NGWA General Drilling & Augering
& Monitoring Well Complete Exam
Study Questions with Expert
Graded A+ Answers
1. The primary item which dictates the type of drilling equipment to be used on
a site is... - ANSWER ... geology.
2. The commonly used hollow-stem auger system for monitoring well
installations... - ANSWER ... should include an auger head than can be
machined to accent a plate that facilitates well installation below the ground
water level.
3. The drilling method used to construct a monitoring well should... -
ANSWER ... minimize disturbance of subsurface materials
4. The "auger fork" is a device that slips through the flights of the auger
column and... - ANSWER ... keeps the augers from "sliding" back into the
borehole when removing the augers from the borehole.
5. For drilling operations at a hazardous waste site, the exclusion zone is... -
ANSWER ... the area on-site that is potentially contaminated and where
workers must wear PPE as stipulated in the site specific health and safety
plan.
6. An advantage of using hollow-stem augers is... - ANSWER ... no drilling
fluid is used, eliminating contamination by drilling fluid additives.
,7. A disadvantage of using cable tool drilling for monitoring wells is... -
ANSWER ... possible problems in controlling heaving sands.
8. Air in the discharge line of a recovery well system could be caused by... -
ANSWER Hole in drop pipe
Cascading water
Plugged screen and cavitation
9. Contamination from the cement grout leaking into the filter pack may be
indicated by... - ANSWER ... high pH.
10.Prior to leaving a hazardous waste site, decontamination is done in order to...
- ANSWER ... make sure no contamination leaves the site.
11.What is the method for removing sand that has entered the hollow-stem
auger after you have drilled below the water table? - ANSWER Wash the
sand out with approved water.
12.When the drill cuttings exceed the volume of the borehole while hollow-
stem auger drilling, you have usually... - ANSWER ... encountered flowing
sand.
13.Hollow-stem augers are commonly used to install wells because... -
ANSWER ... soil sampling is easy and accurate in most cases.
14.Proper screen selection for a ground water monitoring well should include...
- ANSWER ... slot size matched to filter pack material.
, 15.Of the methods listed, which is the best method of obtaining soil samples
during the drilling of a monitoring well? - ANSWER Using a Shelby tube
and/or split spoon sampler.
16.Monitoring wells used to sample ground water should always be... -
ANSWER 1. Installed with great care to avoid contamination from the
drilling process
2. Installed to protect the well from surface pollution.
3. Protected with secure well protective covers.
17.In order to establish project expectations, the drilling contractor should... -
ANSWER 1. Request and review the statement of work.
2. Discuss project specifics with the project manager.
3. Outline the statement of work with the drill crew.
18.Observations made during performance of contract work at a drilling and
monitoring site, such as unusual soil odor or color (of samples)... -
ANSWER ... are essentially the property of the person paying for the
investigation and who has the responsibility to take action as necessary to
protect the public.
19.Federal Motor Carrier safety regulations require the driver of a CMV of
10,001 lbs. combined weight or over to have... - ANSWER ... a medical
card and valid driver's license.
20.Personal protection requirements for working at a hazardous waste site are
broken down in four levels A thru D with... - ANSWER ... level A being the
most protective.
& Monitoring Well Complete Exam
Study Questions with Expert
Graded A+ Answers
1. The primary item which dictates the type of drilling equipment to be used on
a site is... - ANSWER ... geology.
2. The commonly used hollow-stem auger system for monitoring well
installations... - ANSWER ... should include an auger head than can be
machined to accent a plate that facilitates well installation below the ground
water level.
3. The drilling method used to construct a monitoring well should... -
ANSWER ... minimize disturbance of subsurface materials
4. The "auger fork" is a device that slips through the flights of the auger
column and... - ANSWER ... keeps the augers from "sliding" back into the
borehole when removing the augers from the borehole.
5. For drilling operations at a hazardous waste site, the exclusion zone is... -
ANSWER ... the area on-site that is potentially contaminated and where
workers must wear PPE as stipulated in the site specific health and safety
plan.
6. An advantage of using hollow-stem augers is... - ANSWER ... no drilling
fluid is used, eliminating contamination by drilling fluid additives.
,7. A disadvantage of using cable tool drilling for monitoring wells is... -
ANSWER ... possible problems in controlling heaving sands.
8. Air in the discharge line of a recovery well system could be caused by... -
ANSWER Hole in drop pipe
Cascading water
Plugged screen and cavitation
9. Contamination from the cement grout leaking into the filter pack may be
indicated by... - ANSWER ... high pH.
10.Prior to leaving a hazardous waste site, decontamination is done in order to...
- ANSWER ... make sure no contamination leaves the site.
11.What is the method for removing sand that has entered the hollow-stem
auger after you have drilled below the water table? - ANSWER Wash the
sand out with approved water.
12.When the drill cuttings exceed the volume of the borehole while hollow-
stem auger drilling, you have usually... - ANSWER ... encountered flowing
sand.
13.Hollow-stem augers are commonly used to install wells because... -
ANSWER ... soil sampling is easy and accurate in most cases.
14.Proper screen selection for a ground water monitoring well should include...
- ANSWER ... slot size matched to filter pack material.
, 15.Of the methods listed, which is the best method of obtaining soil samples
during the drilling of a monitoring well? - ANSWER Using a Shelby tube
and/or split spoon sampler.
16.Monitoring wells used to sample ground water should always be... -
ANSWER 1. Installed with great care to avoid contamination from the
drilling process
2. Installed to protect the well from surface pollution.
3. Protected with secure well protective covers.
17.In order to establish project expectations, the drilling contractor should... -
ANSWER 1. Request and review the statement of work.
2. Discuss project specifics with the project manager.
3. Outline the statement of work with the drill crew.
18.Observations made during performance of contract work at a drilling and
monitoring site, such as unusual soil odor or color (of samples)... -
ANSWER ... are essentially the property of the person paying for the
investigation and who has the responsibility to take action as necessary to
protect the public.
19.Federal Motor Carrier safety regulations require the driver of a CMV of
10,001 lbs. combined weight or over to have... - ANSWER ... a medical
card and valid driver's license.
20.Personal protection requirements for working at a hazardous waste site are
broken down in four levels A thru D with... - ANSWER ... level A being the
most protective.
