Civil Engineering MCQs

Page No. 186

The losses are more in_________________?


alaminar flow


b transition flow


cturbulent flow


dcritical flow


View Answer turbulent flow

The maximum thickness of boundary layer in a pipe of radius r is____________________?


a 0


br/2


c r


d2r


View Answer r

Two pipe systems are said to be equivalent when_________________?


ahead loss and discharge are same in two systems


blength of pipe and discharge are same in two systems


c friction factor and length are same in two systems


dlength and diameter are same in two systems



The speed of a pressure wave through a pipe depends upon________________?


athe length of pipe


bthe viscosity of fluid


c the bulk modulus for the fluid


d the original head



Drag force is a function of________________?


aprojected area of the body


bmass density of the fluid


cvelocity of the body


dAll of the above


View Answer All of the above

For laminar flow in circular pipes, the Darcy’s friction factor f is equal to_________________?


a16/Re


b32/ Re


c 64/ Re


dnone of the above where R,, is Reynolds number


View Answer 64/ Re

The horse power transmitted through a pipe is maximum when the ratio of loss of head due to friction and total head supplied is________________?


a1/3


b1/4


c1/2


d2/3


View Answer 1/3

If the elevation of hydraulic grade line at the junction of three pipes is above the elevation of reservoirs B and C and below reservoir A, then the direction of flow will be___________________?


afrom reservoir A to reservoirs B and C


b from reservoir B to reservoirs C and A


c from reservoir C to reservoirs A and B


dunpredictable



Surge wave in a rectangular channel is an example of_________________?


asteady flow


bunsteady flow


cA and C


dnon-uniform flow


View Answer A and C

The correct relationship among displacement thickness d, momentum thickness m and energy thickness e is_________________?


ad > m > e


bd > e > m


ce > m > d


d e > d > m


View Answer e > d > m

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