A. d > m > e
B. d > e > m
C. e > m > d
D. e > d > m
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 the velocity is zero over half of the cross-sectional area and is uniform over the remaining half, then the momentum correction factor is_______________?
A. 1
B. 4/3
C. 2
D. 4 - When the velocity distribution is uniform over the cross-section, the correction factor for momentum is__________________?
A. 0
B. 1
C. 4/3
D. 2 - The boundary layer thickness in turbulent flow varies as______________?
A. x”7
B. x,/2
C. x4/5
D. x3/5where x is the distance from leading edge
- The maximum thickness of boundary layer in a pipe of radius r is____________________?
A. 0
B. r/2
C. r
D. 2r - 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 - In a two dimensional incompressible steady flow around an airfoil, the stream lines are 2 cm apart at a great distance from the airfoil, where the velocity is 30 m/sec. The velocity near the airfoil, where the stream lines are 1.5 cm apart, is_________________?
A. 22.5 m/sec
B. 33 m/sec
C. 40 m/sec
D. 90 m/sec - Coefficient of contraction for an external cylindrical mouthpiece is_________________?
A. 1.00
B. 0.855
C. 0.7H
D. 0.611 - The Prartdtl mixing length is_________________?
A. zero at the pipe wall
B. maximum at the pipe wall
C. independent of shear stress
D. none of the above - The hydraulic grade line is_________________?
A. always above the centre line of pipe
B. never above the energy grade line
C. always sloping downward in the direction of flow
D. all of the above
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