NGWA EXAM WITH FULL PACK SOLUTIONS
1.National hGroundwater hAssocation:
2.Water hwell hdefined: hDrilled, hcored, hbored, hwashed, hdug, hdriven, hjetted
hexcavation, hconstructed hfor hextracting hgroundwater.
3.Cable htool hdrill hstring: hSocket, hjars, hstem, hand hdrill hbit.
4.Drill hString: hEntire hcolumn hof hstring hor hdrill hpipe,drill hcollars, hand
haccessories hthat htransmit hfluid hand/or hrotational hpower hfrom
hKelly(top hhead hdrive) hto hthe hdrill hcollars hand hbit.
5.Rotary hDrill hstring: hDrill hbit, hDrill hcollar h(stabilizer), hDrill hpipe, hKelly
h(top hhead)
6.Porosity: hThe hpercentage hof hvoid hspaces hor hholes hin hgeologic
hformation. hThe hamount hof hconnected hpore hspaces
7.Barite: hbarium hsulfate h(BaSO4), ha hmineral hused hto hincrease hthe
hweight hof hdrilling hfluid h(mud); hits hspecific hgravity his h4.2
1 h/
h13
, 8.Air hRotary hDrilling: ha hmethod hof hrotary hdrilling hthat huses
hcompressed hair has hthe hcirculating hmedium; hcompressed hair hat hhigh
huphole hvelocity hremoves hthe hcuttings
9.Surfactants: hImprove hflushing hof hcuttings hfrom hbit. hUsed hin hair-
based hdrilling hto hproduce hfoam hduring hwell hdrilling, halso hwell
hdevelopment hto hdisaggregate hclays
10.2.31: hUnit hof henergy hconstant hto hovercome hgravity. hHead hcalculation
h2.31 hX h40psi
= h92.4' hof hlift. h600' h/ h2.31 h= h260psi
11.Well hDevelopment: ha hprocedure hto hfacilitate hthe hremoval hof
hfine hsolids hand hmaterials hfrom hthe hwater-bearing hzone hof ha
hwater hwell hto hoptimize hproduction
12.Well hDevelopment hMethods: hChemical, hOver hpumping, hRawhiding
h(Washing hand hbackwashing), hMechanical hSurging, hJetting, hAir
hsurging.
13.Over hPumping: hWell hDevelopment hmethod; hinvolves hpumping
hwell hat ha hmuch hhigher hrate hthan hit hwill hbe hpumped hduring hwell
hevacuation hor hsampling.
14.Rawhiding h(washing hand hback hwashing): hWell hDevelopment hmethod,
hinvolves hpumping hwater hto hthe htop hof hthe hwell hthen hallowing hit hto
hflow hback hthrough hthe hintake hof hthe hpump, hbreaking hup hthe hbridge
hof hsediments honly haround hthe hpump hintake.
15.Mechanical hSurging: hWell hDevelopment hmethod, hinvolves hattaching
ha hsurging hblock hto hthe hdrill hrod hthat hfits hwell hinside hdiameter, hthen
hdropping hthe hblock hrapidly, hforcing hthe hwater hback hup hinto hthe
hsurrounding haquifer. hIn hthe hrecovery hstroke hwater his hlifted hback hinto
hthe hwell hallowing hfine hsediments hto hflow hfrom hthe haquifer.
2 h/
h13
1.National hGroundwater hAssocation:
2.Water hwell hdefined: hDrilled, hcored, hbored, hwashed, hdug, hdriven, hjetted
hexcavation, hconstructed hfor hextracting hgroundwater.
3.Cable htool hdrill hstring: hSocket, hjars, hstem, hand hdrill hbit.
4.Drill hString: hEntire hcolumn hof hstring hor hdrill hpipe,drill hcollars, hand
haccessories hthat htransmit hfluid hand/or hrotational hpower hfrom
hKelly(top hhead hdrive) hto hthe hdrill hcollars hand hbit.
5.Rotary hDrill hstring: hDrill hbit, hDrill hcollar h(stabilizer), hDrill hpipe, hKelly
h(top hhead)
6.Porosity: hThe hpercentage hof hvoid hspaces hor hholes hin hgeologic
hformation. hThe hamount hof hconnected hpore hspaces
7.Barite: hbarium hsulfate h(BaSO4), ha hmineral hused hto hincrease hthe
hweight hof hdrilling hfluid h(mud); hits hspecific hgravity his h4.2
1 h/
h13
, 8.Air hRotary hDrilling: ha hmethod hof hrotary hdrilling hthat huses
hcompressed hair has hthe hcirculating hmedium; hcompressed hair hat hhigh
huphole hvelocity hremoves hthe hcuttings
9.Surfactants: hImprove hflushing hof hcuttings hfrom hbit. hUsed hin hair-
based hdrilling hto hproduce hfoam hduring hwell hdrilling, halso hwell
hdevelopment hto hdisaggregate hclays
10.2.31: hUnit hof henergy hconstant hto hovercome hgravity. hHead hcalculation
h2.31 hX h40psi
= h92.4' hof hlift. h600' h/ h2.31 h= h260psi
11.Well hDevelopment: ha hprocedure hto hfacilitate hthe hremoval hof
hfine hsolids hand hmaterials hfrom hthe hwater-bearing hzone hof ha
hwater hwell hto hoptimize hproduction
12.Well hDevelopment hMethods: hChemical, hOver hpumping, hRawhiding
h(Washing hand hbackwashing), hMechanical hSurging, hJetting, hAir
hsurging.
13.Over hPumping: hWell hDevelopment hmethod; hinvolves hpumping
hwell hat ha hmuch hhigher hrate hthan hit hwill hbe hpumped hduring hwell
hevacuation hor hsampling.
14.Rawhiding h(washing hand hback hwashing): hWell hDevelopment hmethod,
hinvolves hpumping hwater hto hthe htop hof hthe hwell hthen hallowing hit hto
hflow hback hthrough hthe hintake hof hthe hpump, hbreaking hup hthe hbridge
hof hsediments honly haround hthe hpump hintake.
15.Mechanical hSurging: hWell hDevelopment hmethod, hinvolves hattaching
ha hsurging hblock hto hthe hdrill hrod hthat hfits hwell hinside hdiameter, hthen
hdropping hthe hblock hrapidly, hforcing hthe hwater hback hup hinto hthe
hsurrounding haquifer. hIn hthe hrecovery hstroke hwater his hlifted hback hinto
hthe hwell hallowing hfine hsediments hto hflow hfrom hthe haquifer.
2 h/
h13
