WT5 Water Treatment Grade 1 Study Questions with all
Correct & 100% Verified Answers |Actual Complete
Update |Already Graded A+
Which of the following are the ideal indicator for pathogens? ✔Correct Answer-Coliform
Bacteria
Acids, bases, and salts lacking carbon are? ✔Correct Answer-Inorganic compounds
The organisms used to indicate the likelihood that a pathogenic bacteria may be present are?
✔Correct Answer-Coliform bacteria
A physical property, as opposed to a chemical property, important to water treatment is
✔Correct Answer-turbidity
Which of the following are the two principal chemicals that cause water hardness ✔Correct
Answer-calcium and magnesium
Which of the following statements about viruses is not correct?
a.Viruses have no independent metabolism and depend on living cells for reproduction
b. Viruses range in diameter from 10 to 25 nanometers, which is smaller than can be seen with
an optical microscope
c. Viruses cannot survive in the environment for any length of time out-side of a humans or an
animals body.
d. Some types of viruses can cause acute epidemics of gastroenteritis ✔Correct Answer-C.
Viruses cannot survive in the environment for any length of time out-side of a humans or an
animals body.
Which of the following are commonly used as an indicator of drinking water quality?
✔Correct Answer-Coliform bacteria
What is the term for the smallest particle that retains the characteristics of the element that it
helps form? ✔Correct Answer-atom
What is a radical ✔Correct Answer-Group of elements that act like ions or single atoms
What measurements are used to express the weight of solute dissolved in a given volume of
solution ✔Correct Answer-mg/L and gpg (grains per gallon)
Convert 35.1 cfs to gpm
a.14,200
,b.15,800
c.17,600
d.18,300 ✔Correct Answer-
Convert 7.7 million gallons a day (mgd) into cubic feet per second (cfs)
a.11
b.12
c.15
d.19 ✔Correct Answer-
How many million gallons are there in 318 acre-ft?
a.104
b.107
c.110
d.116 ✔Correct Answer-
If 8.25 pounds of soda ash are mixed into 45 gallons of water, what is the percentage of soda
ash in the slurry?
a.2%
b.2.1%
c.2.2%
d.2.3% ✔Correct Answer-
Calculate the area of a circular reservoir in ft^2, with a diameter of 411 ft.
a.108,000
b.112,000
c.125,000
d.133,000 ✔Correct Answer-
Replacing the final digits of a number with zeros is referred to as ✔Correct Answer-rounding
In solving for an unknown value, you must
a.know the values for all but one of the terms of the equation to be used
b.move all positive numbers to left side
c.know the values for all terms
d.divide all unknown values by a known value ✔Correct Answer-a.know the values for all but
one of the terms of the equation to be used
What is the purpose of scientific notation ✔Correct Answer-Express any number as a term
multiplied by a power of 10
In performing treatment plant operations, what can you expect to happen if one of the
operating conditions changes? ✔Correct Answer-A proportionate change in other operating
conditions
, What is linear measurement? ✔Correct Answer-Defines the distance or length along a line
Provisions of which regulation are intended to protect drinking water consumers against the
unintended public health consequences associated with consumption of treated drinking water
containing residual disinfectants and disinfection by-products?
a. Filter backwash recycling rule
b.Ground Water Rule
c.Disinfectants and Disingection By-Products Rule
d.Surface Water Treatment Rule ✔Correct Answer-Disinfectants and Disinfectants by-product
rule
Under the Stage 1 DBPR the compliance value for TTHHM and HAA5 is determined by
calculating a ___ during the previous 12 moths for each DBP for all monitoring locations at each
plant.
a.running annual average
b.maximum containment level
c.locational annual average
d.CxT value ✔Correct Answer-Running Annual Average
Which of the following is not typically a section covered in a sanitary survey
a.water sources
b.storage facilities
c.fire department hydrants
d.water system management and operations ✔Correct Answer-c. Fire department hydrants
The maximum contaminant level for arsenic
a.is not specified in most states because its too difficult to control
b.is constantly changing
c.has increased in recent years
d.is higher than the technically feasible level ✔Correct Answer-b. Is constantly changing
List the MCL for the following: Nitrate, Nitrite, Fluoride, TTHM, HAA5, Arsenic ✔Correct
Answer-10 - 1 - 4.0 - 0.080 - 0.060 - 0.010
List and explain the treatment technic requirements for the following: Copper, Lead ✔Correct
Answer-Action level: 1.3 - 0.015
Explain the regulations for microbiological contaminants included in the total coliform rule and
its revisions ✔Correct Answer-MCL goal for E. Coli is zero. Total coliform positive samples
require three repeat samples tested for E. Coli. Positive repeat samples trigger violation notice
and further actions to eliminate contamination
Correct & 100% Verified Answers |Actual Complete
Update |Already Graded A+
Which of the following are the ideal indicator for pathogens? ✔Correct Answer-Coliform
Bacteria
Acids, bases, and salts lacking carbon are? ✔Correct Answer-Inorganic compounds
The organisms used to indicate the likelihood that a pathogenic bacteria may be present are?
✔Correct Answer-Coliform bacteria
A physical property, as opposed to a chemical property, important to water treatment is
✔Correct Answer-turbidity
Which of the following are the two principal chemicals that cause water hardness ✔Correct
Answer-calcium and magnesium
Which of the following statements about viruses is not correct?
a.Viruses have no independent metabolism and depend on living cells for reproduction
b. Viruses range in diameter from 10 to 25 nanometers, which is smaller than can be seen with
an optical microscope
c. Viruses cannot survive in the environment for any length of time out-side of a humans or an
animals body.
d. Some types of viruses can cause acute epidemics of gastroenteritis ✔Correct Answer-C.
Viruses cannot survive in the environment for any length of time out-side of a humans or an
animals body.
Which of the following are commonly used as an indicator of drinking water quality?
✔Correct Answer-Coliform bacteria
What is the term for the smallest particle that retains the characteristics of the element that it
helps form? ✔Correct Answer-atom
What is a radical ✔Correct Answer-Group of elements that act like ions or single atoms
What measurements are used to express the weight of solute dissolved in a given volume of
solution ✔Correct Answer-mg/L and gpg (grains per gallon)
Convert 35.1 cfs to gpm
a.14,200
,b.15,800
c.17,600
d.18,300 ✔Correct Answer-
Convert 7.7 million gallons a day (mgd) into cubic feet per second (cfs)
a.11
b.12
c.15
d.19 ✔Correct Answer-
How many million gallons are there in 318 acre-ft?
a.104
b.107
c.110
d.116 ✔Correct Answer-
If 8.25 pounds of soda ash are mixed into 45 gallons of water, what is the percentage of soda
ash in the slurry?
a.2%
b.2.1%
c.2.2%
d.2.3% ✔Correct Answer-
Calculate the area of a circular reservoir in ft^2, with a diameter of 411 ft.
a.108,000
b.112,000
c.125,000
d.133,000 ✔Correct Answer-
Replacing the final digits of a number with zeros is referred to as ✔Correct Answer-rounding
In solving for an unknown value, you must
a.know the values for all but one of the terms of the equation to be used
b.move all positive numbers to left side
c.know the values for all terms
d.divide all unknown values by a known value ✔Correct Answer-a.know the values for all but
one of the terms of the equation to be used
What is the purpose of scientific notation ✔Correct Answer-Express any number as a term
multiplied by a power of 10
In performing treatment plant operations, what can you expect to happen if one of the
operating conditions changes? ✔Correct Answer-A proportionate change in other operating
conditions
, What is linear measurement? ✔Correct Answer-Defines the distance or length along a line
Provisions of which regulation are intended to protect drinking water consumers against the
unintended public health consequences associated with consumption of treated drinking water
containing residual disinfectants and disinfection by-products?
a. Filter backwash recycling rule
b.Ground Water Rule
c.Disinfectants and Disingection By-Products Rule
d.Surface Water Treatment Rule ✔Correct Answer-Disinfectants and Disinfectants by-product
rule
Under the Stage 1 DBPR the compliance value for TTHHM and HAA5 is determined by
calculating a ___ during the previous 12 moths for each DBP for all monitoring locations at each
plant.
a.running annual average
b.maximum containment level
c.locational annual average
d.CxT value ✔Correct Answer-Running Annual Average
Which of the following is not typically a section covered in a sanitary survey
a.water sources
b.storage facilities
c.fire department hydrants
d.water system management and operations ✔Correct Answer-c. Fire department hydrants
The maximum contaminant level for arsenic
a.is not specified in most states because its too difficult to control
b.is constantly changing
c.has increased in recent years
d.is higher than the technically feasible level ✔Correct Answer-b. Is constantly changing
List the MCL for the following: Nitrate, Nitrite, Fluoride, TTHM, HAA5, Arsenic ✔Correct
Answer-10 - 1 - 4.0 - 0.080 - 0.060 - 0.010
List and explain the treatment technic requirements for the following: Copper, Lead ✔Correct
Answer-Action level: 1.3 - 0.015
Explain the regulations for microbiological contaminants included in the total coliform rule and
its revisions ✔Correct Answer-MCL goal for E. Coli is zero. Total coliform positive samples
require three repeat samples tested for E. Coli. Positive repeat samples trigger violation notice
and further actions to eliminate contamination
