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Mechanical Engineering Objective Questions { Thermodynamics }



36. According to which law, all perfect gases change in volume by 1/273th of their original volume at 0C for every 1C change in temperature when pressure remains constant
A.Joule's law
B.Boyle's law
C.Charles law
D.Gay-Lussac law

37. According to Avogadro's Hypothesis
A.The molecular weights of all the perfect gases occupy the same volume under same conditions of pressure and temperature
B.The sum of partial pressure of mixture of two gases is sum of the two
C.Product of the gas constant and the molecular weight of an ideal gas is constant
D.Gases have two values of specific heat

38. Work done in a free expansion process is
A.+ve
B.-ve
C.Zero
D.Maximum

39. Extensive property of a system is one whose value
A.Depends on the mass of the system like volume
B.Does not depend on the mass of the system, like temperature, pressure, etc.
C.Is not dependent on the path followed but on the state
D.Is dependent on the path followed and not on the state

40. The statement that molecular weights of all gases occupy the same volume is known as
A.Avogadro's hypothesis
B.Dalton's law
C.Gas law
D.Law of thermodynamics

41. If a gas is heated against a pressure, keeping the volume constant, then work done will be equal to
A.+ ve
B.+ ve
C.Zero
D.Pressure x volume

42. To convert volumetric analysis to gravimetric analysis, the relative volume of each constituent of the flue gases is
A.Divided by its molecular weight
B.Multiplied by its molecular weight
C.Multiplied by its density
D.Multiplied by its specific weight

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