AALSO water Quality Test Questions with Correct Answers Latest 2025
Salinity is commonly measured using which unit?
a. CFU
b. NTU
c. mEq/L
d. ppt - Answers d. ppt
How would you prepare 100 mL of 0.0400 M KCI from 0.200 M KCI stock solution?
a. Withdraw 10.0 mL of 0.200 M KCI, place it in a partially filled 100 mL volumetric flask and add water
until the final volume is 100 mL.
b. Withdraw 20.0 mL of 0.200 M KCI, place it in a partially filled 100 mL volumetric flask and add water
until the final volume is 100 mL.
c. Withdraw 40.0 mL of 0.200 M KC, place it in a partially filled 100 mL volumetric flask and add water
until the final volume is 100 mL.
d. Withdraw 50.0 mL of 0.200 M KCl, place it in a partially filled 100 mL volumetric flask and add water
until the final volume is 100 mL. - Answers b. Withdraw 20.0 mL of 0.200 M KCI, place it in a partially
filled 100 mL volumetric flask and add water until the final volume is 100 mL.
Which of the following is not considered Laboratory Personal Protective Equipment (PPE)?
a. Safety Glasses
b. Hair Tie
c. Face Shield
d. Lab Coat - Answers b. Hair Tie
Which of the following is a concern after a chemical spill?
a. Environmental release
b. Adequate engineering controls or PPE to protect staff during cleanup
c. Slip or Trip Hazard
d. All of the above - Answers d. All of the above
Where should flammable liquids be stored?
, a. In a fume hood
b. in a locked cabinet
c. In the bed of a pickup truck
d. in an approved flammable liquid storage cabinet - Answers d. in an approved flammable liquid storage
cabinet
If a water quality laboratory technician records data incorrectly, how should they respond?
a. Erase the misprint so it cannot be misinterpreted by husbandry staff
b. Draw a single line through the entry making sure that the inaccurate information is still legible. Initial
and date the entry. State the reason for the error. Document the correct information.
c. Re-record the worksheet so the data is easy to read
d. Do not make any alterations to the record - Answers b. Draw a single line through the entry making
sure that the inaccurate information is still legible. Initial and date the entry. State the reason for the
error. Document the correct information.
Why should you never add water to acid?
a. The exothermic reaction could possibly splash the content (acid) out of the container.
b. The endothermic reaction could freeze the container causing it to shatter.
c. it would neutralize the acid too much to render it useless.
d. Nothing would happen. There is no difference if you add water to acid or acid to water. - Answers a.
The exothermic reaction could possibly splash the content (acid) out of the container.
Which of the following is not a disinfection byproduct of chlorine disinfection?
a. Sodium hypochlorite
b. Trihalomethane compounds
c. Haloacetic acids
d. Chloroform - Answers a. Sodium hypochlorite
What is an alternative way to indirectly measure the amount of dissolved ozone in an aquarium?
a. DPD test for chlorine or bromine
b. Specific Conductance
Salinity is commonly measured using which unit?
a. CFU
b. NTU
c. mEq/L
d. ppt - Answers d. ppt
How would you prepare 100 mL of 0.0400 M KCI from 0.200 M KCI stock solution?
a. Withdraw 10.0 mL of 0.200 M KCI, place it in a partially filled 100 mL volumetric flask and add water
until the final volume is 100 mL.
b. Withdraw 20.0 mL of 0.200 M KCI, place it in a partially filled 100 mL volumetric flask and add water
until the final volume is 100 mL.
c. Withdraw 40.0 mL of 0.200 M KC, place it in a partially filled 100 mL volumetric flask and add water
until the final volume is 100 mL.
d. Withdraw 50.0 mL of 0.200 M KCl, place it in a partially filled 100 mL volumetric flask and add water
until the final volume is 100 mL. - Answers b. Withdraw 20.0 mL of 0.200 M KCI, place it in a partially
filled 100 mL volumetric flask and add water until the final volume is 100 mL.
Which of the following is not considered Laboratory Personal Protective Equipment (PPE)?
a. Safety Glasses
b. Hair Tie
c. Face Shield
d. Lab Coat - Answers b. Hair Tie
Which of the following is a concern after a chemical spill?
a. Environmental release
b. Adequate engineering controls or PPE to protect staff during cleanup
c. Slip or Trip Hazard
d. All of the above - Answers d. All of the above
Where should flammable liquids be stored?
, a. In a fume hood
b. in a locked cabinet
c. In the bed of a pickup truck
d. in an approved flammable liquid storage cabinet - Answers d. in an approved flammable liquid storage
cabinet
If a water quality laboratory technician records data incorrectly, how should they respond?
a. Erase the misprint so it cannot be misinterpreted by husbandry staff
b. Draw a single line through the entry making sure that the inaccurate information is still legible. Initial
and date the entry. State the reason for the error. Document the correct information.
c. Re-record the worksheet so the data is easy to read
d. Do not make any alterations to the record - Answers b. Draw a single line through the entry making
sure that the inaccurate information is still legible. Initial and date the entry. State the reason for the
error. Document the correct information.
Why should you never add water to acid?
a. The exothermic reaction could possibly splash the content (acid) out of the container.
b. The endothermic reaction could freeze the container causing it to shatter.
c. it would neutralize the acid too much to render it useless.
d. Nothing would happen. There is no difference if you add water to acid or acid to water. - Answers a.
The exothermic reaction could possibly splash the content (acid) out of the container.
Which of the following is not a disinfection byproduct of chlorine disinfection?
a. Sodium hypochlorite
b. Trihalomethane compounds
c. Haloacetic acids
d. Chloroform - Answers a. Sodium hypochlorite
What is an alternative way to indirectly measure the amount of dissolved ozone in an aquarium?
a. DPD test for chlorine or bromine
b. Specific Conductance
