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4

The breeding gain in case of thermal breeder reactor as compared to fast breeder reactor is

A. Same

B. Lower

C. Higher

D. Unity

Correct Answer :

B. Lower


Related Questions

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4

The breeding gain in case of thermal breeder reactor as compared to fast breeder reactor is

A. Same

B. Lower

C. Higher

D. Unity

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4

A moderator, apart from its high neutron slowing power, and low non-productive neutron, should be

A. Stable under nuclear radiation

B. Corrosion resistant

C. Good thermal conductor

D. All of these

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4

Nuclear reactors are used

A. To produce heat for thermoelectric power

B. To produce fissionable material

C. To propel ships, submarines, aircrafts

D. All of these

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4

U235 will undergo fission by

A. High energy (fast) neutrons alone

B. Low energy (slow) neutrons alone

C. Either fast or slow neutrons

D. Medium energy neutrons

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4

A moderator generally used in nuclear power plants is

A. Graphite

B. Heavy water

C. Concrete

D. Graphite and concrete

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4

In triggering fission, which types of neutrons are more effective?

A. Fast

B. Slow

C. In bulk

D. Static

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4

The commonly used material for shielding is

A. Lead or concrete

B. Lead and tin

C. Graphite or cadmium

D. Thick galvanised sheets

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4

A reactor capable of converting a ferrite material into fissile isotopes is called

A. Regenerative reactor

B. Fast breeder reactor

C. Breeder reactor

D. Boiling water reactor

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4

A fission chain reaction in uranium can be developed

A. By increasing the contents of U₂₃₅

B. By slowing down fast neutrons so that U₂₃₅ fission continues by slow neutron

C. Both (A) and (B)

D. None of these

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4

Which of the following nuclear reactor does not need a heat exchanger for generation of steam?

A. Gas cooled

B. Liquid metal cooled

C. Pressurised water

D. Boiling water

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4

Superheated steam is generated in following reactor

A. Boiling water

B. Gas cooled

C. Pressurised water

D. All of the above

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4

Boiling water reactor uses the following as moderator, coolant and working fluid

A. Ordinary fluid

B. Heavy water

C. Molten lead

D. Hydrogen gas

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4

The fuel needed, with reflector in nuclear power plant, in order to generate sufficient neutrons to sustain a chain reaction, would be

A. More

B. Less

C. Same

D. Zero

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4

A nuclear fission produces energy of following order in MeV

A. 20

B. 200

C. 2000

D. 20,000

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4

Which of the following particles is the lightest?

A. Nucleus

B. Electron

C. Proton

D. Meson

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4

A power plant giving least running cost of production of electrical power is

A. Steam power plant

B. Gas turbine power plant

C. Hydro electric power plant

D. Nuclear power plant

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4

Effective moderators are those materials which contain

A. Light weight atoms

B. Heavy weight atoms

C. Critical atoms

D. Zero weight atoms

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4

The coolant used in boiling water reactor is

A. CO2

B. Pressurised water

C. Mixture of water and steam

D. Liquid metal

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4

Isotopes of same elements have

A. Same atomic number and different masses

B. Same chemical properties but different atomic numbers

C. Different masses and different atomic numbers

D. Different chemical properties and same atomic numbers

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4

Amongst the following, the fissionable materials are

A. U₂₃₃ and Pu₂₂₉

B. U₂₃₁ and Pu₂₃₃

C. U₂₃₅ and Pu₂₃₅

D. U₂₃₈ and Pu₂₃₉

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4

Which of the following is the heaviest?

A. Neutron

B. Proton

C. Atom

D. Electron

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When a reactor becomes critical, then the production of neutrons is

A. Infinite

B. Zero

C. Exactly balanced by the loss of neutrons through leakage

D. Initiated

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4

Reactors for propulsion applications are designed for

A. Any form of uranium

B. Natural uranium

C. Enriched uranium

D. Plutonium

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4

The presence of reflector in nuclear power plants results in

A. Increased production of neutrons

B. Complete absorption of neutrons

C. Controlled production of neutrons

D. Decreased leakage of neutrons

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4

A nuclear fission is initiated when the critical energy as compared to neutron binding energy of the atoms is

A. Same

B. More

C. Less

D. There is no such criterion

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4

Gas cooled reactor uses following materials as moderator, and coolant

A. Graphite, CO2

B. Graphite, air

C. Heavy water, CO2

D. Lead, H2

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4

The secondary fuel used in nuclear power plants is

A. U₂₃₃ and Pu₂₃₉

B. U₂₃₅ and Th₂₃₂

C. U₂₃₅ and Pu₂₃₈

D. U₂₃₃ and Pu₂₃₈

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4

The predominant isotope of the naturally occuring element is

A. U₂₃₅

B. U₂₃₈

C. Pu₂₃₃

D. Pu₂₃₉

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4

Plutonium (Pu239) is produced

A. Artificially

B. When U238 is irradiated by neutrons

C. By fission of Th232

D. As basic raw material

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4

The total energy released in fission of U is

A. 5 MeV

B. 10 MeV

C. 199 MeV

D. 168 MeV