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CWEA Lab Analyst Grade 1 TEST (questions and answers)complete_.pdf
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8/20/24, 5:53 PMCWEA Lab Analyst Grade 1
Jeremiah
Terms in this set (24)
Celcius (F-32)5/9
HPC media water bath 45`C, 3hr
Precision a measure of how close a series of measurements are to one another
Accuracy how close a measurement is to the true value
Electrical Fire unplug & sodium bicarbonate
analytical balance a device for determining mass that gives highly accurate measurements
top loading balance used to determine mass; not as precise as an analytical balance
triple beam balance instrument used to measure mass, less sensitive than top loading
Gram-negative rod-shaped bacteria normally present in the intestine; includes E. coli
Coliform
and other species.
temp and pH temp rises, pH drops. Must measure pH within 15 min of collecting sample
Always add ___ to ___ acid to water
spectrometer a device that spreads light into its different colors
rounding off .5=keep # even <.4 stays the same >.6 round up
Non-zero digits are always significant.
sig fig rules Any zeros between two significant digits are significant.
A final zero or trailing zeros in the decimal portion ONLY are significant.
adding sig figs smallest number of decimals
Alkalinity hold time 14 days
COD hold time 28 days
BOD hold time 48 hours
pH hold time 15 min
Turbidity hold time 48 hours
BOD Temp Incubator 20+/- 1`C
unique sample number, sample type, name of collector, date and time of collection,
Sample labels should include
place of collection, and sample preservative
mg/L to lb/day feed rate (lb/day)= dosage (mg/L) x flow rate (mgd) x 8.34
Normality equation (N1)(V1)=(N2)(V2)
1/1
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