NGWA - STUDY QUESTIONS - GENERAL
DRILLING EXAM (ANSWERED) CORRECTLY TO
SCORE A+
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.
- Some limestones contain fossils because they were once the mucky bottoms
- Shales were once clay beds.
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.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. 1 / 2
Prior to setting the rig, you should... 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
- Establishment of buddy system.
- Have driller's assistant check jacks as operator levels rig.
- Position rig for minimum leveling.
- Have driller's assistant check jacks as operator levels rig.
- / 2
requirements.Confined space entry rules require... Answer - 1. Shoring of trench walls over 4' deep.
In setting up and leveling the rig, the right procedure is to... Answer - 1. Use suitable jack pads for stabilization.
(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.