The diameter (d) of a nozzle fixed at the end of a pipe (diameter D, length L) for maximum energy, is
The ratio of maximum velocity to average velocity of viscous fluid through a circular pipe is
-
0.5 -
0.75 -
1.25 -
2.00
Pick up the correct statement regarding Borda's mouth piece running full from the following :
-
Actual velocity at the out let is gH -
Theoretical velocity at the outlet is 2gH -
Coefficient of velocity is 1/2 -
Coefficient of contraction is 1 -
All the above.
Most economical section of a circular channel for maximum discharge
-
depth of water = 0.95 diameter of circular section -
hydraulic mean depth = 0.286 diameter of circular section -
wetted perimeter = 2.6 diameter of circular section -
wetted perimeter = 2.83 depth of water -
all the above.
A pitot tube is used to measure
-
pressure -
difference in pressure -
velocity of flow -
none of these.
The shear stress distribution in viscous fluid through a circular pipe is :
-
maximum at the centre -
maximum at the inside of surface -
same throughout the section -
none of these.
Differential manometers are used to measure
-
pressure in water channels, pipes, etc. -
difference in pressure at two points -
atmospheric pressure -
very low pressure.
Unit of kinematic viscosity is
-
m2/sec -
Newton sec/m2 -
Newton sec/m3 -
Kg sec/m2.
The thickness of a sharp crested weir is kept less than
-
one-third of the height of water on the sill -
one-half of the height of water on the sill -
one-fourth of the height of water on the sill -
two-third of the height of water on the sill -
none of these.
A tankxxcontaining an oil of specific gravity 0.is moved with an acceleration g/2 m sec2. The ratio of the pressures at its bottom when it is moving vertically up and down, is
-
2 -
3 -
1/2 -
1/3
The property of steam function ψ is :
-
ψ is constant everwhere on any stream line -
the flow around any path in the fluid is zero for continuous flow -
the rate of change of ψ with distance in an arbitrary direction, is proportional to the component of velocity normal to that direction -
the velocity vector may be found by differentiating the stream function -
all the above.
Pick up the correct statement from the following :
-
For tranquil flow h > 2g or v < 
-
For critical flow -
For torrential flow h > or v < gh -
None of these.
The maximum vacuum created at the summit of a syphon is
-
2.7 m of water -
7.4 m of water -
5.5 m of water -
none.
Time of emptying liquid from a hemispherical vessel through an orifice at its bottom, is
The side slope of Cipolletti weir is generally kept
-
1 to 4 -
1 to 3 -
1 to 2 -
1 : 5
Highest dam in India, is
-
Bhakra dam -
Hirakund dam -
Nagarjuna Sagar dam -
Iddiki dam.
The side slope of Cipolletti weir is generally kept
-
1 to 4 -
1 to 3 -
1 to 2 -
1 : 5
If the atmospheric pressure on the surface of an oil tank (sp. gr. 0.is 0.1 kg/cm2, the pressure at a depth of 2.5 m, is
-
1 metre of water -
2 metres of water -
3 metres of water -
3.5 metres of water -
4.0 metres of water.
Highest dam in India, is
-
Bhakra dam -
Hirakund dam -
Nagarjuna Sagar dam -
Iddiki dam.
Critical depth (h) of a channel, is
Critical depth (h) of a channel, is