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Current Affairs January 2024

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Which of the following is the heaviest?

A. Neutron

B. Proton

C. Atom

D. Electron

Correct Answer :

C. Atom


Related Questions

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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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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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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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Which of the following is the heaviest?

A. Neutron

B. Proton

C. Atom

D. Electron

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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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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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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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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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Electron volt is the unit of

A. Atomic power

B. Energy

C. Voltage

D. Radio activity

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Which is not identical for an atom and an isotope?

A. Mass number

B. Atomic number

C. Chemical properties

D. Position in periodic table

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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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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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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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Each fission of U₂₃₅ produces following number of fast neutrons per fission

A. 1 neutron

B. 3 neutrons

C. 1, 2 neutrons

D. 2 neutrons

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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

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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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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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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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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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A fast breeder reactor

A. Uses graphite rods as moderator

B. Has powerful moderator

C. Has no moderator

D. Uses ferrite material as moderator

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The process by which a heavy nucleus is spitted into two light nuclei is known as

A. Splitting

B. Fission

C. Fusion

D. Disintegration

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A fast breeder reactor uses following as fuel

A. Enriched uranium

B. Plutonium

C. Thorium

D. U₂₃₅

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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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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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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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Uranium has isotopes

A. U₂₃₄

B. U₂₃₅

C. U₂₃₈

D. All of these

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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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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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A boiling water reactor uses following as fuel

A. Enriched uranium

B. Plutonium

C. Thorium

D. U

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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