CEA Environmental Assessment & Sampling Techniques

Question 1

What is the primary purpose of environmental sampling?

Accepted Answer

To collect representative samples for analysis

Answer

To increase pollution.

Answer

To dispose of hazardous waste.

Answer

To avoid environmental regulations.

Question 2

Which sampling technique reduces bias by giving each part of a population an equal chance of selection?

Accepted Answer

Random sampling

Answer

Convenience sampling.

Answer

Judgmental sampling.

Answer

Systematic sampling.

Question 3

What is a composite sample?

Accepted Answer

A mixture of multiple samples

Answer

A sample taken only from one spot.

Answer

A sample collected with no method.

Answer

A sample collected without labeling.

Question 4

Why is chain of custody documentation important in sampling?

Accepted Answer

To prevent sample contamination

Answer

To speed up sample disposal.

Answer

To label samples improperly.

Answer

To avoid reporting sample results.

Question 5

Which instrument is commonly used to measure particulate matter in air sampling?

Accepted Answer

Particulate matter sampler

Answer

Gas chromatograph.

Answer

Thermometer.

Answer

pH meter.

Question 6

What does the term 'detection limit' refer to in sampling?

Accepted Answer

Lowest concentration detectable

Answer

Highest pollutant level recorded.

Answer

Average pollutant concentration.

Answer

Amount of sample collected.

Question 7

Which sampling method involves collecting continuous samples over time?

Accepted Answer

Continuous sampling

Answer

Grab sampling.

Answer

Composite sampling.

Answer

Random sampling.

Question 8

Why is proper sample preservation important?

Accepted Answer

To keep samples stable and uncontaminated

Answer

To alter sample composition.

Answer

To speed up sample testing.

Answer

To increase sample volume.

Question 9

What is the purpose of quality assurance and quality control (QA/QC) in sampling?

Accepted Answer

To maintain high data quality

Answer

To reduce costs.

Answer

To speed up sampling.

Answer

To avoid reporting errors.