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Potable water may be defined as:
a. Any water that occasionally may be polluted from another source
b. Any water that, according to recognized standards, is safe for consumption
c. Water high in organic content
d. Water that has been transported from outside the service area - ANSWER: b). Any water
that according to recognized standard is safe for human consumption.
To prevent the entry of surface contamination into a well is the purpose of:
a. The well casing
b. The louvers or slots
c. Well development
d. The sanitary seal - ANSWER: d) The Sanitary Seal
Pure water will exhibit a pH value of?
,a. 0.0
b. 7.0
c. 10.5
d. 14.0 - ANSWER: b) 7.0
A pH reading of 6.0 units indicates that the water sample is:
a. Very acidic
b. Slightly alkaline
c. Very alkaline
d. Slightly acidic - ANSWER: d) Slightly Acidic
In drinking water quality, "TDS" is the abbreviation for?
a)Total digestable substances
b) Total dissolved solids
c) Time-delayed sicknesses
,d) Terminal diseases started - ANSWER: b) Total Dissolved Solids
In water quality, the symbol "mg/L" is equivalent to:
a. Micrograms per liter
b. Parts per million
c. Parts per billion
d. Mostly good levels - ANSWER: b) Parts per million
The term "clearwell" refers to a? - ANSWER: Reservoir at the outlet of a water treatment
plant.
A mechanical device often employed to prevent the over-filling and/ on over-draining of
distribution system reservoir is the? - ANSWER: Altitude Valve
In drinking water regulations, the abbreviation "MCL" stands for?
a) Maximum contaminant level
b) Multiple constituent levels
, c) Most common level
d) Minimum considered legal - ANSWER: a) Maximum contaminant level The
MBAS method is used to determine levels of which of the following drinking water
constituents? - ANSWER: Forming Agent
The primary cause of water quality deterioration in distribution system is? - ANSWER:
Water age
The term "Springline" applies to? - ANSWER: The midline of a pipeline
When possible, a water main should be tapped while still pressurized to? - ANSWER:
Minimize contamination risk
A connection made into a water main that is full of under pressure is called a?
a. Cross connection
b. Valve box