Water Well Drilling 101 for General Exam –
2025/2026 Updated Study Guide & Practice
Questions | 100% Pass Guarantee
Well construction is comprised of the following componets? - correct answerdrilling,
installation of casing, placing well screens, grouting, DEVELOPMENT
Minimum grouting distance? - correct answer10' is code
Artesian Well - correct answerArtesian pressure is the result of gravity and the confining
Aquifer
Artesian Well Layers - correct answerCONFINING Layer (top)
CONFINED AQUIFER (middle)
IMPERMEABLE Layer (bottom)
Types of drilling techniques - correct answerCable tool, Air rotary, Mud rotary, Reverse
circulation rotary, Jetting & Driving
GROUTING - correct answerIS THE ACT OF INJECTING CERTAIN SUBSTANCES
INTO VOID SPACE TO REDUCE OR ELIMINATE THEIR PERMEABILITY,
CONSOLIDATE OR INCREASE THEIR STRENGTH.
(Filling space between the casing and bore hole with cement or clay)
Methods of Grouting include - correct answerTremie pipe outside casing,
Tremie pipe inside casing,
Casing method or Halliburton method
Neat Cement Ratio - correct answerCement and Water, 5.5 to 6gal of h20 to 1 cubic
foot of Portland cement with 3% bentonite to prevent shrinkage
Tremie Pipe Outside Casing - correct answerGrout placed through small pipe outside
casing,
Centering guides are placed along length of casing,
Lower end of casing has drillable plug,
Casing held down by rig so it doesn't float,
Shallow wells a positive displacement pump can be used.
Tremie Pipe Inside Casing - correct answerGrout Pipe installed temporarily inside
casing,
Cement plug or float attached at the bottom of the casing,
, Casing is filled with water and grout pumped through pipe,
Casing must be cleaned of all debris after grouting
Well Screens - correct answerFiltering device allowing water while holding back sand,
.006 TO .250
Important Screen Functions - correct answerEASILY DEVELOPED,
MINIMAL INCRUSTING TENDENCY,
LOW HEAD LOST THROUGH SCREEN,
CONTROLS SAND PUMPING IN MANY DIFFERENT AQUIFERS
Well Screen Basics - correct answerDOUBLING THE DIAMETER OF A SCREEN WILL
ONLY INCREASE THE YEILD BY 7 TO 10%
Screen length based on aquifer thickness
Well Abandonment - correct answerFilling Bore hole so water cannot be obtained from
well, (NEAT CEMENT, BENITE)
ACCEPTABLE METHODS ARE OUTLINED IN AWWA 10 STATE STANDARDS
Problems with older wells - correct answerYEILD REDUCTION, PLUGGING OF
FORMATION, SAND PUMPING
Reduction in Well Yield caused by - correct answerIMPROPER DEVELOPMENT,
IMPROPER CONSTRUCTION, IMPROPER SCREEN DESIGN, INCRUSTATION
Aquifer Development - correct answerCAN INCREASE WELL YEILD
Redevelopment of existing wells - correct answerCAN BRING BACK 95% OF THEIR
ORIGINAL CAPACITY (FRACK/POUNDER WITH SURGE BLOCK)
Vacuum Occurs - correct answerin wells when not PROPERLY VENTED
Confined Space - correct answerA space NOT DESIGNED FOR CONTINUOUS
HUMAN OCCUPANCY,
LIMITED MEANS OF ENTRY OR EXIT,
LARGE ENOUGH TO PERFORM WORK
Confined space examples - correct answervaults, tanks, crawl spaces, diked areas,
trenches, enclosed rooms, manholes, ducts, ect.
Electrocution - correct answerConsider all electric lines to be alive and dangerous,
NATION RECOMMENDED CLEARANCE IS 20 FEET
(hop two feet together or shuffle to get away)
Excavations - correct answerOsha requirements are for excavation and trenches 4 feet
or more in depth
2025/2026 Updated Study Guide & Practice
Questions | 100% Pass Guarantee
Well construction is comprised of the following componets? - correct answerdrilling,
installation of casing, placing well screens, grouting, DEVELOPMENT
Minimum grouting distance? - correct answer10' is code
Artesian Well - correct answerArtesian pressure is the result of gravity and the confining
Aquifer
Artesian Well Layers - correct answerCONFINING Layer (top)
CONFINED AQUIFER (middle)
IMPERMEABLE Layer (bottom)
Types of drilling techniques - correct answerCable tool, Air rotary, Mud rotary, Reverse
circulation rotary, Jetting & Driving
GROUTING - correct answerIS THE ACT OF INJECTING CERTAIN SUBSTANCES
INTO VOID SPACE TO REDUCE OR ELIMINATE THEIR PERMEABILITY,
CONSOLIDATE OR INCREASE THEIR STRENGTH.
(Filling space between the casing and bore hole with cement or clay)
Methods of Grouting include - correct answerTremie pipe outside casing,
Tremie pipe inside casing,
Casing method or Halliburton method
Neat Cement Ratio - correct answerCement and Water, 5.5 to 6gal of h20 to 1 cubic
foot of Portland cement with 3% bentonite to prevent shrinkage
Tremie Pipe Outside Casing - correct answerGrout placed through small pipe outside
casing,
Centering guides are placed along length of casing,
Lower end of casing has drillable plug,
Casing held down by rig so it doesn't float,
Shallow wells a positive displacement pump can be used.
Tremie Pipe Inside Casing - correct answerGrout Pipe installed temporarily inside
casing,
Cement plug or float attached at the bottom of the casing,
, Casing is filled with water and grout pumped through pipe,
Casing must be cleaned of all debris after grouting
Well Screens - correct answerFiltering device allowing water while holding back sand,
.006 TO .250
Important Screen Functions - correct answerEASILY DEVELOPED,
MINIMAL INCRUSTING TENDENCY,
LOW HEAD LOST THROUGH SCREEN,
CONTROLS SAND PUMPING IN MANY DIFFERENT AQUIFERS
Well Screen Basics - correct answerDOUBLING THE DIAMETER OF A SCREEN WILL
ONLY INCREASE THE YEILD BY 7 TO 10%
Screen length based on aquifer thickness
Well Abandonment - correct answerFilling Bore hole so water cannot be obtained from
well, (NEAT CEMENT, BENITE)
ACCEPTABLE METHODS ARE OUTLINED IN AWWA 10 STATE STANDARDS
Problems with older wells - correct answerYEILD REDUCTION, PLUGGING OF
FORMATION, SAND PUMPING
Reduction in Well Yield caused by - correct answerIMPROPER DEVELOPMENT,
IMPROPER CONSTRUCTION, IMPROPER SCREEN DESIGN, INCRUSTATION
Aquifer Development - correct answerCAN INCREASE WELL YEILD
Redevelopment of existing wells - correct answerCAN BRING BACK 95% OF THEIR
ORIGINAL CAPACITY (FRACK/POUNDER WITH SURGE BLOCK)
Vacuum Occurs - correct answerin wells when not PROPERLY VENTED
Confined Space - correct answerA space NOT DESIGNED FOR CONTINUOUS
HUMAN OCCUPANCY,
LIMITED MEANS OF ENTRY OR EXIT,
LARGE ENOUGH TO PERFORM WORK
Confined space examples - correct answervaults, tanks, crawl spaces, diked areas,
trenches, enclosed rooms, manholes, ducts, ect.
Electrocution - correct answerConsider all electric lines to be alive and dangerous,
NATION RECOMMENDED CLEARANCE IS 20 FEET
(hop two feet together or shuffle to get away)
Excavations - correct answerOsha requirements are for excavation and trenches 4 feet
or more in depth
