CLASS D WATER OPERATOR LICENSE EXAM TCEQ COMPLETE
EXAM STUDY GUIDE WITH PRACTICE QUESTION, Exams of
Nursing
What are some physical characteristics of water? - ANSWERTemperature,
turbidity, color, taste, odor
What are some chemical characteristics of water? - ANSWERHardness, pH,
solids, and gases
What is turbidity? - ANSWERthe amount of suspended matter, such as clay,
silt, organic matter, and microorganisms in water
T/F Water is never found pure in nature. - ANSWERTrue
Is turbidity more of a problem in groundwater or surface water? -
ANSWERSurface water
A system's filtered water must be _______ Nephelometric Turbidity Units
(NTU) or less in at least 95% of the measurements taken each month, and no
sample can exceed _____ NTU. - ANSWER0.3
1
T/F True color is dissolved in water (in solution) and cannot be removed by
filtering. - ANSWERTrue. Tea in water is an example of true color.
,Suspended color is called _______ color. - ANSWERapparent
Color above ______ units is objectionable in a public water supply. -
ANSWER15 units
A scale called the ________ measures odor. - ANSWERThreshold Odor
Number (TON)
Odor greater than a scale of _______ is undesirable. - ANSWER3
Taste and odors in water result from _______, bacteria, decaying organic
matter, gases, and chemicals such as manganese, zinc, copper, iron,
magnesium, sodium, and potassium. - ANSWERalgae
Chemical characteristics of water generally cannot be detected by sight,
smell, or taste and must be determined by __________. - ANSWERlaboratory
analysis
Chemical laboratory analysis must be sampled _______ per year for surface
water and normally _______ for groundwater. - ANSWERonce/year for
surface water
once every three years for groundwater
Water weighs ______ lbs/gal. - ANSWER8.34 lbs/gal
T/F
, For water, 1 mg/L is equal to 1 part per million (ppm) by weight. -
ANSWERTrue
Which two minerals mainly cause hardness in water? - ANSWERCalcium and
magnesium
Is hardness more of a problem in groundwater or surface water? -
ANSWERGroundwater
Water is considered hard when it exceeds _______. - ANSWER100 mg/L of
calcium carbonate
The pH scale ranges from _____ to _____. - ANSWER0 to 14
On the pH scale:
0 to <7 is ______.
7 is _______.
>7 to 14 is ______. - ANSWERAcidic
Neutral
Basic or alkaline
Sulfuric, hydrochloric, and nitric acids can be used to ______ pH.
Caustic, lime, or soda ash can be used to ______ pH. - ANSWERLower
Raise
Suspended solids can be removed by ________. - ANSWERFiltration
EXAM STUDY GUIDE WITH PRACTICE QUESTION, Exams of
Nursing
What are some physical characteristics of water? - ANSWERTemperature,
turbidity, color, taste, odor
What are some chemical characteristics of water? - ANSWERHardness, pH,
solids, and gases
What is turbidity? - ANSWERthe amount of suspended matter, such as clay,
silt, organic matter, and microorganisms in water
T/F Water is never found pure in nature. - ANSWERTrue
Is turbidity more of a problem in groundwater or surface water? -
ANSWERSurface water
A system's filtered water must be _______ Nephelometric Turbidity Units
(NTU) or less in at least 95% of the measurements taken each month, and no
sample can exceed _____ NTU. - ANSWER0.3
1
T/F True color is dissolved in water (in solution) and cannot be removed by
filtering. - ANSWERTrue. Tea in water is an example of true color.
,Suspended color is called _______ color. - ANSWERapparent
Color above ______ units is objectionable in a public water supply. -
ANSWER15 units
A scale called the ________ measures odor. - ANSWERThreshold Odor
Number (TON)
Odor greater than a scale of _______ is undesirable. - ANSWER3
Taste and odors in water result from _______, bacteria, decaying organic
matter, gases, and chemicals such as manganese, zinc, copper, iron,
magnesium, sodium, and potassium. - ANSWERalgae
Chemical characteristics of water generally cannot be detected by sight,
smell, or taste and must be determined by __________. - ANSWERlaboratory
analysis
Chemical laboratory analysis must be sampled _______ per year for surface
water and normally _______ for groundwater. - ANSWERonce/year for
surface water
once every three years for groundwater
Water weighs ______ lbs/gal. - ANSWER8.34 lbs/gal
T/F
, For water, 1 mg/L is equal to 1 part per million (ppm) by weight. -
ANSWERTrue
Which two minerals mainly cause hardness in water? - ANSWERCalcium and
magnesium
Is hardness more of a problem in groundwater or surface water? -
ANSWERGroundwater
Water is considered hard when it exceeds _______. - ANSWER100 mg/L of
calcium carbonate
The pH scale ranges from _____ to _____. - ANSWER0 to 14
On the pH scale:
0 to <7 is ______.
7 is _______.
>7 to 14 is ______. - ANSWERAcidic
Neutral
Basic or alkaline
Sulfuric, hydrochloric, and nitric acids can be used to ______ pH.
Caustic, lime, or soda ash can be used to ______ pH. - ANSWERLower
Raise
Suspended solids can be removed by ________. - ANSWERFiltration
