WATER QUALITY TECHNICIAN – AALSO
EXAM 2025 QUESTIONS 100% SOLVED
Salinity is commonly measured using which unit? - ANSWERppt
How would you prepare 100 mL of 0.0400 M KCl from 0.200 M KCl stock solution? -
ANSWERWithdraw 20.0 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.
Which of the following is not considered Laboratory Personal Protective Equipment
(PPE)? - ANSWERHair Tie
Which of the following is a concern after a chemical spill? - ANSWEREnvironmental
release
Adequate engineering controls or PPE to protect staff during cleanup
Slip or Trip Hazard
Where should flammable liquids be stored? - ANSWERIn an approved flammable liquid
storage cabinet
What is an alternative way to indirectly measure the amount of dissolved ozone in an
aquarium? - ANSWERDPD test for chlorine or bromine
Which of the following disinfection methods has a low potential for creating disinfection
byproducts? - ANSWERUV
Which of the following do not contribute to Conductivity/Salinity? - ANSWEROxygen
What wavelength is considered part of the Visible Spectrum? - ANSWER500 nm
What is the volume of water in this graduated cylinder? - ANSWER6.6 mL
When analyzing ammonia, a technician analyzed spiked a sample containing 0.05 ppm
ammonia as N with a standard, adding 0.10 ppm ammonia as N. When she reads the
value of her LFM on the spectrophotometer, she sees a result of 0.05 ppm. Her LFB
was spiked with 0.10 ppm ammonia as N and her result was 0.09 ppm ammonia as N.
What corrective action is appropriate - ANSWERRe-prepare LFM and if it still fails,
consider using a different method
If a water quality laboratory technician records data incorrectly, how should they
respond? - ANSWERDraw 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.
EXAM 2025 QUESTIONS 100% SOLVED
Salinity is commonly measured using which unit? - ANSWERppt
How would you prepare 100 mL of 0.0400 M KCl from 0.200 M KCl stock solution? -
ANSWERWithdraw 20.0 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.
Which of the following is not considered Laboratory Personal Protective Equipment
(PPE)? - ANSWERHair Tie
Which of the following is a concern after a chemical spill? - ANSWEREnvironmental
release
Adequate engineering controls or PPE to protect staff during cleanup
Slip or Trip Hazard
Where should flammable liquids be stored? - ANSWERIn an approved flammable liquid
storage cabinet
What is an alternative way to indirectly measure the amount of dissolved ozone in an
aquarium? - ANSWERDPD test for chlorine or bromine
Which of the following disinfection methods has a low potential for creating disinfection
byproducts? - ANSWERUV
Which of the following do not contribute to Conductivity/Salinity? - ANSWEROxygen
What wavelength is considered part of the Visible Spectrum? - ANSWER500 nm
What is the volume of water in this graduated cylinder? - ANSWER6.6 mL
When analyzing ammonia, a technician analyzed spiked a sample containing 0.05 ppm
ammonia as N with a standard, adding 0.10 ppm ammonia as N. When she reads the
value of her LFM on the spectrophotometer, she sees a result of 0.05 ppm. Her LFB
was spiked with 0.10 ppm ammonia as N and her result was 0.09 ppm ammonia as N.
What corrective action is appropriate - ANSWERRe-prepare LFM and if it still fails,
consider using a different method
If a water quality laboratory technician records data incorrectly, how should they
respond? - ANSWERDraw 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.
