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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

Correct Answer :

D. Boiling water


Related Questions

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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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In nuclear fission each neutron that causes fission releases

A. No new neutron

B. At least one new neutron

C. One new neutron

D. More than one new neutron

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The nuclear radiators produced in a reactor which must be shielded are

A. Electrons

B. α, β and γ rays

C. Neutron and gamma rays

D. None of these

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A fast breeder reactor uses

A. 90% U₂₃₅

B. U₂₃₈

C. U₂₃₅

D. Pu₂₃₉

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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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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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In nuclear fission

A. The original elements change into completely different elements

B. The electrons of the element change

C. The molecules rearrange themselves to form other molecules

D. None of the above

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The total energy released in fission of U is

A. 5 MeV

B. 10 MeV

C. 199 MeV

D. 168 MeV

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Which of the following can be used as a coolant in nuclear plant?

A. Light or heavy water

B. Molten lead

C. Carbon dioxide

D. Freon

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Reactors designed for propulsion applications are designed for

A. Natural uranium

B. Enriched uranium

C. Pure uranium

D. Any type of uranium

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One gram of uranium will produce energy equivalent to approximately

A. 1 tonne of high grade coal

B. 4.5 tonnes of high grade coal

C. 10 tonnes of high grade coal

D. 100 tonnes of high grade coal

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Reflector in nuclear power plants _________ neutron leakage.

A. Increases

B. Decreases

C. Have no effect on

D. None of these

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Boiling water reactor employs

A. Boiler

B. Direct cycle of coolant system

C. Double circuit system of coolant cycle

D. Multi passes system

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A moderator

A. Absorbs neutrons

B. Does not absorb neutrons

C. Accelerates neutrons

D. None of these

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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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U233 is produced

A. As basic raw material

B. By neutron irradiation of Uz

C. By neutron irradiation of thorium

D. Artificially

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Which of the following statement is correct regarding the features of a Breeder reactor?

A. It produces more fuel than it consumes.

B. It requires highly enriched fuel.

C. It requires liquid sodium metal as moderator.

D. All of the above

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Which of the following type of pump is used in liquid metal cooled reactor for circulation of liquid metal

A. Centrifugal

B. Axial

C. Reciprocation

D. Electromagnetic

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A pressurised water reactor employs pressurises for the following application

A. To maintain constant pressure in primary circuit under varying load

B. To Supply high pressure steam

C. To increase pressure of water in primary circuit

D. To provide sub cooled water at high pressure

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The size of the reactor is said to be critical when

A. Chain reaction can be initiated

B. It becomes uncontrollable

C. It explodes

D. It produces no power

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The unit of radioactivity is

A. Electron volt

B. Electron ampere

C. Curie

D. MV

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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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The energy required to be applied to a radioactive nucleus for the emission of a neutron is

A. 1 MeV

B. 2.4 MeV

C. 4.3 MeV

D. 7.8 MeV

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Which of the following is more appropriate for a moderator? One which

A. Does not absorb neutrons

B. Absorbs neutrons

C. Accelerates neutrons

D. Eats up neutrons

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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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Pick up the wrong statement

A. In a heterogeneous or solid fuel reactor, the fuel is mixed in a regular pattern within moderator.

B. Slow or thermal neutrons have energy of the order or 0.025 eV

C. Fast neutrons have energies above 1000 eV

D. Fast reactor uses moderator

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Enriched uranium may contain fissionable contents of the order of

A. 1-99 %

B. 1-25 %

C. 1-50 %

D. 1-75 %

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A fission chain reaction in uranium can be developed by

A. Slowing down fast neutrons so that Uz fission continues by slow motion neutrons

B. Accelerating fast neutrons

C. Absorbing all neutrons

D. Using moderator

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Each fission of U₂₃₅ produces on the average _________ fast neutrons as a product of reaction.

A. 2.46

B. 24.6

C. 246

D. 2460

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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