Civil Engineering Questions And Answers :: Fluid Machines: part3



Civil Engineering : Fluid Machines QUESTIONS AND ANSWERS :: part3 : 16 to 20

Following Civil Engineering Multiple choice objective type questions and answers will help you in BSNL JTO, GATE 2024 and IES 2024 examinations :

16.For laminar flow in a pipe of circular cross-section, the Darcy's friction factor f is

directly proportional to Reynolds number and independent of pipe wall roughness
directly proportional to pipe wall roughness and independent of Reynolds number
inversely proportional to Reynolds number and indpendent of pipe wall roughness
inversely proportional to Reynolds number and directly proportional to pipe wall roughness

17.In which of the following the friction drag is generally larger than pressure drag?

a circular disc or plate held normal to flow
a sphere
a cylinder
an airfoil

18.Stanton diagram is a

log-log plot of friction factor against Reynolds number
log-log plot of relative roughness against Reynolds number
semi-log plot of friction factor against Reynolds number
semi-log plot of friction factor against relative roughness

19.If a sphere of diameter 1 cm falls in castor oil of kinematic viscosity 10 stokes, with a terminal velocity of 1.5 cm/sec, the coefficient of drag on the sphere is

less than 1
between 1 and 100
160
200

20.Which of the following has highest coefficient of discharge ?

sharp edged orifice
venturimeter
Borda's mouthpiece running full
CipoUetti weir

More Fluid Machines QUESTIONS AND ANSWERS available in next pages

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