CWEA GRADE 1 LAB ANALYST PRACTICE TEST 4
QUESTIONS WITH CORRECT ANSWERS
1) Which of the following best describes the interpretation for total coliform and E coli
for the enzyme-substrate test? -- Answer โโ The presence of fluorescence is a
positive test for E. coli. If the chromogen intensifies, the sample is total-coliform
positive.
2) What is a Grab sample? -- Answer โโ Single samples collected at a specific spot at a
site over a short period of time (not to exceed 15 min)
3) A sample is in a person's custody if it is: -- Answer โโ In the individual's physical
possession, sight, secured and tampered proof by that individual, or secured in an
area restricted to authorized personnel
4) What should sample labels include? -- Answer โโ Unique sample number, sample
type, name of the collector, date and time of collection, place of collection, and
sample preservative
5) Sample seals should include -- Answer โโ Sample number that is identical to sample
label, collector's name, date and time of sampling. Attach so it must be broken to
open sample container.
