Related Questions

In a jet propulsion
A The propulsive matter is ejected from within the propelled body
B The propulsive matter is caused to flow around the propelled body
C Its functioning does not depend upon presence of air
D None of the above
Reactors for propulsion applications use
A Natural uranium
B Molten lead
C Any form of uranium
D Thorium
Reactors designed for propulsion applications are designed for
A Natural uranium
B Enriched uranium
C Pure uranium
D Any type of uranium
Reactors for propulsion applications are designed for
A Any form of uranium
B Natural uranium
C Enriched uranium
D Plutonium
The efficiency of jet propulsion for a ship with inlet orifices at right angles to the direction of motion of ship is given by
A $$\frac{{2\left( {{{\text{V}}_{\text{r}}} - {\text{v}}} \right){\text{v}}}}{{{\text{V}}_{\text{r}}^2}}$$
B $$\frac{{2\left( {{{\text{V}}_{\text{r}}} + {\text{v}}} \right){\text{v}}}}{{{\text{V}}_{\text{r}}^2}}$$
C $$\frac{{\left( {{{\text{V}}_{\text{r}}} - {\text{v}}} \right){\text{v}}}}{{{{\text{V}}_{\text{r}}}}}$$
D $$\frac{{\left( {{{\text{V}}_{\text{r}}} + {\text{v}}} \right){\text{v}}}}{{{{\text{V}}_{\text{r}}}}}$$
In a jet propulsion unit, the products of combustion after passing through the gas turbine are discharged into
A Atmosphere
B Vacuum
C Discharge nozzle
D Back to the compressor
In jet propulsion power unit, the inlet duct of diverging shape is used in order to
A Collect more air
B Convert kinetic energy of air into pressure energy
C Provide robust structure
D Beautify the shape
Propulsion efficiency of the following order is obtained in practice
A 34%
B 50%
C 60%
D 72%
The maximum propulsion efficiency of a turbojet is attained at around following speed
A 550 km/hr
B 1050 km/hr
C 1700 km/hr
D 2400 km/hr
The water in a jet propelled boat is drawn through the openings facing the direction of motion of the boat. The efficiency of propulsion is given by
A $$\frac{{2{\text{v}}}}{{{{\text{V}}_{\text{r}}} - {\text{v}}}}$$
B $$\frac{{2{\text{v}}}}{{{{\text{V}}_{\text{r}}} + {\text{v}}}}$$
C $$\frac{{\text{V}}}{{{{\text{V}}_{\text{r}}} - {\text{v}}}}$$
D $$\frac{{\text{V}}}{{{{\text{V}}_{\text{r}}} + {\text{v}}}}$$

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