Engineering Thermodynamics
Mond gas is obtained by

Carbonisation of bituminous coal
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
Passing steam over incandescent coke

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Engineering Thermodynamics
Which of the following is the correct statement of the second law of thermodynamics?

It is impossible to transfer heat from a body at a lower temperature to a higher temperature, without the aid of an external source
It is impossible to construct an engine working on a cyclic process, whose sole purpose is to convert heat energy into work
All of these
There is a definite amount of mechanical energy, which can be obtained from a given quantity of heat energy

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Engineering Thermodynamics
Stirling cycle consists of

Two constant volume and two isentropic processes
One constant volume, one constant pressure and two isentropic processes
Two constant volume and two isothermal processes
Two constant pressure and two isothermal processes

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