Compressors, Gas Turbines and Jet Engines
Which is false statement about multistage compression?

Power consumption per unit of air delivered is low
It is best suited for compression ratios around 7:1
Volumetric efficiency is high
The moisture in air is condensed in the inter-cooler

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

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

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