Environmental Engineering Questions and Answers – Devices to Control Air Pollution

This set of Environmental Engineering Multiple Choice Questions & Answers (MCQs) focuses on “Devices to Control Air Pollution”.

1. Which of the following is used in ceramic industries?
a) Electrostatic precipitator
b) Dynamic precipitator
c) Spray tower
d) Wet cyclonic scrubber
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2. Wet scrubbers are classified into ____ types.
a) 2
b) 3
c) 5
d) 6
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3. The centrifugal collectors are classified into how many types?
a) 3
b) 4
c) 5
d) 2
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4. Which of the following air pollution control device has maximum efficiency?
a) Electrostatic precipitator
b) Dynamic precipitator
c) Spray tower
d) Wet cyclonic scrubber
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5. Which of the following fluid is used in web scrubbers?
a) Lime
b) MgSO₄
c) NaCl
d) K₂Cr₂O₇
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6. Which of the following is incorrect regarding the fabric filter?
a) They can remove very small particle
b) They are liable to chemical attack
c) They have low efficiency in comparison to venturi scrubber
d) They can handle large volume of gas at relatively high speed
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7. Which of the following removes both gaseous and particulate contaminants?
a) Venturi scrubber
b) Gravitational settling chamber
c) Dynamic precipitator
d) Wet scrubber
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8. Identify the correct statement regarding the Electrostatic precipitator.
a) Minimum particle size removal is <0.5μm
b) They can be operated at high temperature
c) It has a low maintenance cost
d) It does not cause any freezing problem
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Sanfoundry Global Education & Learning Series – Environmental Engineering.

To practice all areas of Environmental Engineering, here is complete set of 1000+ Multiple Choice Questions and Answers.

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