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NGWA - STUDY QUESTIONS - GENERAL
DRILLING EXAM
EXAM WITH CORRECT SOLUTIONS.
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.
- Some limestones contain fossils because they were once the
- Shales were once clay beds.
mucky bottoms of shallow seas.
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.
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Water would be least likely found in what geological formation?
- correct answer- Granite.
(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.
- Locate all buried materials.
- 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.
- Establishment of buddy system.
- 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.
- Position rig for minimum leveling.
- Have driller's assistant check jacks as operator levels rig.
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