Sampling

Question 1

A sample is defined as:

a) Representative of the whole
b) An insignificant portion of the tested water
c) A large quantity of wastewater
d) A test portion of wastewater

Answer 1

a) Representative of the whole

Question 2

Sample measurements are either:

a) Repetitive or sequential
b) Random or qualitative
c) Quantitative or qualitative
d) Regular or repetitive

Answer 2

c) Quantitative or qualitative

Question 3

Three methods of sampling are:

a) Random, dedicated, snap
b) Snap, hand, gross integrated
c) Grab, composite, sequential
d) Scoop, dip, random sequential

Answer 3

c) Grab, composite, sequential

Question 4

Sample containers for organic, metal, and bacteriological analysis must:

a) Be rinsed with a sample of the substance to be sampled
b) Not be rinsed
c) Not be labelled
d) Be used throughout the plant

Answer 4

b) Not be rinsed

Question 5

Two locations for sampling are:

a) Effluent and sludge
b) Beginning and end of the pump cycle
c) Influent and effluent of processes
d) Near the end of the supernatant withdrawal and end of pump cycle

Answer 5

c) Influent and effluent of processes