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 $$\frac{{{\text{wa}}{{\left( {{\text{V}} - {\text{v}}} \right)}^2}}}{{\text{g}}}$$
In air breathing jet engine, the jet is formed by expanding
A Highly heated atmospheric air
B Solids
C Liquid
D Plasma
In turbo fan engine, the jet velocity as compared to turbojet engine is
A Less
B More
C Same
D May be less or more depending upon speed
Air-fuel ratio in a jet engine will be of the order of
A 10 : 1
B 15 : 1
C 20 : 1
D 60 : 1
An engine pulls four identical carriages. The engine is 2/3 the length of a carriage and the total length of the train is 86.8m. Find the length of the engine.
A 12.4m
B 12m
C 11.5m
D 13m
A two stroke cycle engine gives ________ the number of power strokes as compared to the four stroke cycle engine, at the same engine speed.
A Half
B Same
C Double
D Four times
If the engine coolant leaks into the engine oil, then engine oil
A Appears milky
B Become foamy
C Turns black
D None of these
Who invented Jet Engine?
A Sir Frank Whittle
B Gottlieb Daimler
C Roger Bacon
D Lewis E Waterman
The efficiency of jet engine is
A Lower at low speed
B Higher at high altitudes
C Same at all altitudes
D Higher at high speed

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