NGWA GENERAL DRILLING EXAM
Questions and Answers 2026 | Final
Revision Guide with Explanations |
A+ Verified
• What is true about the origin of rocks? -✓✓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. -✓✓True.
• The three main types of rock are... -✓✓... igneous, sedimentary, and
metamorphic.
• Water would be least likely found in what geological formation? -
✓✓Granite.
• (T/F) More than 90% of our nation's fresh water is underground? -
✓✓True.
, • Prior to setting the rig, you should... -✓✓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... -✓✓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... -✓✓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. -✓✓False.
• When considering the well site, the more important thing to consider
is the... -✓✓... place where it is least likely to be contaminated.
Questions and Answers 2026 | Final
Revision Guide with Explanations |
A+ Verified
• What is true about the origin of rocks? -✓✓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. -✓✓True.
• The three main types of rock are... -✓✓... igneous, sedimentary, and
metamorphic.
• Water would be least likely found in what geological formation? -
✓✓Granite.
• (T/F) More than 90% of our nation's fresh water is underground? -
✓✓True.
, • Prior to setting the rig, you should... -✓✓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... -✓✓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... -✓✓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. -✓✓False.
• When considering the well site, the more important thing to consider
is the... -✓✓... place where it is least likely to be contaminated.
