Fluid Machines - Interview Questions | Exam2Win

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56. An ideal fluid is

A. one which obeys Newton's law of viscosity

B. frictionless and incompressible

C. very viscous

D. frictionless and compressible

Explanation:

57. The shear stress distribution for a fluid flowing in between the parallel plates, both at rest, is

A. constant over the cross section

B. parabolic distribution across the section

C. zero at the mid plane and varies linearly with distance from mid plane

D. zero at plates and increases linearly to midpoint

Explanation:

58. For hydro-dynamically smooth boundary, the friction coefficient for turbulent flow is

A. constant

B. dependent only on Reynolds number

C. a function of Reynolds number and relative roughness

D. dependent on relative roughness only

Explanation:

59. When an ideal fluid flows past a sphere,

A. highest intensity of pressure occurs around the circumference at right angles to flow

B. lowest pressure intensity occurs at front stagnation point

C. lowest pressure intensity occurs at rear stagnation point

D. total drag is zero

Explanation:

60. The boundary layer thickness in turbulent flow varies as

A. x"7

B. x,/2

C. x4/5

D. x3/5

Explanation: