NGWA EXAM 2024\25 WITH
GUARATEED ACCURATE ANSWERS |
UPDATED
National Groundwater Assocation - ACCURATE ANSWERS✔✔
Water well defined - ACCURATE ANSWERS✔✔ Drilled, cored, bored,
washed, dug, driven, jetted excavation, constructed for extracting
groundwater.
Cable tool drill string - ACCURATE ANSWERS✔✔ Socket, jars, stem,
and drill bit.
Drill String - ACCURATE ANSWERS✔✔ Entire 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 - ACCURATE ANSWERS✔✔ Drill bit, Drill collar
(stabilizer), Drill pipe, Kelly (top head)
Porosity - ACCURATE ANSWERS✔✔ The percentage of void spaces
or holes in geologic formation. The amount of connected pore spaces
,Barite - ACCURATE ANSWERS✔✔ barium sulfate (BaSO4), a mineral
used to increase the weight of drilling fluid (mud); its specific gravity is
4.2
Air Rotary Drilling - ACCURATE ANSWERS✔✔ a method of rotary
drilling that uses compressed air as the circulating medium; compressed
air at high uphole velocity removes the cuttings
Surfactants - ACCURATE ANSWERS✔✔ 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 - ACCURATE ANSWERS✔✔ Unit of energy constant to
overcome gravity. Head calculation 2.31 X 40psi = 92.4' of lift. 600' /
2.31 = 260psi
Well Development - ACCURATE ANSWERS✔✔ a procedure to
facilitate the removal of fine solids and materials from the water-bearing
zone of a water well to optimize production
Well Development Methods - ACCURATE ANSWERS✔✔ Chemical,
Over pumping, Rawhiding (Washing and backwashing), Mechanical
Surging, Jetting, Air surging.
, Over Pumping - ACCURATE ANSWERS✔✔ Well Development
method; involves pumping well at a much higher rate than it will be
pumped during well evacuation or sampling.
Rawhiding (washing and back washing) - ACCURATE ANSWERS✔✔
Well Development method, involves pumping water to the top of the
well then allowing it to flow back through the intake of the pump,
breaking up the bridge of sediments only around the pump intake.
Mechanical Surging - ACCURATE ANSWERS✔✔ Well Development
method, involves attaching a surging block to the drill rod that fits well
inside diameter, then dropping the block rapidly, forcing the water back
up into the surrounding aquifer. In the recovery stroke water is lifted
back into the well allowing fine sediments to flow from the aquifer.
Jetting - ACCURATE ANSWERS✔✔ Well Development method,
involves attaching a surging block like tool with jetting nozzles, then
with an external water pressure supply jet the water back into the well
screen with in the well where it is most needed.
Air Surging - ACCURATE ANSWERS✔✔ Well Development method,
involves injecting air into the borehole such that aerated slugs of water
are lifted irregularly out the top of the well casing. Air pressure may be
cycled on and off to create a surging action desirable in well
development. Sufficient air pressure will result in a continuous flow of
aerated water out the top of the well, removing sediment and fine
particles from the borehole.
GUARATEED ACCURATE ANSWERS |
UPDATED
National Groundwater Assocation - ACCURATE ANSWERS✔✔
Water well defined - ACCURATE ANSWERS✔✔ Drilled, cored, bored,
washed, dug, driven, jetted excavation, constructed for extracting
groundwater.
Cable tool drill string - ACCURATE ANSWERS✔✔ Socket, jars, stem,
and drill bit.
Drill String - ACCURATE ANSWERS✔✔ Entire 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 - ACCURATE ANSWERS✔✔ Drill bit, Drill collar
(stabilizer), Drill pipe, Kelly (top head)
Porosity - ACCURATE ANSWERS✔✔ The percentage of void spaces
or holes in geologic formation. The amount of connected pore spaces
,Barite - ACCURATE ANSWERS✔✔ barium sulfate (BaSO4), a mineral
used to increase the weight of drilling fluid (mud); its specific gravity is
4.2
Air Rotary Drilling - ACCURATE ANSWERS✔✔ a method of rotary
drilling that uses compressed air as the circulating medium; compressed
air at high uphole velocity removes the cuttings
Surfactants - ACCURATE ANSWERS✔✔ 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 - ACCURATE ANSWERS✔✔ Unit of energy constant to
overcome gravity. Head calculation 2.31 X 40psi = 92.4' of lift. 600' /
2.31 = 260psi
Well Development - ACCURATE ANSWERS✔✔ a procedure to
facilitate the removal of fine solids and materials from the water-bearing
zone of a water well to optimize production
Well Development Methods - ACCURATE ANSWERS✔✔ Chemical,
Over pumping, Rawhiding (Washing and backwashing), Mechanical
Surging, Jetting, Air surging.
, Over Pumping - ACCURATE ANSWERS✔✔ Well Development
method; involves pumping well at a much higher rate than it will be
pumped during well evacuation or sampling.
Rawhiding (washing and back washing) - ACCURATE ANSWERS✔✔
Well Development method, involves pumping water to the top of the
well then allowing it to flow back through the intake of the pump,
breaking up the bridge of sediments only around the pump intake.
Mechanical Surging - ACCURATE ANSWERS✔✔ Well Development
method, involves attaching a surging block to the drill rod that fits well
inside diameter, then dropping the block rapidly, forcing the water back
up into the surrounding aquifer. In the recovery stroke water is lifted
back into the well allowing fine sediments to flow from the aquifer.
Jetting - ACCURATE ANSWERS✔✔ Well Development method,
involves attaching a surging block like tool with jetting nozzles, then
with an external water pressure supply jet the water back into the well
screen with in the well where it is most needed.
Air Surging - ACCURATE ANSWERS✔✔ Well Development method,
involves injecting air into the borehole such that aerated slugs of water
are lifted irregularly out the top of the well casing. Air pressure may be
cycled on and off to create a surging action desirable in well
development. Sufficient air pressure will result in a continuous flow of
aerated water out the top of the well, removing sediment and fine
particles from the borehole.
