AWWA, ADEM Grade 4 Laboratory Analysis - Equipment and Maintenance The,100% Solved
What test is done by a lab to determine data quality?
spiked tests samples
A beaker is used primarily for
mixing chemicals
What is the primary constituent of the pH-causing ions in a water sample if ...
What test is done by a lab to determine data quality? - answer spiked tests samples
A beaker is used primarily for - answer mixing chemicals
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____ - answer lactose or
lauryl tryptase, 35.5 C, 24-48hrs
Number of samples under the Total coliform Rule that a water system must collect
depends on the - answer number of customers served
Phenolphthaelin acidity is the same as - answerCO2
How long can coliform samples be refrigerated before analysis - answer8 hours
Lab equipment resistant to heat, sudden temp change and chemical attack -
answerporcelain dishes
two metals that are typically toxic are - answerchromium and cadmium
two metals that are not normally toxic - answermanganese and iron
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 the presence of
pathogens - answercoliform bacteria
alkalinity is defined as - answermeasurement of the waters capacity to neutralize acid
what should be done with the lid while collecting a bacteriological sample - answerhold
cap, threads down while collecting the sample with the other hand
, the zeta potential is defined as a force the will keep ____ apart and keep them
suspended - answervery small colloidal particles
SUVA is an indicator of what disinfection by product precursor substances -
answerhumic content
sampling of organic compounds must be done with ultraclean glass vials that lids made
of - answerpolytetrafluorothylene
the best place to collect samples at water treatment plants would be - answerfrom main
stream flow
what are the chemical formula precipitates when chlorine is added to water containing
iron and manganese - answerFe(OH)3 and MnO2
The saturation point of a chemical in water varies with - answerPh, total dissolved solids
(TDS) and temp
why is it important to label all contents of all containers that carry materials or solutions -
answerprevent mixing incompatible materials, prevent unwanted reactions affecting
health and safety and prevent losing sample
the amount of oxygen that can remain dissolved in water is a function of the waters
____ and the ____the water, the____the possible concentration of dissolved oxygen -
answertemp, colder, higher
the precise location of sampling points depends on the ____distribution system -
answerconfiguration
which is the most inexpensive pathogenic test - answercoliforms
in order to test a lab and analyst, the oversight agency gives the lab and analyst a
_____ test - answerset of blinds to
a virus would be considered a - answercolloidal solid and biological solid
customer complaints of taste and odor are often caused by - answerwater softener or
water heater
what are the additives in detergent that tie up hardness ions - answersequestering
agents
what rule requires the measurement of conductivity - answerLead and Copper rule
any good____ household detergent is adequate for cleaning labware, and it is preferred
that the detergent is a____ - answernonphosphate, liquid
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