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

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

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Compressors, Gas Turbines and Jet Engines
Which one of the following is the effect of blade shape on performance of a centrifugal compressor?

Forward curved blades produce lower pressure ratio
Forward curved blades has higher efficiency
Backward curved blades lead to stable performance
Backward curved blades has poor efficiency

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