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Current Affairs January 2024

What is the correct answer?

4

The nuclear energy is measured as

A. MeV

B. Curie

C. Farads

D. MW

Correct Answer :

A. MeV


Related Questions

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Solid fuel for nuclear reactions may be fabricated into various small shapes such as

A. Plates

B. Pallets

C. Pins

D. Any one of the above

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4

In boiling water reactor, moderator is

A. Coolant itself

B. Ferrite rod

C. Graphite rod

D. Liquid sodium metal

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4

Enriched uranium is one in which

A. Percentage of U₂₃₅ has been artificially increased

B. Percentage of U has been artificially increased

C. Percentage of U₂₃₄ has been artificially increased

D. Extra energy is pumped from outside

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4

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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4

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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4

The mass number of a substance represents the sum of total number of

A. Protons and neutrons in an atom

B. Protons and electrons in an atom

C. Neutrons and electrons in an atom

D. Protons and neutrons in a nucleus

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4

Which of the following are ferrite materials?

A. U₂₃₃ and Pu₂₃₉

B. U

C. U₂₃₈ and Pu₂₃₉

D. U₂₃₈ and Th₂₃₉

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4

For economical operation of a nuclear plant

A. Used fuel should be reprocessed

B. Moderator should be used

C. Coolant should be employed

D. Control rods should be used

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4

The efficiency of a nuclear power plant in comparison to conventional and nuclear consideration is

A. Higher cost of nuclear fuel

B. High initial cost

C. High heat rejection in condenser

D. Lower temperature and pressure conditions

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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

In natural uranium, the constituents of three naturally occuring isotopes are

A. U₂₃₄ = 0.006%, U₂₃₅ = 0.712% and U₂₃₈ = 99.282%

B. U₂₃₄ = 0.712%, U₂₃₅ = 0.006% and U₂₃₈ = 99.282%

C. U₂₃₄ = 99.282%, U₂₃₅ = 0.006% and U₂₃₈ = 0.712%

D. U₂₃₄ = 0.006%, U₂₃₅ = 99.282% and U₂₃₈ = 0.712%

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4

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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4

Reflector in nuclear power plants _________ neutron leakage.

A. Increases

B. Decreases

C. Have no effect on

D. None of these

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4

In a thermal power plant, coal from the coal handling plant is moved to the boiler bunker through a

A. Belt conveyor

B. Bucket conveyor

C. Fork lift truck

D. Overhead crane

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4

The primary fuel used in nuclear power plants is

A. U₂₃₅

B. U₂₃₈

C. Pu₂₃₉

D. Pu₂₃₃

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4

The energy released during the fission of one atom of Uranium 235 in million electron volts is about

A. 100

B. 200

C. 300

D. 400

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4

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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4

Which of the following is the heaviest?

A. Neutron

B. Proton

C. Atom

D. Electron

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4

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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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

A nuclear unit becoming critical means

A. It is generating power to rated capacity

B. It is capable of generating much more than rated capacity

C. There is danger of nuclear spread

D. Chain reaction that causes automatic splitting of the fuel nuclei has been established

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4

A moderator, in nuclear power plants, is a medium introduced into the fuel mass in order to

A. Slow down the speed of fast moving neutrons

B. Control the reaction

C. Reduce the temperature

D. Extracts heat from nuclear reaction

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4

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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4

A fast breeder reactor uses following as fuel

A. Enriched uranium

B. Plutonium

C. Thorium

D. U₂₃₅

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The most practical fuel for a thermonuclear reactor, both from economical and nuclear consideration is

A. Plutonium

B. Uranium

C. Deuterium

D. Thorium

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4

The fast breeder reactor uses the following moderator

A. Demineralised water

B. Carbon dioxide

C. Heavy water

D. No moderator is used

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4

Ferrite material is

A. The most fissionable material

B. The basic fuel for nuclear paints

C. Basic raw material for nuclear plants

D. The material which absorbs neutrons and undergoes spontaneous changes leading to the formation of fissionable material

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4

The main interest of shielding in nuclear reactor is protection against

A. X-rays

B. Infrared rays

C. Neutrons and gamma rays

D. Electrons

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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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Hydrogen is preferred as better coolant in comparison to CO₂ because former

A. Is lighter

B. Is inert

C. Has high specific heat

D. Is a good conductor