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 power available for takeoff and climb in case of turbojet engine as compared to reciprocating engine is
A Less
B More
C Same
D May be less or more depending on ambient conditions
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 a turbo jet engine, subsequent to heat addition to compressed air, to get the power output, the working substance is expanded in
A Exit nozzle, which is a constant volume process
B Exit nozzle, which is essentially an isentropic process
C Turbine blades, which is a constant volume process
D Turbine blades, which is essentially an isentropic process
The capacity of induced draft fan compared to forced draft fan in a boiler is
A Same
B More
C Less
D Less or more depending on size of boiler
For the same draught produced the power of induced draught fan as compared to forced draught fan is
A less
B more
C same
D not predictable
The turbine of the turboprop engine is __________ that of the turbojet engine.
A Same as
B Smaller than
C Bigger than
D None of these
The maximum propulsive efficiency of a turbojet engine is at a speed of
A 1000 km/h
B 2000 km/h
C 2400 km/h
D 3000 km/h
A simple turbojet engine is basically
A A propeller system
B Gas turbine engine equipped with a propulsive nozzle and diffuse
C Chemical rocket engine
D Ramjet engine
If a man reduces the selling price of a fan from Tk. 400 to Tk. 380, his loss increases by 2%. The cost price of the fan is:
A Tk.480
B Tk.600
C Tk. 1000
D Tk. 1060

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