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Water Treatment Grade 1 Final Exam/204 Questions with solutions
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Water Treatment Grade 1 FinalExam/204 Questions with solutions
Convert 35.1 cfs to gpm.
A. 14,200 gpm
B. 15,800 gpm
C. 17,600 gpm
D. 18,300 gpm - -B
-Convert 7.7 million gallons per day (mgd) into cubic feet per second (cfs).
A. 11 cfs
B. 12 cfs
C. 15 cfs
D. 19 cfs - -B
-How many million gallons are there in 318 acre-feet?
A. 104 million gallons
B. 107 million gallons
C. 110 million gallons
D. 116 million gallons - -A
-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) 2.0%
B) 2.1%
C) 2.2%
D) 2.3% - -C
-Calculate the area of a circular reservoir in square feet, with a diameter of
411 feet.
A) 108,000
B) 112,000
C) 125,000
D) 133,000 - -D
-Replacing the final digits of a number with zeros, thus expressing the
number as tens, hundreds, thousands, etc., is referred to as
A) estimating
B) squaring
C) rounding
D) guesstimating - -C
-In solving for an unknown value, you must
A) know the values for all but one of the terms of the equation
,B) move all positive numbers to the left side of the equation
C) divide all unknown values by a known value - -A
-What is the purpose of scientific notation? - -Allows people to 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? - -A proportionate change will
occur in some other condition
-What is linear measurement? - -Defines the distance along a line; it is the
measurement between two points.
-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 disinfecion by-products?
A. Filter Backwash Recylcling rule
B. Ground Water Rule
C. Disinfectants and Disinfection By-products Rule
D. Surface Water Treatment Rule - -C. Disinfectants and Disinfection By-
products Rule
-Under Stage 1 DBPR, the compliance value for TTHM and HAA5 is
determined by calculating a _______ during the previous 12 months for each
DBP for all monitoring locations at each plant.
A. Running Annual Average
B. maximum contaminant level
C. locational annual average
D. CxT value - -A
-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 - -C
-The maximum contaminant level for arsenic
A. is not specified in most states
B. is constantly changing
C. has increased in recent years
D. is higher than the technically feasible level - -D
-List the MCL for the following: Nitrate, Nitrite, Fluoride, TTHM, HAA5, and
Arsenic. - -Nitrate: 10 mg/L
, Nitrite: 1 mg/L
Fluoride: 4 mg/L
TTHM: 0.080 mg/L
HAA5: 0.060 mg/L
Arsenic: 0.010 mg/L
-List and explain the treatment technique requirements for the following:
Copper and Lead. - -1.3 mg/L Cu, Pb0.015 mg/L. Action levels.
-Explain the regulations for microbiological contaminates included in the
total coliform rule and its revisions. - -MCL goal is 0 for E. coli. Total coliform
positive samples require 3 repeat samples. A positive repeat sample triggers
violation and further actions.
-Explain the CT disinfection requirements. - -Concentration of disinfectant
over time. Higher dose, lower amount of time. Smaller dose, greater amount
of exposure time.
-What is a sanitary survey? - -Assessment of water supply system and its
capability to produce safe water.
-How does the SDWA define a public water system? - -At least 15 service
lines that serves 25 or more people 60 or more days out of the year.
-Which of the following are the ideal indicator for pathogens?
A) Salmonella species
B) Coliform group bacteria
C) gram-negative cocci
D) Gram-negative coccobacilli - -B
-Acids, bases, and salts lacking carbon are:
A) ketones
B) aldehydes
C) organic compounds
D) inorganic compounds - -D
-The organisms used to indicate the likelihood that pathogenic bacteria may
be present are:
A) salmonella bacteria
B) enteric viruses
C) coliform bacteria
D) pseudomonas group bacteria - -C
-A physical property, as opposed to a chemical property, important to water
treatment is:
A) turbidity
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