Related Questions

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 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 $$\frac{{{\text{wa}}{{\left( {{\text{V}} - {\text{v}}} \right)}^2}}}{{\text{g}}}$$
For laminar flow of a shear thinning liquid in a pipe, if the volumetric flow rate is doubled, the pressure gradient will increase by a factor of
A 2
B > 2
C $$\frac{1}{2}$$
In air breathing jet engine, the jet is formed by expanding
A Highly heated atmospheric air
B Solids
C Liquid
D Plasma
Choose the word that best completes the sentence : Noise pollution generally receives less attention than ----- air pollution.
A does
B it does
C over
D it does over
Air pollution caused by industrial fumes "has" been studied for years, "but " only recently "has" the harmful effects of noise pollution "become" known.
A 1
B 2
C 3
D 4
Noise pollution generally receives less attention than------ air pollution.
A does
B it does
C over
D it does over
For supersonic transport aircraft, the minimum turning radius of taxiway is
A 60 m
B 120 m
C 180 m
D 240 m
The cooling system used for supersonic aircrafts and rockets is
A Simple air cooling system
B Bootstrap air cooling system
C Reduced ambient air cooling system
D Regenerative air cooling system
The flow of steam is supersonic
A At the entrance to the nozzle
B At the throat of the nozzle
C In the convergent portion of the nozzle
D In the divergent portion of the nozzle

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