Reactors for propulsion applications are designed for

Reactors designed for propulsion applications are designed for

A

Natural uranium

B

Enriched uranium

C

Pure uranium

D

Any type of uranium

A first order reaction is to be treated in a series of two mixed reactors. The total volume of the two reactors is minimum, when the reactors are

A

Equal in size

B

Of different sizes

C

Of such size that the ratio of their volumes is

D

None of these

Reactors for propulsion applications use

A

Natural uranium

B

Molten lead

C

Any form of uranium

D

Thorium

Where reactor operation is designed with fast neutrons such as in reactors using highly enriched fuel, the moderator used is

A

Heavy water

B

Graphite

C

Carbon dioxide

D

No moderator is needed

A similar word to "propulsion" is

A

energy

B

compulsion

C

Tight

D

thrust

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

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%

Reactors for propulsion applications are designed for

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