Engineering Thermodynamics
A heat exchange process in which the product of pressure and volume remains constant is known as

Hyperbolic process
Throttling process
Heat exchange process
Isentropic process

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Engineering Thermodynamics
Carbonization of coal consists of

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

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