A. The pressure intensity at vena contracta is atmospheric
B. Contraction is least at vena contracta
C. Stream lines are parallel throughout the jet at vena contracta
D. Coefficient of contraction is always less than one
Related Mcqs:
- Which of the following is an incorrect statement ?
A. Coefficient of contraction of a venturimeter is unity
B. Flow nozzle is cheaper than venturimeter but has higher energy loss
C. Discharge is independent of orientation of venturimeter whether it is horizontal, vertical or inclined
D. None of the above statement is correct. - Select the correct statement?
A. The absolute roughness of a pipe de-creases with time
B. A pipe becomes smooth after using for long time
C. The friction factor decreases with time
D. The absolute roughness increases with time - Centre of buoyancy always_________________?
A. coincides with the centre of gravity
B. coincides with the centroid of the volume of fluid displaced
C. remains above the centre of gravity
D. remains below the centre of gravity - The motion of air mass in a tornado is a________________?
A. free vortex motion
B. forced vortex motion
C. free vortex at center and forced vortex outside
D. forced vortex at center and free vortex outside - The discharge through a V- notch varies as______________?
A. H1/2
B. H3’2
C. H5/2
D. H5’4 where H is head - In which of the following the friction drag is generally larger than pressure drag?
A. a circular disc or plate held normal to flow
B. a sphere
C. a cylinder
D. an airfoil - The speed of a pressure wave through a pipe depends upon________________?
A. the length of pipe
B. the viscosity of fluid
C. the bulk modulus for the fluid
D. the original head - 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 - A right circular cylinder open at the top is filled with liquid and rotated about its vertical axis at such a speed that half the liquid spills out, then the pressure intensity at the center of bottom is___________________?
A. zero
B. one-fourth its value when cylinder was full
C. one-half its value when cylinder was full
D. cannot be predicted from the given data - Newton’s law of viscosity relates________________?
A. intensity of pressure and rate of angular deformation
B. shear stress and rate of angular deformation
C. shear stress, viscosity and temperature
D. viscosity and rate of angular deformation
