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.
Related Mcqs:
- Select the incorrect statement?
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 - 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 - The continuity equation pi V,A,= p2V2A2 is based on the following assumption regarding flow of fluid______________?
A. steady flow
B. uniform flow
C. incompressible flow
D. frictionless flowwhere pi and p2 are mass densities
- Which of the following is used to measure the discharge ?
A. current meter
B. venturimeter
C. pitot tube
D. hotwire anemometer - Which of the following statements is correct ?
A. Lower critical Reynolds number is of no practical significance in pipe flow problems.
B. Upper critical Reynolds number is significant in pipe flow problems.
C. Lower critical Reynolds number has the value 2000 in pipe flow
D. Upper critical Reynolds number is the number at which turbulent flow changes to laminar flow - 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 - Which of the following has highest coefficient of discharge ?
A. sharp edged orifice
B. venturimeter
C. Borda’s mouthpiece running full
D. CipoUetti weir - Which of the following velocity potentials satisfies continuity equation ?
A. x2y
B. x2-y2
C. cosx
D. x2 + y2 - 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
- The ratio of average velocity to maximum velocity for steady laminar flow in circular pipes is_______________?
A. 1/2
B. 2/3
C. 3/2
D. 2
