The value of friction factor ‘f’ for smooth pipes for Reynolds number 106 is approximately equal to________________?
A. 0.1
B. 0.01
C. 0.001
D. 0.0001
Fluid Mechanics
In which of the following the friction drag is generally larger than pressure drag?
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
When an ideal fluid flows past a sphere________________?
When an ideal fluid flows past a sphere________________?
A. highest intensity of pressure occurs around the circumference at right angles to flow
B. lowest pressure intensity occurs at front stagnation point
C. lowest pressure intensity occurs at rear stagnation point
D. total drag is zero
Stanton diagram is a______________?
Stanton diagram is a______________?
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
Ay between two stream lines represents________________?
Ay between two stream lines represents________________?
A. velocity
B. discharge
C. head
D. pressure
The boundary layer thickness in turbulent flow varies as______________?
The boundary layer thickness in turbulent flow varies as______________?
A. x”7
B. x,/2
C. x4/5
D. x3/5
where x is the distance from leading edge
The shear stress distribution for a fluid flowing in between the parallel plates, both at rest, is_______________?
The shear stress distribution for a fluid flowing in between the parallel plates, both at rest, is_______________?
A. constant over the cross section
B. parabolic distribution across the section
C. zero at the mid plane and varies linearly with distance from mid plane
D. zero at plates and increases linearly to midpoint
In a Sutro weir, the discharge is proportional to________________?
In a Sutro weir, the discharge is proportional to________________?
A. H1/2
B. H3/2
C. H5/2
D. H
where H is head
Coefficient of contraction for an external cylindrical mouthpiece is_________________?
Coefficient of contraction for an external cylindrical mouthpiece is_________________?
A. 1.00
B. 0.855
C. 0.7H
D. 0.611
Coefficient of discharge for a totally submerged orifice as compared to that for an orifice discharging free is__________________?
Coefficient of discharge for a totally submerged orifice as compared to that for an orifice discharging free is__________________?
A. slightly less
B. slightly more
C. nearly half
D. equal