Related Questions

In an internal mouthpiece, the absolute pressure head at vena contracta is __________ the atmospheric pressure head by an amount equal to height of the liquid above the vena contracta.
A Less than
B More than
C Equal to
D None of these
A jet of water is striking at the centre of a curved vane moving with a uniform velocity in the direction of jet. For the maximum efficiency, the vane velocity is ________ of the jet velocity
A One-half
B One-third
C Two-third
D Three-fourth
The actual velocity at vena-contracta for flow through an orifice from a reservoir is given by
A $${{\text{C}}_{\text{v}}} \cdot \sqrt {2{\text{gH}}} $$
B $${{\text{C}}_{\text{c}}} \cdot \sqrt {2{\text{gH}}} $$
C $${{\text{C}}_{\text{d}}} \cdot \sqrt {2{\text{gH}}} $$
D $${{\text{C}}_{\text{v}}} \cdot {{\text{V}}_{\text{a}}}$$
Vena-contracta pressure tapping is at a distance __________ from the position of an orificemeter fitted in a pipe of internal diameter 'd'
A d
B 0.5d
C 2d
D 4d
In a short cylindrical external mouthpiece, the vena contracta occurs at a distance __________ the diameter of the orifice from the outlet of orifice.
A Equal to
B One-fourth
C One-third
D One-half
Vena-contracta formed during flow of a liquid through an orificemeter has
A Minimum liquid cross-section
B More diameter compared to orifice diameter
C Minimum velocity of fluid stream
D None of these
Location of vena-contracta in an orificemeter does not depend upon the
A Type of orifice
B Density, viscosity & compressibility of the fluid
C Ratio of pipe diameter to orifice diameter
D Pipe roughness
The force exerted by a jet of water impinging normally on a plate which due to the impact of jet, moves in the direction of jet with a velocity v is
A $$\frac{{{\text{wa}}\left( {{\text{V}} - {\text{v}}} \right)}}{{2{\text{g}}}}$$
B $$\frac{{{\text{wa}}\left( {{\text{V}} - {\text{v}}} \right)}}{{\text{g}}}$$
C $$\frac{{{\text{wa}}{{\left( {{\text{V}} - {\text{v}}} \right)}^2}}}{{2{\text{g}}}}$$
D $$\frac{{{\text{wa}}{{\left( {{\text{V}} - {\text{v}}} \right)}^2}}}{{\text{g}}}$$
Theoretical flame temperature of a fuel is that temperature which is attained, when the fuel is completely burnt 'using theoretical amount of air in
A Air
B Oxygen
C Either A or B
D Either A or C without gain or loss of heat
The net positive suction head (NPSH) of a centrifugal pump is defined as the sum of the velocity head and the pressure head at the
A Discharge
B Suction
C Suction minus vapor pressure of the liquid at suction temperature
D Discharge minus vapor pressure of the liquid at the discharge temperature

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