\Procedures |- |\CORRECT |\ANSWERS |\✔✔Aim | to |\reduce |\sand |\concentration |\in |\water.
Development |\Water |\Additives |- |\CORRECT |\ANSWERS |\✔✔Use | sodium |\or |\calcium |\hypochlorite |\for |\better |\results. Aquifer |\Development |\Effectiveness |- |\CORRECT |\ANSWERS | ✔✔Can |\significantly |\increase |\water |\yields.
