waste water treatment - 11

15 flashcards · Other · by Vigarna Ramesh

1. Which term is to describe the adhesion of a thin layer of molecules to the surfaces of liquids or solids they come in contact with? A. Adsorption B. Neutralization C. Ion Exchange D. Disinfection

   Adsorption

2. The process of establishing continuous contact between an adhesive and the is known as ________ A. Substrate B. Wetting C. Base polymer D. Angstroms

   Wetting

3. Adsorption process is generally classified as _________ A. Physicsorption B. Chemisorption C. Both A and B D. None

   Both A and B

4. Langmuir Equation is expressed as _________ A. Ce/qe = 1/bXm+Ce/Xm B. Logqe = logk+ 1/n logCe C. qe = V(Co-Ce) /M D. None

   Ce/qe = 1/bXm+Ce/Xm

5. The most commonly used adsorbent and is particularly suited to the removal of apolar compounds A. Ion B. Active Carbon C. Polymer D. Acid

   Active Carbon

6. ________ have a very high internal surface area that permits adsorption. A. Adsorbents B. Aerobic process C. Filteration D. None of the above

   Adsorbents

7. Activated sludge usually employs an aeration period of _____________ A. 1 hour B. 24 hours C. 10-15 hours D. 4-8 hours

   4-8 hours

8. Which of the following is not an adsorbent? A. Carbon B. Polymers and resins C. Clay D. Dry sponge

   Dry sponge

9. Which type of isotherm is given from the figure, Choose from the following options? A. Type 1 Adsorption isotherm B. Type 2 Adsorption isotherm C. Type 3 Adsorption isotherm D. Type 4 Adsorption isotherm

   Type 1 Adsorption isotherm

10. Which of the following statement is false? A. The adsorption may be monolayered or multilayered B. Particle size of adsorbent will not affect the amount of adsorption C. Increase of pressure increases amount of adsorption D. Increase of temperature may decrease the amount of adsorption

    Particle size of adsorbent will not affect the amount of adsorption

11. _______ devices remove materials which would damage equipment or interfere with a process. A. Grit B. Screening C. Oxidation D. Reduction

    Screening

12. __________ is a process which involves further removal of the nitrogen. A. Nitrification B. Denitrification C. Ammonification D. Reduction

    Nitrification

13. What is the most common used coagulant? A. Alum B. Ferric Sulphate C. Limestone D. Coal

    Alum

14. Nitrification efficiency is significantly suppressed as the temperature is _________ A. Increased B. Decreased C. Neutral D. Maintained

    Decreased

15. Chemisorption A. Involves the weak attractive interactions between adsorbent and adsorbate B. Is irreversible in nature C. Decreases with increase of temperature D. Involves multilayer formation of adsorbent on adsorbant

    Is irreversible in nature