A. slightly less
B. slightly more
C. nearly half
D. equal
A. 1.00
B. 0.855
C. 0.7H
D. 0.611
A. H1/2
B. H3/2
C. H5/2
D. H
where H is head
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. 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. x”7
B. x,/2
C. x4/5
D. x3/5
where x is the distance from leading edge
A. velocity
B. discharge
C. head
D. pressure
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. 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