Additional flashcards

The portion of precipitation that returns to the atmosphere without hitting the ground is called __________ _______ (eg. water evapoarting off plant leaves)

The upper boundary of an unconfined aquifer is the ______ ______.

Which type of aquifer is more vulnerable to suface contamination (eg. agriculture, oil spills): confined or unconfined?

Which type of aquifer has more stable water levels: confined or unconfined?

Which type of aquifer can create artesian wells due to being under pressure: confined or unconfined?

An aquifer that CANNOT quickly replace water that is pumped from it will have a ____ (high / low) drawdown.

Driven wells aka "sand point wells" are only allowed for which type of use: private residential or municipal?

A Community Water System (CWS) serves at least ___ residential service connections OR at least ____ residents year-round.

Other-Than-Municipal (OC) Community Water Systems are Community Water Systems that serve at least 25 year-round residents from _________ ______, eg. trailer parks, condos, long-term care facilities.

A well's efficiency can be measured by it's __________ __________ (gpm/ft), which is the rate of water discharge per unit drawdown.

Well operators would prefer to see a well's specific capacity ___________ (increase / decrease).

A well that pumps little water while having a high impact on aquifer water levels (eg. high drawdown) has a ______ (high / low) specific capcity.

A ______ (rise / drop) in static and pumping water levels of a well might be attributed to drought conditions or a well in need of rehab.

A well must be abandoned if it's contaminated with pathogens and ____ attempts to disinfect it fail.

A well must be abandoned if it's been out of service for _____ days or more.

A well must be abandoned if it's been "temporarily out of service" for ____ years or longer.

Positive displacement pumps can be rotary style or ____________ style.

Dug, bored, and driven wells are examples of ________ (private / municipal) wells.

Drilled, radial, and caisson wells are examples of __________ (private / municipal) wells.

Operating a pump outside of it's spec (higher or lower rate than design) can lead to well ___________, which is small bubble of water vapor in the well that makes a gravelly/clinking sound.

Which type of impeller is best for pumping water with no solids present: closed, open, semi-open, or split?

If you can't tighten the packing gland any further, you should _________ the packing.

Polyphosphates can help solve water quality problems resulting from _______ contaminants.

Water quality issues arising from iron, manganese, calcium like color, scale, corrosion, and chlorine demands can be addressed with the addition of ____________ which work by binding up metals to keep them soluble in water.

Why add sodium hydroxide?

Inject chlorine ( before / after ) check valve.

Inject polyphosphate after check valve but before...

Inject sodium hydroxide and hydrofluoric acid after the last...