waste water Flashcards
Which of the following well types if the most protected from surface contamination? A. artesian water B. infiltration gallery C. rock well D. shallow well
A. Artesian well
One major factor that leads to reservoir turnover is:
A. the lower strata being warmer than the upper strata
B. the upper strata becoming more dense and sinking to the bottom
C. the upper and lower strata reaching the same temperature
D. decaying organic matter causing a gaseous movement
B.
Which of the following elements cause hardness in water? A. sodium and potassium B. nitrogen and sulfur C. fluoride and oxygen D. calcium and magnesium
D (also known as CaCO3)
The primary health risk associated with volatile organic chemical (VOC'S) is: A. Cancer B. acute respiratory disease C. "blue baby" syndrome D. reduced I.Q. in children
A
The term “primacy” means the
A. authority by the states to supersede USEPA drinking water regulations
B. authority by the USEPA to supersede state drinking water regulations
C. requirement for states to maintain drinking water regulations more stringent than the USEPA regulations
D. primary authority for implementation and enforcement of drinking water regulations=
D
Lead in drinking water can result in A. impaired mental functioning in children B. Prostate cancer in men C. stomach and intestinal disorders D. reduced white blood cell count
A
pH is a measure of A. conductivity B. waters ability to neutralize acid C. hydrogen ion activity D. dissolved solids
C
The problem caused by dissolved carbon dioxide in the water is A. increased trihalomethanes (THMS) B. corrosion C. excessive encrustation in pipes D. tastes and odors
B
a major health risk associated with nitrites and nitrates is A. cancer B. acute respiratory disease C. "blue baby" syndrome D. reduced I.Q. in children
C
A primary source of volatile organic chemical (VOC) contamination of water supplies is A. agricultural pesticides B. industrial solvents C. acid rain D. agricultural fertilizers
B
The term “surface runoff” refers to
A. rainwater that soaks into the ground
B. rain that returns to the atmosphere from the earths surface
C. surface water that overflows the banks of rivers
D. water that flows into rivers after a rainfall
D
The term “maximum containment level goal (MCLG)” means the:
level of a contaminant in drinking water below which there are no known or suspected adverse health effects with a margin of safety
Which of the following elements does ion exchange softening increase in the finished water? A. calcium B. magnesium C. manganese D. sodium
D
Which water supply tends to have the most stable water turbidity, but is much more subject to algae growth?
Lakes
The drawdown in a well is measured from
the static water level to the pumping water level
The water table is defined as the
upper surface of the groundwater
Which of the following best defines the term specific capacity?
A. amount of water a given volume of saturated rock or sediment will yield to gravity
B. amount of water a given volume of saturated rock or sediment will yield to pumping
C. rate at which water would flow in an aquifer if the aquifer were an open conduit
D. amount of water a well will produce for each foot of a drawdown
D
The most common type of well used for public water supply systems is a A. jetted well B. driven well C. drilled well D. bored well
C
When a permit is required to enter a confined space, who may sign the permit?
The supervisor
Why should you contact other area companies with underground utilities before starting an underground repair job?
To ask the companies to mark the location of their utilities in the area of the repair job
Is it essential to ventilate a valve vault before entry in order to:
remove dangerous gasses
Flammable liquids require what type of fire extinguisher?
Class B
Turning off the power to a piece of equipment and blocking it so it cannot be turned back of is known as:
Lockout/Tagout
Bar screens are used to A. remove turbidity B. remove debris C. cover pipes D. size sand
B
