Question 1 a- The friction factor for laminar flow doesn’t depend on pipe roughn

Question

Question 1

a- The friction factor for laminar flow doesn’t depend on pipe roughness. .(True) (false)

b- The friction factor for laminar flow can be directly calculated, but experiments are needed to find the friction factor for turbulent flow. . (True) (false)

c- The head losses for an orifice meter and venture meter are about the same .(True) (false)

d- Head loss can be expressed in dimensions of length . (True) (false)

e Which of the following effects can be analyzed for a flow problem with dimensionless group:

1- inertia 2- surface tention 3- viscous effects 4- all answers

Explanation / Answer

A) FALSE. The Friction factor comes into play only in Turbulent flow not in Laminar flow.

B) FALSE.

C) FALSE. The Co-efficient of discharge is different for both.

D) TRUE Head loss can be expressed in dimensions of length

E) OPTION 4... We use inertia for all dimensionless numbers.. Viscous effect used for Reynolds Number. Similarly surface tention used for Weber Number

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