Air Pollution and Control (APC) important questionsMost repeated in SPPU papers
These 42 questions appeared in more than one SPPU Air Pollution and Control paper we have: 11 papers, from Oct 2022 to Nov 2025. The most-asked come first. Each one links to the papers it was asked in.
Repeated questions
Endsem questions (40)
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Calculate the minimum size of the particle that will be removed with100% efficiency from a settling chamber for the following data: i) Horizontal velocity – 0.25 m/s ii) Particle Density - 2500 kg/m 3 iii) Chamber: Length -7.5 m, height -1.5 m iv) Viscosity of air -1.9 ×10 –5 kg/m s. (v) Gas Density –1.0888 kg/m 3 The settling chamber will be operated under quiescent conditions.
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Insem questions (2)
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Questions count as repeated when their wording matches closely across papers. Numericals that depend on a figure are left out, since the figure changes from paper to paper.