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CERT D - WTP - LABORATORY ANALYSIS - AWWA BOOK QUESTIONS AND ANSWERS FULLY SOLVED
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CERT D - WTP - LABORATORYANALYSIS - AWWA BOOK
What test is done by a lab to determine data quality?
a- performance evaluation
b- spiked samples to test
c- quality control
d- both b and c - answer spiked samples to test
A beaker is primarily used for
a- mixing chemicals
b- titrations
c- accurately measuring liquid chemicals
d- reaction vessel and jar testing - answer mixing chemicals
the Curie unit is the activity of 1g of ______________ or ______________
disintegrations per second - answerradium 3.7x 10^10
What is the primary constituent of the pH-causing ions in a water sample if the pH is
above 10? - answerOH^-1
Coliform bacteria will produce gas in ___________ broth at ____________ within
_______________
a- lactose or brilliant bile tryptose, 35 degrees Celsius, 24-48 hours
b- lactose or brilliant bile tryptose, 35 degrees Celsius, 48-72
c- lactose or lauryl tryptose, 35.5 degrees Celsius, 24-48 hours
d-lactose or lauryl tryptose, 35.5 degrees Celsius, 18-24 hours - answerlactose or lauryl
tryptose, 35.5 degrees Celsius, 24-48 hours
the # of samples under the total coliform rule that a water system must collect depends
on the ___________________
a- number of connections
b- number of customers it serves
c- amount of water produced
d- size of distribution - answerthe number of customers it serves
Phenolphthaelin acidity is the same as
, a- CO2
b- OH^-
c- HCO^3
d- CO^3 - answerCO2
drinking water samples to be tested for total coliforms should be tested the same day
they are collected, but they can be refrigerated for ______ hours before analysis -
answer8 hours
what type of lab equipment is highly resistant to heat, sudden temp changes, and
chemical attack?
a- pyrex
b- kimax
c-porcelain dishes
d- beakers - answerporcelain dishes
two metals that are typically toxic are ______________ and _______________, and
two metals that are not normally toxic are __________________ and
__________________.
a- chromium and cadmium AND manganese and iron
b- cadmium and manganese AND chromium and iron
c- cadmium and iron AND chromium and manganese
d- chromium and manganese AND cadmium and iron - answerchromium and cadmium
AND manganese and iron
the total hardness and the total alkalinity of water are used to calculate the
_______________ - answercarbonate and noncarbonate hardness
what group of organisms are measured that, if present, might indicate a presence of
pathogens?
a- cryptosporidium oocysts
b- coliform bacteria
c- bacilli bacteria
d- lactobacillus bacteria - answercoliform bacteria
alkalinity is defined as __________________
a- the quantity of CaCO3 and noncarbonate hardness that is in the water
b- the quantity of CaCO3 and MgCO3 that is in the water
c- a measurement of the waters capacity to neutralize an acid
d- the measurement of the waters capacity to neutralize an acid to a pH of 4.8 -
answerthe measurement of waters capacity to neutralize an acid
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