NGWA General Drilling Exam Study Questions With
Answers and Review Guide 2025-2026
NGWA General Drilling Exam Study Questions With
Answers and Review Guide 2025-2026
Artesian Pressure is generally... --- correct answer ---... a result of gravity
and confining beds.
What is true about the origin of rocks? --- correct 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. ---
correct answer ---True.
The three main types of rock are... --- correct answer ---... igneous,
sedimentary, and metamorphic.
Water would be least likely found in what geological formation? --- correct
answer ---Granite.
, NGWA General Drilling Exam Study Questions With
Answers and Review Guide 2025-2026
(T/F) More than 90% of our nation's fresh water is underground? ---
correct answer ---True.
Prior to setting the rig, you should... --- correct 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... --- correct 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... --- correct
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. --- correct answer ---False.
Answers and Review Guide 2025-2026
NGWA General Drilling Exam Study Questions With
Answers and Review Guide 2025-2026
Artesian Pressure is generally... --- correct answer ---... a result of gravity
and confining beds.
What is true about the origin of rocks? --- correct 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. ---
correct answer ---True.
The three main types of rock are... --- correct answer ---... igneous,
sedimentary, and metamorphic.
Water would be least likely found in what geological formation? --- correct
answer ---Granite.
, NGWA General Drilling Exam Study Questions With
Answers and Review Guide 2025-2026
(T/F) More than 90% of our nation's fresh water is underground? ---
correct answer ---True.
Prior to setting the rig, you should... --- correct 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... --- correct 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... --- correct
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. --- correct answer ---False.
