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Current Affairs January 2024

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4

Pressurised water reactor is designed

A. For boiling pi water in the core

B. To use liquid sodium metal as coolant

C. To use intermediate coolant

D. To prevent the water coolant from boiling in the core

Correct Answer :

D. To prevent the water coolant from boiling in the core


Related Questions

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In triggering fission, the following types of neutrons are desirable

A. Fast moving

B. Slow moving

C. Critical neutrons

D. Neutrons at rest

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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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4

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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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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Reactors for propulsion applications use

A. Natural uranium

B. Molten lead

C. Any form of uranium

D. Thorium

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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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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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In boiling water reactor, moderator is

A. Coolant itself

B. Ferrite rod

C. Graphite rod

D. Liquid sodium metal

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4

The nuclear energy is measured as

A. MeV

B. Curie

C. Farads

D. MW

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The material most commonly used for shielding is

A. Carbon

B. Lead

C. Concrete

D. All of these

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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

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

A boiling water reactor uses following as fuel

A. Enriched uranium

B. Plutonium

C. Thorium

D. U

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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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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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Natural uranium is made up of

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

B. 99.282% U₂₃₅, 0.712% U₂₃₈, 0.06%' U₂₃₄

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

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

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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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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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A nuclear reactor is said to be critical when the neutron population in the reactor core is

A. Rapidly increasing leading to the point of explosion

B. Decreasing from the specified value

C. Reduced to zero

D. Constant

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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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The function of control rods in nuclear plants is to

A. Control temperature

B. Control radioactive pollution

C. Control absorption of neutron

D. Control fuel consumption

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4

The unit of radioactivity is

A. Electron volt

B. Electron ampere

C. Curie

D. MV

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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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Electron volt is the unit of

A. Atomic power

B. Energy

C. Voltage

D. Radio activity

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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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Breeder reactor has a conversion ratio of

A. Unity

B. More than unity

C. Less than unity

D. Zero

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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 following present serious difficulty in designing reactor shield

A. Alpha particles

B. Beta particles

C. Thermal neutrons

D. Fast neutrons and gamma rays

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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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Uranium has isotopes

A. U₂₃₄

B. U₂₃₅

C. U₂₃₈

D. All of these