A. log-log plot of friction factor against Reynolds number
B. log-log plot of relative roughness against Reynolds number
C. semi-log plot of friction factor against Reynolds number
D. semi-log plot of friction factor against relative roughness
Related Mcqs:
- 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 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 - The discharge through a V- notch varies as______________?
A. H1/2
B. H3’2
C. H5/2
D. H5’4 where H is head - 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 - When time of closure tc = L/v0 (where L is length of pipe and v0 is speed of pressure wavE., the portion of pipe length subjected to maximum head is__________________?
A. L/4
B. L/3
C. L/2
D. L - Two pipe systems are said to be equivalent when_________________?
A. head loss and discharge are same in two systems
B. length of pipe and discharge are same in two systems
C. friction factor and length are same in two systems
D. length and diameter are same in two systems - For laminar flow in a pipe of circular cross-section, the Darcy’s friction factor f is________________?
A. directly proportional to Reynolds number and independent of pipe wall roughness
B. directly proportional to pipe wall roughness and independent of Reynolds number
C. inversely proportional to Reynolds number and indpendent of pipe wall roughness
D. inversely proportional to Reynolds number and directly proportional to pipe wall roughness - The pitot tube is used to measure________________?
A. velocity at stagnation point
B. stagnation pressure
C. static pressure
D. dynamic pressure - 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 - A vertical rectangular plane surface is submerged in water such that its top and bottom surfaces are 1.5 m and 6.0 m res-pectively below the free surface. The position of center of pressure below the free surface will be at a distance of________________?
A. 3.75 m
B. 4.0 m
C. 4.2m
D. 4.5m
