Engineering Thermodynamics
According to Avogadro's law, for a given pressure and temperature, each molecule of a gas

Occupies same volume
Occupies volume inversely proportional to its specific weight
Occupies volume proportional to its specific weight
Occupies volume inversely proportional to its molecular weight

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Engineering Thermodynamics
Stirling cycle consists of

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

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Engineering Thermodynamics
Carbonization of coal consists of

Drying and crushing the coal to a fine powder
None of these
Heating the wood with a limited supply of air to temperature not less than 280°C
Moulding the finely ground coal under pressure with or without a binding material

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Engineering Thermodynamics
The condition for the reversibility of a cycle is

The working parts of the engine must be friction free
All of these
The pressure and temperature of the working substance must not differ, appreciably, from those of the surroundings at any stage in the process
All the processes, taking place in the cycle of operation, must be extremely slow

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