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Mechanical Engineering Objective Questions { Fluid Mechanics }

43. The ratio of absolute viscosity to mass density is known as
A.Specific viscosity
B.Viscosity index
C.Kinematic viscosity
D.Coefficient of viscosity

44. Kinematic viscosity is equal to
A.Dynamic viscosity/density
B.Dynamicviscosity x density
C.Density/dynamic viscosity
D.Lidynamicviscosity x density

45. Which of the following is the unit of kinematic viscosity

46. A one dimensional flow is one which
A.Is uniform flow
B.Is steady uniform flow
C.Takes place in straight lines
D.Involves zero transverse component of flow

47. Alcohol is used in manometers because
A.It has low vapour pressure
B.It is clearly visible
C.It has low surface tension
D.It can provide longer column due to low density

48. A pressure of 25 m of head of water is equal to
A.25 Idslim2
B.245 kN/m2
C.2500 kN/m2

49. Specific weight of sea water is more that of pure water because it contains
A.Dissolved air
B.Dissolved salt
C.Suspended matter
D.All of the above

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