A. x”7
B. x,/2
C. x4/5
D. x3/5
where x is the distance from leading edge
Related Mcqs:
- The boundary layer thickness at a distance of l m from the leading edge of a flat plate, kept at zero angle of incidence to the flow direction, is O.l cm. The velocity outside the boundary layer is 25 ml sec. The boundary layer thickness at a distance of 4 m is__________________?
A. 0.40 cm
B. 0.20 cm
C. 0.10 cm
D. 0.05 cmAssume that boundary layer is entirely laminar
- If x is the distance from leading edge, then the boundary layer thickness in laminar flow varies as________________?
A. x
B. x
C. x
D. x/7 - The maximum thickness of boundary layer in a pipe of radius r is____________________?
A. 0
B. r/2
C. r
D. 2r - The distance y from pipe boundary, at which the point velocity is equal to average velocity for turbulent flow, is________________?
A. 0.223 R
B. 0.423 R
C. 0.577 R
D. 0.707 Rwhere R is radius of pipe
- For hydro-dynamically smooth boundary, the friction coefficient for turbulent flow is_______________?
A. constant
B. dependent only on Reynolds number
C. a function of Reynolds number and relative roughness
D. dependent on relative roughness only - The correct relationship among displacement thickness d, momentum thickness m and energy thickness e is_________________?
A. d > m > e
B. d > e > m
C. e > m > d
D. e > d > m - The distance from pipe boundary, at which the turbulent shear stress is one-third die wall shear stress, is_______________?
A. 1/3 R
B. 1/2 R
C. 2/3 R
D. 3/4Rwhere R is the radius of pipe
- The discharge through a V- notch varies as______________?
A. H1/2
B. H3’2
C. H5/2
D. H5’4 where H is head - The eddy viscosity for turbulent flow is______________?
A. a function of temperature only
B. a physical property of the fluid.
C. dependent on the flow
D. independent of the flow - With the same cross-sectional area and immersed in same turbulent flow, the largest total drag will be on__________________?
A. a circular disc of plate held normal to flow
B. a sphere
C. a cylinder
D. a streamlined body
