thermodynamics questions and answers pdf
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All the mechanical engineering systems are studied with the help of thermodynamics. Second law: This law states that “all processes in nature tend to occur with an increase in entropy and the direction of change always lead to the increase in entropy.”, Third law: This law states that “The entropy of a perfect crystal of each element and a compound is zero at absolute zero.”.

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Octane No:-Octane number is defined as the percentage, by volume, of iso octane in the mixture of iso octane and h-heptane.

For example: A reaction taking place in a closed metallic vessel. 2) Why different types of sound are produced in different bikes, though they run on SI Engines? According to the laws of conservation of energy, “energy can neither be created nor be destroyed. Heat transfer deals with the energy analysis which in transition and and depends on the modes of heat transfer like conduction, convection and radiation or combination of any modes. %�쏢

The amount of unavailable work increases as the entropy increases. It does this work by reducing or increasing the amount of fuel passing to the engine. Improving the surface finish by Polishing & providing residual stress by Shot peening. 5) Definition of Octane Number and Cetane Number? 10) What happens if gasoline is used in a Diesel Engine, Siesel Engine will work? Thermodynamics Multiple Choice Questions Answers Thermodynamic Questions And Answers - Reliefwatch Thermodynamics Multiple Choice For pure substances, the heat effects accompanying changes in state at constant pressure (no temperature change being evident) are known as latent heats. Cetane No.- Cetane number is defined as the percentage, by volume, of n-cetane in the mixture of n-cetane and alpha methyl naphthalene. For an aqueous solution of salts, the specific heat can be estimated by assuming the specific heat of the solution equal to that of the water alone. This phenomenon is called the Poisson effect. w���_��X��_~��a�h�� ���F/��qc��Y��iuR��R��2w�5��I�ɝJSRIG��lQ`�f�0:��� 16) In which process internal energy remains constant ?

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