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 $$\frac{{{\text{wa}}{{\left( {{\text{V}} - {\text{v}}} \right)}^2}}}{{\text{g}}}$$
A burnt child dreads the Fire. here `burnt is a/an______.
A finite verb
B gerund
C present participle
D past participle
A burnt child dreads the fire. Here burnt is.....
A finite verb
B gerund
C present participle
D past participle
A burnt child dreads the fire. Here 'burnt' is a/an-
A finite verb
B gerund
C present participle
D past participle
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
In jet engines, paraffin is usually used as the fuel because of its
A High calorific value
B Ease of atomisation
C Low freezing point
D Both (A) and (C) above
If h₁ = inner film co-efficient and /h₂ = outer film co-efficient, then the overall heat transfer co-efficient is
A Always less than h₁
B Always between h₁ and h₂
C Always higher than h₂
D Dependent on metal resistance
A closed gas turbine in which fuel is burnt directly in the air is not possible because of
A Paucity of O2
B Increasing gas temperature
C High specific volume
D High friction losses
The amount of water evaporated in kg per kg of fuel burnt is called
A Evaporative capacity of a boiler
B Equivalent evaporation from and at 100°C
C Boiler efficiency
D None of these

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