Engineering Thermodynamics
Carbonization of coal consists of

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
None of these
Drying and crushing the coal to a fine powder

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Engineering Thermodynamics
Which is the incorrect statement about Carnot cycle?

It is used as the alternate standard of comparison of all heat engines
It provides concept of maximising work output between the two temperature limits
All of these
All the heat engines are based on Carnot cycle

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