NGWA - Study Questions - Augering & Monitoring
Well questions with verified answers
A "travel blank" is a special sample vial that... Ans✓✓✓ ... contains
ASTM Type II reagent water and is shipped to the laboratory with
ground water samples that are to be tested for VOCs.
A disadvantage of using cable tool drilling for monitoring wells is...
Ans✓✓✓ ... possible problems in controlling heaving sands.
A flush mount well cover should have... Ans✓✓✓ ... concrete in the
base.
A piezometer is... Ans✓✓✓ ... an instrument placed in the ground
water used to measure pressure (head).
A poorly developed monitoring well can lead to which of the following?
Ans✓✓✓ 1. Low production rate.
2. High turbidity.
3. Non-representative ground water samples.
Air in the discharge line of a recovery well system could be caused by...
Ans✓✓✓ Hole in drop pipe
Cascading water
Plugged screen and cavitation
, An advantage of using hollow-stem augers is... Ans✓✓✓ ... no drilling
fluid is used, eliminating contamination by drilling fluid additives.
An auger head uses... Ans✓✓✓ ... tungsten faced forged steel teeth.
Contamination from the cement grout leaking into the filter pack may
be indicated by... Ans✓✓✓ ... high pH.
Daily inspection of drilling equipment should include, but is not limited
to... Ans✓✓✓ Inspection of cable, hoses, etc.
All fluid levels
First aid kit available
Different types of knock-out plugs are used when reaming holes. Which
type is not generally used? Ans✓✓✓ Flat low carbon steel.
Doubling the inside diameter of casing in a well will increase its cross
sectional area by... Ans✓✓✓ ... 4 times.
Due to the advanced technology, today's monitoring equipment and
material... Ans✓✓✓ ...
Well questions with verified answers
A "travel blank" is a special sample vial that... Ans✓✓✓ ... contains
ASTM Type II reagent water and is shipped to the laboratory with
ground water samples that are to be tested for VOCs.
A disadvantage of using cable tool drilling for monitoring wells is...
Ans✓✓✓ ... possible problems in controlling heaving sands.
A flush mount well cover should have... Ans✓✓✓ ... concrete in the
base.
A piezometer is... Ans✓✓✓ ... an instrument placed in the ground
water used to measure pressure (head).
A poorly developed monitoring well can lead to which of the following?
Ans✓✓✓ 1. Low production rate.
2. High turbidity.
3. Non-representative ground water samples.
Air in the discharge line of a recovery well system could be caused by...
Ans✓✓✓ Hole in drop pipe
Cascading water
Plugged screen and cavitation
, An advantage of using hollow-stem augers is... Ans✓✓✓ ... no drilling
fluid is used, eliminating contamination by drilling fluid additives.
An auger head uses... Ans✓✓✓ ... tungsten faced forged steel teeth.
Contamination from the cement grout leaking into the filter pack may
be indicated by... Ans✓✓✓ ... high pH.
Daily inspection of drilling equipment should include, but is not limited
to... Ans✓✓✓ Inspection of cable, hoses, etc.
All fluid levels
First aid kit available
Different types of knock-out plugs are used when reaming holes. Which
type is not generally used? Ans✓✓✓ Flat low carbon steel.
Doubling the inside diameter of casing in a well will increase its cross
sectional area by... Ans✓✓✓ ... 4 times.
Due to the advanced technology, today's monitoring equipment and
material... Ans✓✓✓ ...
