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If you r talking about gases

Downward delivery:-collecting gases which are denser than air. e.g. carbon dioxide, chlorine.

upward delivery :-collecting gases which are less dense than air. e.g. hydrogen.

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15y ago

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Upward delivery refers to communication or information flowing from lower- to higher-level individuals within an organization. Downward delivery is the opposite, flowing from higher- to lower-level individuals. Both types are crucial for effective communication and decision-making within a hierarchical structure.

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10mo ago
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some gases are denser than (heavier) air e.g. CO2, HCl, H2S, Cl2. are delivered by downward delivery. while gases which are Less dense than (lighter) air e.g. H2,NH3 are delivered by upward delivery.

simultaneously the downward delivery of gas = upward displacement of air while upward delivery of gas = downward displacement of air.

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14y ago
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Q: What is the difference between upward and downward delivery?
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