5 Sample Questions

Air stripping and aeration are two water treatment unit processes that utilizes what principle to accomplish their specific water treatment objectives?

A. Mass Transfer
B. Chlorination
C. Coagulation
D. Filtration

Which of the following is one of the most common desorption processes used in water treatment?

A. Random Packing
B. Aeration
C. Air Stripping
D. Disinfection

Which of the following is typically used to add gases (e.g., O2, CO2, O3) into water?

A. Aspirator Contactors
B. Diffusion Contactors
C. Flooded Contactors
D. Thin-Film Contactors

There are two typical types of air–water contactors used for air stripping, the first type is: aerators. What is the second type of air-water contactor used for air stripping?

A. Sedimentation Basin
B. Towers
C. Clear Well
D. Filter

If water in deep wells is brought to the ground surface, dissolved gases such as methane or carbon dioxide will be released to the air because their concentrations in groundwater typically exceed equilibrium conditions with what?

A. Chlorine
B. Nitrogen
C. Benzene
D. Air

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