NGWA - Study Questions - General
Drilling Exam, Latest
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Artesian Pressure is generally... - ANSWER-✅✅... a result of gravity and confining
beds.
What is true about the origin of rocks? - ANSWER-✅✅1. Sandstones were once
sand deposits and could have been river sand, beach sands, or dune sands.
2. Some limestones contain fossils because they were once the mucky bottoms of
shallow seas.
3. Shales were once clay beds.
Sedimentary formations may reach depths of a mile or more.
(T/F) Ground water, like surface water, has a tendency to flow downhill. - ANSWER-
✅✅True.
The three main types of rock are... - ANSWER-✅✅... igneous, sedimentary, and
metamorphic.
Water would be least likely found in what geological formation? - ANSWER-
✅✅Granite.
, (T/F) More than 90% of our nation's fresh water is underground? - ANSWER-
✅✅True.
Prior to setting the rig, you should... - ANSWER-✅✅1. Make sure there are no
overhead power lines within at least 20' of the mast.
2. Locate all buried materials.
3. Verify you are on the right property and meet the correct setback requirements.
Confined space entry rules require... - ANSWER-✅✅1. Shoring of trench walls over
4' deep.
2. Establishment of buddy system.
3. Have driller's assistant check jacks as operator levels rig.
In setting up and leveling the rig, the right procedure is to... - ANSWER-✅✅1. Use
suitable jack pads for stabilization.
2. Position rig for minimum leveling.
3. Have driller's assistant check jacks as operator levels rig.
(T/F) A well may be used as sewage disposal site only if it is cased to the bottom of
the borehole. - ANSWER-✅✅False.
When considering the well site, the more important thing to consider is the... -
ANSWER-✅✅... place where it is least likely to be contaminated.
Air forced down the drill pipe... - ANSWER-✅✅... clears drill cuttings.
The best method to drill a domestic water supply well in cavernous hard rock would
be... - ANSWER-✅✅... cable tool.
The advantage(s) of reverse circulation drilling include(s)... - ANSWER-✅✅...
porosity and permeability are relatively undisturbed.
The following drill rig is the least acceptable to drill through a consolidated shale in
sandstone formation... - ANSWER-✅✅... a bucket rig.
(T/F) Cable tool rigs are advantageous for the following reasons:
1. Straightness of well.
2. Minimum maintenance.
3. Economical Use. - ANSWER-✅✅True.
(T/F) Drilling mud viscosity can be accurately estimated by visual inspection. -
ANSWER-✅✅False.
Chain and drive shaft guards... - ANSWER-✅✅... should be kept in place.
Drilling Exam, Latest
PremiumUltimate Update(2025-
2026),Already Graded A+, 100%
Guaranteed Success.
Artesian Pressure is generally... - ANSWER-✅✅... a result of gravity and confining
beds.
What is true about the origin of rocks? - ANSWER-✅✅1. Sandstones were once
sand deposits and could have been river sand, beach sands, or dune sands.
2. Some limestones contain fossils because they were once the mucky bottoms of
shallow seas.
3. Shales were once clay beds.
Sedimentary formations may reach depths of a mile or more.
(T/F) Ground water, like surface water, has a tendency to flow downhill. - ANSWER-
✅✅True.
The three main types of rock are... - ANSWER-✅✅... igneous, sedimentary, and
metamorphic.
Water would be least likely found in what geological formation? - ANSWER-
✅✅Granite.
, (T/F) More than 90% of our nation's fresh water is underground? - ANSWER-
✅✅True.
Prior to setting the rig, you should... - ANSWER-✅✅1. Make sure there are no
overhead power lines within at least 20' of the mast.
2. Locate all buried materials.
3. Verify you are on the right property and meet the correct setback requirements.
Confined space entry rules require... - ANSWER-✅✅1. Shoring of trench walls over
4' deep.
2. Establishment of buddy system.
3. Have driller's assistant check jacks as operator levels rig.
In setting up and leveling the rig, the right procedure is to... - ANSWER-✅✅1. Use
suitable jack pads for stabilization.
2. Position rig for minimum leveling.
3. Have driller's assistant check jacks as operator levels rig.
(T/F) A well may be used as sewage disposal site only if it is cased to the bottom of
the borehole. - ANSWER-✅✅False.
When considering the well site, the more important thing to consider is the... -
ANSWER-✅✅... place where it is least likely to be contaminated.
Air forced down the drill pipe... - ANSWER-✅✅... clears drill cuttings.
The best method to drill a domestic water supply well in cavernous hard rock would
be... - ANSWER-✅✅... cable tool.
The advantage(s) of reverse circulation drilling include(s)... - ANSWER-✅✅...
porosity and permeability are relatively undisturbed.
The following drill rig is the least acceptable to drill through a consolidated shale in
sandstone formation... - ANSWER-✅✅... a bucket rig.
(T/F) Cable tool rigs are advantageous for the following reasons:
1. Straightness of well.
2. Minimum maintenance.
3. Economical Use. - ANSWER-✅✅True.
(T/F) Drilling mud viscosity can be accurately estimated by visual inspection. -
ANSWER-✅✅False.
Chain and drive shaft guards... - ANSWER-✅✅... should be kept in place.
