Compressors, Gas Turbines and Jet Engines
The thermal efficiency of a simple gas turbine for a given turbine inlet temperature with increase in pressure ratio

First increases and then decreases
Decreases
Increases
First decreases and then increases

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Compressors, Gas Turbines and Jet Engines
The assumption made in two stage compression with inter-cooler is that

All of the listed here
There is no pressure drop in the inter-cooler
The suction and delivery of air takes place at constant pressure
The compression in both the cylinders is polytropic

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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
Carbonisation of coal
Passing air and a large amount of steam over waste coal at about 65°C
Passing steam over incandescent coke

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

Partial combustion of coal, eke, 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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