Hydraulics and Fluid Machines - Hydraulics and Fluid Machines objective type questions and answers


36. Which of the following is dimensionless.......


   A.Specific weight

   B.Specific volume

   C.Specific speed

   D.Specific gravity


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D.Specific gravity

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37. The normal stress in a fluid will be constant in all directions at a point only if .......


   A.It is compressible

   B.It has uniform viscosity

   C.It has zero viscosity

   D.It is frictionless

   E.It is at rest


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E.it is at rest

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38. Surface tension has the units of .........


   A.Newton/metre2

   B.New tons/m

   C.Newtons

   D.Newton m


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B.New tons/m

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39. Surface tension ......


   A.Acts in the plane of the interface normal to any line in the surface

   B.Is also known as capillarity

   C.Is a function of the curvature of the interface

   D.Decreases with fall in temperature


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A.Acts in the plane of the interface normal to any line in the surface

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40. Viscosity of water in comparison to mercury is .......


   A.Higher

   B.Lower

   C.Same

   D.Higher/lower depending on temperature


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A.Higher

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