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Mechanical Engineering Objective Questions { Power Plant Engineering }



36. Heating wet steam at constant temperature , is heating it at constant
A.Volume
B.Pressure
C.Entropy
D.Enthalpy

37. Adiabatic process is
A.Essentially an isentropic process
B.Non-heat transfer process
C.Reversible process
D.Constant temperature process

38. The state of vapour under saturation condition is described by
A.Pressure alone
B.Temperature alone
C.Pressure and temperature
D.Pressure and dryness fraction

39. Pick up the wrong statement about critical condition of steam
A.Latent heat is zero
B.Liquid directly becomes steam
C.Specific volume of steam and liquid is same
D.This is the maximum pressure limit

40. Water boils when its vapour pressure
A.Equals that of the surroundings
B.Equals 760 mm of mercury
C.Equals to atmospheric pressure
D.Equals the pressure of water in the container

41. Mechanical equivalent of heat for 1 kcal or Joule's equivalent is equal to
A.427 kgm
B.421 kgm
C.539 kgm
D.102 kgm

42. Equivalent evaporation of water is the evaporatibn -for a feed water supply at 100C
A.And Its corresponding conversion into dry saturated steam at 100C and 1.033 kg/cm2
B.And its corresponding conversion into dry steam at desired boiler pressure
C.Conversion into steam at atmospheric condition
D.Conversion into steam at the same pressure at which feed water is supplied

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