| 1. | In an isothermal atmosphere, the pressure ? | |
|
decreases linearly with elevation
|
||
|
remains constant
|
||
|
varies in the same way as the density
|
||
|
increases exponentially with elevation
|
||
View Answer
Discuss in Forum
Report Question| 2. | The flow of any fluid, real or ideal, must fulfill the following ? | |
|
Newton’s law of viscosity
|
||
|
Newton’s second law of viscosity
|
||
|
velocity at boundary must be zero relative to the boundary
|
||
|
the continuity equation
|
||
| 3. | The most economical section of circular channel for maximum discharge is obtained when (Where, d is the diameter of circular section) ? | |
|
depth of water = 0.95 d
|
||
|
wetter perimeter = 2.6 d
|
||
|
hydraulic mean depth = 0.29 d
|
||
|
Any one of these
|
||
| 4. | Borda’s mouthpiece is ? | |
|
a short cylindrical tube projecting inward, having length of ½ diameter
|
||
|
a convergent tube having length of 2 – 3 diameters
|
||
|
most commonly used
|
||
|
rarely used
|
||
| 5. | The critical velocity as ? | |
|
maximum attainable velocity
|
||
|
terminal velocity
|
||
|
velocity when hydraulic jump occurs
|
||
|
velocity above which the flow ceases to be streamlined
|
||
| 6. | Reynolds number for non-circular cross section is {V=mean velocity, v=kinematic viscosity, P= Ratio of cross sectional area to the wetter perimeter} ? | |
|
V.4P/v
|
||
|
V.P/v
|
||
|
V.2P/4v
|
||
|
V.P/4v
|
||
| 7. | In case of a two dimensional flow the components of velocity are given by u= ax; v = by; the streamlines will consist of a series of ? | |
|
circular arcs
|
||
|
parabolic arcs
|
||
|
hyperbolic arcs
|
||
|
elliptical arcs
|
||
| 8. | Friction factor of pipes depends on ? | |
|
rate of flow
|
||
|
fluid density
|
||
|
viscosity
|
||
|
All options are correct
|
||
| 9. | Which of the following represents steady uniform flow ? | |
|
flow through an expanding tube at an increasing rate
|
||
|
flow through an expanding tube at constant rate
|
||
|
flow through a long pipe at decreasing rate
|
||
|
flow through a long pipe at constant rate
|
||
| 10. | Chezy’s equation is used to determine ? | |
|
velocity of flow in open channel
|
||
|
velocity of flow in pipe
|
||
|
flow over weirs
|
||
|
discharge through notch
|
||