AWWA WATER LATEST
OPERATOR
CERTIFICATION EXAM
PREP
In the wellhead protection program, the most important technical step is
__________. - ANSWERS-determining the recharge area of a particular
aquifer
The specific ultraviolet absorbance (SUVA) is calculated using the
absorbance of UV light at 254 nm (multiplied or divided) by the
concentration of ______. - ANSWERS-Divided, dissolved organic
carbon
What type of oven would be used to burn solids? - ANSWERS-muffle
oven
What is the log removal for a water treatment plant if the samples show
a raw water coliform count of 150/100 mL and the finished water shows
1.2/100mL? - ANSWERS-2.1 logs
A water that is neither scale-forming nor corrosive is stable. This
condition is termed ____. - ANSWERS-saturation
END OF
PAGE
1
, AWWA WATER LATEST
OPERATOR
CERTIFICATION EXAM
PREP
What is the water chemist interested in with regard to pH? -
ANSWERS-what makes up the pH and how much buffering exists
To determine the carbon dioxide concentration in water using the
nomographic method, an operator also would have to know which of the
following (may be a combination or all): temperature, pH, TDS,
bicarbonate alkalinity - ANSWERS-all: temp, pH, TDS, bicarb alk
When iron corrodes, it is converted from _______ to ______. -
ANSWERS-Fe to Fe 2+
The readouts on electrical conductivity meters is in (microamps or
microhms), at _____ degree C. - ANSWERS-microhms, 25 degree C
Regarding the USEPA sampling frequency for radionuclides in drinking
water for individual contaminants at each entry point: If results of testing
are equal to or above the detection limit but equal to or less than 1/2 the
MCL, what is the frequency of sampling? - ANSWERS-6 years
END OF
PAGE
2
, AWWA WATER LATEST
OPERATOR
CERTIFICATION EXAM
PREP
A simple test to determine the possible presence of pathogens would be
testing for ________. - ANSWERS-coliforms
What is the HPC method, and how long are the samples incubated? -
ANSWERS-Diluted water samples are placed on a plate-count agar, 48-
72 hr
What indicates whether the small amount of fluid in the tip of a pipette
that remains after it has drained should be blown out? - ANSWERS-A
frosted band near the top of the pipette
The mass spectrophotometer has the ability to identify many organic
compounds by their ______. - ANSWERS-mass and fragmentation
pattern
What type of chlorine-measuring method uses a device that contains a
chlorine gas-permeable membrane? - ANSWERS-Polarographic method
END OF
PAGE
3
, AWWA WATER LATEST
OPERATOR
CERTIFICATION EXAM
PREP
Under current regulations, what type of samples must be collected from
the source water supply? - ANSWERS-Radiological contaminants
The Department of Health and Human Services and the USEPA have
recommended that the optimum level of fluoride in drinking water is -
ANSWERS-0.7 mg/L
How does cyanide affect the human body? - ANSWERS-Causes nerve
damage and respiratory problems.
What type of process control can be used if accuracy is not critical? -
ANSWERS-Feed forward control.
What measuring and transmitting level device works readily on a 4-20
mA system but needs a temperature correction? - ANSWERS-Sonic type
Groundwater systems at high risk for fecal contamination must provide
a_____inactivation of_____. - ANSWERS-4.0-log, viruses
END OF
PAGE
4
OPERATOR
CERTIFICATION EXAM
PREP
In the wellhead protection program, the most important technical step is
__________. - ANSWERS-determining the recharge area of a particular
aquifer
The specific ultraviolet absorbance (SUVA) is calculated using the
absorbance of UV light at 254 nm (multiplied or divided) by the
concentration of ______. - ANSWERS-Divided, dissolved organic
carbon
What type of oven would be used to burn solids? - ANSWERS-muffle
oven
What is the log removal for a water treatment plant if the samples show
a raw water coliform count of 150/100 mL and the finished water shows
1.2/100mL? - ANSWERS-2.1 logs
A water that is neither scale-forming nor corrosive is stable. This
condition is termed ____. - ANSWERS-saturation
END OF
PAGE
1
, AWWA WATER LATEST
OPERATOR
CERTIFICATION EXAM
PREP
What is the water chemist interested in with regard to pH? -
ANSWERS-what makes up the pH and how much buffering exists
To determine the carbon dioxide concentration in water using the
nomographic method, an operator also would have to know which of the
following (may be a combination or all): temperature, pH, TDS,
bicarbonate alkalinity - ANSWERS-all: temp, pH, TDS, bicarb alk
When iron corrodes, it is converted from _______ to ______. -
ANSWERS-Fe to Fe 2+
The readouts on electrical conductivity meters is in (microamps or
microhms), at _____ degree C. - ANSWERS-microhms, 25 degree C
Regarding the USEPA sampling frequency for radionuclides in drinking
water for individual contaminants at each entry point: If results of testing
are equal to or above the detection limit but equal to or less than 1/2 the
MCL, what is the frequency of sampling? - ANSWERS-6 years
END OF
PAGE
2
, AWWA WATER LATEST
OPERATOR
CERTIFICATION EXAM
PREP
A simple test to determine the possible presence of pathogens would be
testing for ________. - ANSWERS-coliforms
What is the HPC method, and how long are the samples incubated? -
ANSWERS-Diluted water samples are placed on a plate-count agar, 48-
72 hr
What indicates whether the small amount of fluid in the tip of a pipette
that remains after it has drained should be blown out? - ANSWERS-A
frosted band near the top of the pipette
The mass spectrophotometer has the ability to identify many organic
compounds by their ______. - ANSWERS-mass and fragmentation
pattern
What type of chlorine-measuring method uses a device that contains a
chlorine gas-permeable membrane? - ANSWERS-Polarographic method
END OF
PAGE
3
, AWWA WATER LATEST
OPERATOR
CERTIFICATION EXAM
PREP
Under current regulations, what type of samples must be collected from
the source water supply? - ANSWERS-Radiological contaminants
The Department of Health and Human Services and the USEPA have
recommended that the optimum level of fluoride in drinking water is -
ANSWERS-0.7 mg/L
How does cyanide affect the human body? - ANSWERS-Causes nerve
damage and respiratory problems.
What type of process control can be used if accuracy is not critical? -
ANSWERS-Feed forward control.
What measuring and transmitting level device works readily on a 4-20
mA system but needs a temperature correction? - ANSWERS-Sonic type
Groundwater systems at high risk for fecal contamination must provide
a_____inactivation of_____. - ANSWERS-4.0-log, viruses
END OF
PAGE
4
