Answer the following questions as (T) for True or (F) for False. ___ In general,

Question

Answer the following questions as (T) for True or (F) for False. ___ In general, a turbulent flow will incur a lower frictional loss as compared to a laminar flow. ___ The drag is solely due to the friction surface between the flow stream and the of a body immersed in the fluid. ___ A flow with a small viscosity non-zero value may be treated as an in viscid flow if the velocity gradient is not very high. ___ If the friction factor is smaller, the pressure drop smaller, the pressure drop in a pipe is always smaller. ___ The mechanism of the lift generation may be explained using the Bernoulli equation. ___ Flow through a large body may be studied using a scaled down model provided that a similarity analysis is followed. ___ The roughness of a surface may affect the stability of a boundary layer. ___ The boundary layer separation is independent of the shape of the body. ___ For a fully developed flow in a horizontal circular pipe, the shear stress is proportional to the pressure gradient along the length of the pipe regardless of laminar or turbulent flow. ___ The use of dimensionless parameters may reduce the number of unknowns in analyzing a problem.

Explanation / Answer

1.False

2.True

3.True

4.False,because head loss depends on other factors too.

5.True

6.True

7.True

8.False

9.True

10.True

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