Engineering Thermodynamics
A manufacturer claims to have a heat engine capable of developing 20 h.p. by receiving heat input of 400 kcal/mt and working between the temperature limits of 227° C and 27° C. His claim is

Theoretically possible
Cost will be very high
May be possible with lot of sophistications
Not possible

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Engineering Thermodynamics
Carbonization of coal consists of

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

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