2- Unit review exercises

Question 1

Developing your flight’s environmental sampling, analysis, and monitoring plan is based on
the
a. requirements provided by your major command (MAJCOM) bioenvironmental engineering
(BE).
b. criteria provided to you by civil engineering.
c. historical performance of your drinking water system.
d. regulatory requirements for your drinking water system.

Answer 1

d. regulatory requirements for your drinking water system.

Question 2

Include field blanks along with the liquid samples you send to the laboratory because they
a. check for cross-contamination while handling samples.
b. check for cross-contamination in storage and shipping.
c. confirm the accuracy of laboratory analysis.
d. verify proper sampling methods.

Answer 2

a. check for cross-contamination while handling samples.

Question 3

Your bioenvironmental engineering (BE) has informed you that you need to collect a water
sample that characterizes the water quality at the dining hall at 0900. Which type of sample do
you need to collect?
a. Bulk.
b. Grab.
c. Integrated.
d. Composite.

Answer 3

b. Grab.

Question 4

If you need to determine the residual chlorine content in a drinking water sampling, which
piece of equipment would you use?
a. Color comparator.
b. Litmus test paper.
c. Colilert color comparator.
d. Heterotrophic plate count.

Answer 4

a. Color comparator.

Question 5

What type of sampler is best suited to collecting a water sample at various levels from
tanks, tank cars and drums?
a. Bacon bomb.
b. Long pipette.
c. Handheld dipper.
d. Plastic polypropylene line glass jar attached to a rope.

Answer 5

a. Bacon bomb.

Question 6

Fluid transfer is best accomplished using a
a. plastic, polyethylene pasteur pipet.
b. Whirl-Pak® sample bag.
c. Cubitainer® sampler.
d. 40-milliliter (ml) glass vial.

Answer 6

a. plastic, polyethylene pasteur pipet.

Question 7

You have just received a new water test kit that you have never used before. What should
you do before using the kit the first time?
a. Find out if anyone in your flight is familiar with the equipment.
b. Run an operations check on the equipment.
c. Charge the battery for at least 6–8 hours.
d. Read manufacturer’s operating instructions.

Answer 7

d. Read manufacturer’s operating instructions.

Question 8

Which statement best describes how the calibration process works?
a. Compares equipment response against instruction manual guidelines.
b. Compares equipment response against an accurate reference source.
c. Compares readings against accurate reference readings.
d. Compares unknown values against know values.

Answer 8

b. Compares equipment response against an accurate reference source.

Question 9

When collecting drinking water samples, in what order should you collect them?
a. Chemicals, microbiological, metals.
b. Microbiological, metals, chemicals.
c. Metals, chemicals, microbiological.
d. Chemicals, metals, microbiological.

Answer 9

c. Metals, chemicals, microbiological.

Question 10

When sterilizing a water tap, what is the percentage of chlorine solution you should use and
how long should the tap be immersed in the solution?
a. 1 percent chlorine solution; 0.5 minutes.
b. 1 percent chlorine solution; 2 minutes.
c. 1 percent chlorine solution; 1 minute.
d. 1 percent chlorine solution; 3 minutes.

Answer 10

a. 1 percent chlorine solution; 0.5 minutes.

Question 11

When collecting potable water samples for bacteriological analysis, you should adhere to all
of the following guidelines except which one?
a. Never hold the bottle by the neck.
b. Always use good personal hygiene.
c. Never lay the bottle down on the ground.
d. Always flush out the bottle before taking the sample.

Answer 11

d. Always flush out the bottle before taking the sample.

Question 12

If you ship your bacteriological water samples to an approved laboratory, what is the
maximum time between collection and examination?
a. 12 hours.
b. 24 hours.
c. 36 hours.
d. 48 hours.

Answer 12

b. 24 hours.

Question 13

What is the first step you perform when taking a water sample for chlorine analysis?
a. Fill the sampling vial to the 5 mL mark.
b. Rinse the test tube with sample water.
c. Run the water for about 2 to 3 minutes.
d. Remove the faucet aerator.

Answer 13

d. Remove the faucet aerator.

Question 14

How is total combined chlorine (TCC) determined?
a. Subtracting the total residual chlorine (TRC) results from the free available chlorine (FAC)
results.
b. Subtracting the FAC results from the TRC results.
c. Multiply the FAC results by the TRC results.
d. Adding the TRC results to the FAC results.

Answer 14

b. Subtracting the FAC results from the TRC results.

Question 15

Drinking water with a high pH level (above 8.5) indicates to you the water
a. is soft.
b. is corrosive.
c. is a health risk.
d. can cause aesthetic problems.

Answer 15

d. can cause aesthetic problems.

Question 16

What type of water/liquid do you use to calibrate the pH pen?
a. Distilled.
b. Deionized.
c. Buffer solution.
d. Calibration fluid that comes with the pH pen.

Answer 16

c. Buffer solution.

Question 17

What test do you use to obtain qualitative information on whether or not your water sample
contains coliforms?
a. Absence/confirmation method.
b. Presence/deficiency method.
c. Absence/validation method.
d. Presence/absence method.

Answer 17

d. Presence/absence method.

Question 18

When should you take pH and chlorine measurements of the base swimming pool?
a. Before anyone enters the pool.
b. During minimum load conditions.
c. During the busiest time of the day.
d. When requested by the swimming pool facility manager.

Answer 18

c. During the busiest time of the day.

Question 19

When is the only time you collect bacteriological samples of a hot tub and spa?
a. Weekly during times of high usage.
b. When readings indicate there is no chlorine in the water.
c. If an illness occurs as a result of someone using the hot tub or spa.
d. Immediately after the hot tub/spa has been drained and cleaned.

Answer 19

c. If an illness occurs as a result of someone using the hot tub or spa.

Question 20

What action should you take first if the bacteriological quality of the swimming pool water
does not meet standards?
a. Immediately recommend the pool be superchlorinated.
b. Collect repeat samples from different sections of the pool.
c. Recommend to the medical group commander the pool be closed.
d. Collect repeat samples from the sections where you originally took samples.

Answer 20

d. Collect repeat samples from the sections where you originally took samples.

Question 21

Why are proper collection protocol and preservation guidelines important elements of a
quality assurance/quality control (QA/QC) program?
a. These ensure water quality data is accurate and useful.
b. These affect the reporting procedures required.
c. These eliminate the need for equipment calibration.
d. These eliminate the need for field quality control samples.

Answer 21

a. These ensure water quality data is accurate and useful.

Question 22

In the liquid sampling quality assurance/quality control (QA/QC) process, what is the
difference between trip blanks and equipment blanks?
a. Equipment blanks contain preservatives.
b. Trip blanks are provided by the laboratory.
c. Trip blanks only measure the temperature of the blank.
d. Equipment blanks are analyzed differently than other samples.

Answer 22

b. Trip blanks are provided by the laboratory.

Question 23

You should seal your liquid sample containers because it
a. ensures your samples will not leak during transport.
b. helps detect unauthorized tampering of your samples.
c. prevents unwanted contaminates from getting into the container.
d. prevents your sample containers from being damaged during shipment.

Answer 23

b. helps detect unauthorized tampering of your samples.

Question 23

It is important to use a chain of custody form because it helps ensure sample integrity from
a. collection to analysis.
b. analysis to data reporting.
c. collection to data reporting.
d. sampling shipment to analysis.

Answer 23

c. collection to data reporting.

Question 24

If any of your sampling equipment was contaminated it could cause
a. invalid sampling results.
b. skin contact hazard to the user.
c. damage to the sampling equipment.
d. no problem as long as the contamination was minimal.

Answer 24

a. invalid sampling results.

Question 25

Why do you need to use caution when using reagents to decontaminate sample equipment?
a. Reagents can damage the soil if not collected after use.
b. Reagents can leave residue on the sampling equipment.
c. Reagents must be stored separate from any non-compatible materials.
d. Reagents can cause inhalation hazards if not used in a well-ventilated area.

Answer 25

b. Reagents can leave residue on the sampling equipment.

Question 26

Water sample result interpretation is conducted by
a. conducting a thorough quality assurance/quality control (QA/QC) process.
b. comparing results to a selected standard.
c. comparing current results to previous survey(s).
d. using your chain of command for their decision.

Answer 26

b. comparing results to a selected standard.

Question 27

46. (419) Which is not a consideration when conducting water sample result interpretation?
    a. Correct type of standard.
    b. Correct units of measurement.
    c. Correct personnel assigned to task.
    d. Correct laboratory analysis method.

Answer 27

c. Correct personnel assigned to task.

Question 28

47. (419) Sampling results must be properly documented according to
    a. the applicable Air Force Office of Safety and Health (AFOSH) Standard.
    b. the Occupational Safety and Health Act (OSHA) criteria.
    c. the latest data management system.
    d. flight’s locally developed criteria.

Answer 28

c. the latest data management system.