ISRO Mechanical Engg.: Fluid Mechanics Quiz 4

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Question 1

The velocity distribution in a turbulent boundary layer is given by . What is the displacement thickness

• A
• B
• C
• D

Question 2

Flow takes place at Reynolds Number of 1500 in two different pipes with relative roughness of 0.001 and 0.002. The friction factor

• AWill be higher for the pipe with relative roughness of 0.001
• BWill be higher for the pipe having relative roughness of 0.002
• CWill be the same in both the pipes
• DIn the two pipes cannot be compared on the basis of data given

Question 3

The specific weight W of ocean water changes according to the equation . = Specific weight of ocean water at free surface and C is a constant. The pressure as a function of depth h is given by

• A
• B
• C
• D

Question 4

The 2-D flow with velocity

• ACompressible and irrotational
• BCompressible and not irrotational
• CIncompressible and irrotational
• DIncompressible and not irrotational

Question 5

An oil of kinematic viscosity of 0.5 stokes flow through a pipe of 20 cm diameter. What is the velocity if the flow is critical _________?

• A0.5 m/s
• B0.9 m/s
• C1.5 m/s
• D2 m/s

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