|
1) Coefficient of contraction for an external cylindrical mouthpiece is_________________? a. 1.00 b. 0.855 c. 0.7H d. 0.611
|
||||
|
2) In a Sutro weir, the discharge is proportional to________________? a. H1/2 b. H3/2 c. H5/2 d. H
|
||||
|
3) 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
|
||||
|
4) 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
|
||||
|
5) The boundary layer thickness in turbulent flow varies as______________? a. xâ7 b. x,/2 c. x4/5 d. x3/5
|
||||
|
6) Ay between two stream lines represents________________? a. velocity b. discharge c. head d. pressure
|
||||
|
7) 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
|
||||
|
8) 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
|
||||
|
9) 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
|
||||
|
10) The value of friction factor âfâ for smooth pipes for Reynolds number 106 is approximately equal to________________? a. 0.1 b. 0.01 c. 0.001 d. 0.0001
|
||||
