Question Paper from: Railway RPF Sub Inspector

The open "Sigrees" or coal stoves often require fanning to sustain burning because of–


tendency of carbon dioxide to form a layer along with dust smoke


lack of oxygen in the surroundings of sigrees


accumulation of smoke and dust over the sigrees


interrupted release of moisture from the material

Chapter Name: Science

This has been asked in Question Paper

Railway RPF Sub Inspector


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= ?

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= ?

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de Vries proposed– 

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