Thermodynamics - Mechanical Engineering Questions and Answers

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The polytropic index (n) is given by

\(\frac { log (\rho_1 \rho_2) } { log (v_1 v_2 )}\)

\(\frac { log (\rho_1/\rho_2) } { log (v_1/ v_2 )}\)

\(\frac { log (v_1/ v_2 )}{ log (\rho_1/\rho_2) } \)

\(log (\frac{\rho_1v_1}{\rho_2v_2})\)

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The amount of heat obtained by the complete combustion of 1 kg of a fuel when the products of its combustion are cooled down to the temperature of supplied air is called __________ calorific value offuel.

higher

lower

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The mass of flue gas per kg of fuel is the ratio of the

mass of oxygen in 1 kg of flue gas to the mass of oxygen in 1 kg of fuel

mass of oxygen in 1 kg of fuel to the mass of oxygen in 1 kg of flue gas

mass of carbon in 1 kg of flue gas to the mass of carbon in 1 kg of fuel

mass of carbon in 1 kg of fuel to the mass of carbon in 1 kg of flue gas

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Equal volumes of all gases, at the same temperature and pressure, contain equal number of molecules. This statement is called Avogadro's law.

True

False