Engineering Thermodynamics
Mond gas is obtained by

Passing steam over incandescent coke
Passing air and a large amount of steam over waste coal at about 650°C
Partial combustion of coal, coke, anthracite coal or charcoal in a mixed air steam blast
Carbonisation of bituminous coal

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Engineering Thermodynamics
Which of the following is the correct statement?

All the reversible engines have the same efficiency.
All the reversible and irreversible engines have the same efficiency.
All engines are designed as reversible in order to obtain maximum efficiency.
Irreversible engines have maximum efficiency.

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