Q. Wet scrubbers are classified into ____ types.

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Q. The centrifugal collectors are classified into how many types?

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Q. Which of the following air pollution control device has maximum efficiency?

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Q. Which of the following fluid is used in web scrubbers?

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Q. Which of the following is incorrect regarding the fabric filter?

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Q. Which of the following removes both gaseous and particulate contaminants?

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Q. Identify the correct statement regarding the Electrostatic precipitator.

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Q. When environmental Lapse Rate (ELR) is less is than Adiabatic Lapse Rate (ALR), then which of the following occurs?

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Q. _______ occurs when atmospheric temperature increases with height.

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Q. When environmental Lapse Rate (ELR) is equal to the Adiabatic Lapse Rate (ALR), then which of the following occurs?

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Q. The wet adiabatic rate is greater than the dry adiabatic rate.

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Q. When Environmental Lapse Rate (ELR) is greater than Adiabatic Lapse Rate (ALR), then which of the following occurs?

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Q. Which of the following is the absorption unit?

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Q. Which of the following catalyst is used for removing hydrocarbon from gaseous pollutant in combustion unit?

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Q. Which of the following is not a part of adsorption unit?

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Q. Which of the following is a bulk phenomena?

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Q. Which of the following is not an adsorbent?

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Q. What is the principle behind which opacity monitors/transmissometers work?

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Q. Are any of the following monitors used to measure the concentration of particular gases from the exhaust generated in vehicles?

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Q. What does the abbreviation NDIR stand for, in the category of spectrometric analysers?

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