Engineering Thermodynamics
The more effective way of increasing efficiency of Carnot engine is to

Decrease lower temperature
Decrease higher temperature
Increase higher temperature
Increase lower temperature

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Engineering Thermodynamics
According to Avogadro’s law

The sum of partial pressure of the mixture of two gases is sum of the two
All of these
Equal volumes of all gases, at the same temperature and pressure, contain equal number of molecules
The product of the gas constant and the molecular mass of an ideal gas is constant

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

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