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Current Affairs January 2024

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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

Correct Answer :

A. Used fuel should be reprocessed


Related Questions

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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

The unit of radioactivity is

A. Electron volt

B. Electron ampere

C. Curie

D. MV

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4

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

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

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

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

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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4

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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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

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

Half life of a radioactive isotope corresponds to the time required for half of the following to decay

A. Electrons

B. Protons

C. Neutrons

D. Atom

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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

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

In a fission process, maximum percentage of energy is released as

A. Kinetic energy of neutrons

B. Kinetic energy of fission products

C. Instantaneous release of gamma rays

D. Gradual radioactive decay of fission products

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4

In order to have constant chain reaction to produce a constant rate of heat output, the value of ratio of the number of neutrons in one generation to the number of neutrons in the immediately preceding generation must be

A. Greater than 1.0

B. Less than 1.0

C. Equal to zero

D. Equal to 1.0

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4

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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4

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

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

Atomic number of an element in the periodic table represents the numbers of

A. Protons in the nucleus

B. Electrons in the nucleus

C. Neutrons in the nucleus

D. Electrons in the atom

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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

Reactors for propulsion applications use

A. Natural uranium

B. Molten lead

C. Any form of uranium

D. Thorium

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4

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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4

A fast breeder reactor uses

A. 90% U₂₃₅

B. U₂₃₈

C. U₂₃₅

D. Pu₂₃₉

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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

Moderator in nuclear plants is used to

A. Reduce temperature

B. Extract heat from nuclear reaction

C. Control the reaction

D. Cause collision with the fast moving neutrons to reduce their speed

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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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4

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

A. Same

B. More

C. Less

D. May be less or mote depending on size

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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

Fast breeder reactor uses

A. Boiler

B. Direct cycle of coolant system

C. Double circuit system of coolant cycle

D. Multi passes system

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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