Compressors, Gas Turbines and Jet Engines
In a jet propulsion

Its functioning does not depend upon presence of air
The propulsive matter is ejected from within the propelled body
The propulsive matter is caused to flow around the propelled body
None of these

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Compressors, Gas Turbines and Jet Engines
Water gas is produced by

Passing steam over incandescent coke
Partial combustion of coal, eke, anthracite coal or charcoal in a mixed air steam blast
Carbonisation of coal
Passing air and a large amount of steam over waste coal at about 65°C

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