Fluid Mechanics

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

A. velocity
B. discharge
C. head
D. pressure

A. x”7
B. x,/2
C. x4/5
D. x3/5

where x is the distance from leading edge

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

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

A. H1/2
B. H3/2
C. H5/2
D. H

where H is head

A. 1.00
B. 0.855
C. 0.7H
D. 0.611

A. slightly less
B. slightly more
C. nearly half
D. equal

A. is independent of Reynolds number
B. decreases with higher Reynolds number
C. is equal to the coefficient of discharge of venturimeter
D. none of the above

A. H1/2
B. H3’2
C. H5/2
D. H5’4 where H is head