Posted inQuiz Quiz: Gaseous Pollutants Control Techniques Posted by kanwar August 4, 2024No Comments 36 Gaseous Pollutants Control Techniques 1 / 15 1. Which of the following is a major advantage of using a catalytic oxidizer over a direct flame oxidizer? A. Lower operating temperatures, leading to reduced energy consumption and NOx formation. B. Higher destruction efficiency for a wider range of pollutants. C. Ability to handle high concentrations of particulate matter. D. No need for additional fuel to sustain combustion. 2 / 15 2. Which type of thermal oxidizer offers the highest energy efficiency due to its heat recovery mechanism? A. Regenerative oxidizer B. Recuperative oxidizer C. Direct flame oxidizer D. Catalytic oxidizer 3 / 15 3. Which type of scrubber is MOST suitable for removing both particulate matter and acid gases from industrial exhaust streams? A. Thermal oxidizer B. Wet scrubber C. Dry scrubber D. Adsorber 4 / 15 4. In a dry scrubber system, the sorbent material typically reacts with the pollutant gas to form: A. A colloidal suspension. B. A solid precipitate. C. A gaseous byproduct. D. A liquid effluent. 5 / 15 5. The selection of the appropriate gaseous pollutant control device depends on various factors, including: A. The exhaust gas flow rate and temperature. B. The desired removal efficiency. C. All of the above. D. The type and concentration of pollutants. 6 / 15 6. Which adsorbent material is known for its high capacity for removing a wide range of volatile organic compounds (VOCs)? A. Limestone B. Zeolites C. Activated carbon D. Silica gel 7 / 15 7. A venturi scrubber achieves high collection efficiency for fine particulate matter primarily due to: A. Its low pressure drop. B. The use of a packed bed C. Its large cross-sectional area. D. High gas velocity and turbulence creating fine liquid droplets 8 / 15 8. In a thermal oxidizer, the “destruction efficiency” refers to: A. The efficiency of fuel combustion. B. The amount of heat recovered from the process. C. The percentage of pollutant removed from the exhaust gas. D. The ratio of pollutant inlet concentration to outlet concentration. 9 / 15 9. In a packed tower wet scrubber, the packing material serves primarily to: A. Increase the contact surface area between gas and liquid. B. Reduce the pressure drop across the scrubber. C. Enhance the chemical reaction rate. D. Increase the gas flow velocity. 10 / 15 10. In a catalytic oxidizer, the catalyst primarily functions to: A. Reduce the formation of NOx. B. Increase the combustion temperature. C. Lower the activation energy for oxidation reactions. D. Increase the residence time of pollutants in the system. 11 / 15 11. The “breakthrough point” in an adsorber refers to: A. The point at which the adsorbent is fully saturated and can no longer adsorb pollutants. B. The point at which the pollutant concentration in the outlet gas exceeds a predetermined limit. C. The point at which the temperature in the adsorber reaches its maximum limit. D. The point at which the adsorbent bed starts to regenerate. 12 / 15 12. Which of the following absorption mechanisms in a wet scrubber is MOST effective for removing highly soluble gases like ammonia (NH3)? A. Condensation B. Adsorption onto the liquid surface C. Chemical reaction with an acidic solution D. Physical absorption 13 / 15 13. Which of the following is a common challenge in the operation of wet scrubbers? A. High energy consumption B. Scaling and fouling due to dissolved solids in the scrubbing liquid C. Limited removal efficiency for particulate matter D. Difficulty in handling dry waste products 14 / 15 14. In a regenerative thermal oxidizer, the heat exchange media (ceramic beds) serve to: A. Pre-heat the incoming exhaust gas and recover heat from the outgoing clean gas. B. Increase the combustion temperature. C. Catalyze the oxidation reactions. D. Reduce the formation of NOx. 15 / 15 15. The adsorption process in an adsorber is influenced by several factors. Which of these is LEAST likely to impact adsorption efficiency? A. Pollutant concentration B. Temperature C. Humidity D. Adsorber vessel material The average score is 51% LinkedIn Facebook VKontakte 0% Restart quiz Send feedback Author kanwar Kanwar Bhan Godara UGC NET JRF Environmental Science View all posts kanwar Kanwar Bhan Godara UGC NET JRF Environmental Science View All Posts Post navigation Previous Post The Green Clean: Bioremediation for a Sustainable TomorrowNext Post17: Nature’s Secret Code for a Greener Future