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According to the Indian Standard Code IS: 3362-1977, in the case of natural ventilation, flow per unit area of the opening is greatest when the inlet and outlet openings are of nearly equal __________

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According to the Indian Standard Code IS: 3362-1977, in the case of natural ventilation, flow per unit area of the opening is greatest when the inlet and outlet openings are of nearly equal __________

(a) Lengths

(b) Volumes

(c) Areas

(d) Mass

The question was asked in an interview for internship.

My query is from Air Conditioning in section Acoustics and Ventilation of Construction & Building Materials

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The correct answer is (c) Areas

Explanation: According to the Indian Standard Code IS: 3362-1977, in the case of natural ventilation, flow per unit area of the opening is greatest when the inlet and outlet openings are of nearly equal areas. Also, inlet openings should be located on the windward side and outlet openings should be located on the leeward side.

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