Home
Current Affairs January 2024

What is the correct answer?

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

Correct Answer :

D. More than one new neutron


Related Questions

What is the correct answer?

4

Ideally the neutron flux in reactor should be

A. Maximum in centre and zero at side

B. Maximum at side and zero in canter

C. Uniform throughout

D. Zero throughout

What is the correct answer?

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

What is the correct answer?

4

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

What is the correct answer?

4

Which of the following is the heaviest?

A. Neutron

B. Proton

C. Atom

D. Electron

What is the correct answer?

4

A fast breeder reactor uses

A. 90% U₂₃₅

B. U₂₃₈

C. U₂₃₅

D. Pu₂₃₉

What is the correct answer?

4

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

What is the correct answer?

4

The coolant used in boiling water reactor is

A. CO2

B. Pressurised water

C. Mixture of water and steam

D. Liquid metal

What is the correct answer?

4

The nuclear energy is measured as

A. MeV

B. Curie

C. Farads

D. MW

What is the correct answer?

4

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

What is the correct answer?

4

Effective moderators are those materials which contain

A. Light weight atoms

B. Heavy weight atoms

C. Critical atoms

D. Zero weight atoms

What is the correct answer?

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

What is the correct answer?

4

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

What is the correct answer?

4

Plutonium (Pu239) is produced

A. Artificially

B. When U238 is irradiated by neutrons

C. By fission of Th232

D. As basic raw material

What is the correct answer?

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

What is the correct answer?

4

The commonly used material for shielding is

A. Lead or concrete

B. Lead and tin

C. Graphite or cadmium

D. Thick galvanised sheets

What is the correct answer?

4

Gas cooled reactor uses following materials as moderator, and coolant

A. Graphite, CO2

B. Graphite, air

C. Heavy water, CO2

D. Lead, H2

What is the correct answer?

4

A fast breeder reactor

A. Uses graphite rods as moderator

B. Has powerful moderator

C. Has no moderator

D. Uses ferrite material as moderator

What is the correct answer?

4

Enriched uranium may contain fissionable contents of the order of

A. 1-99 %

B. 1-25 %

C. 1-50 %

D. 1-75 %

What is the correct answer?

4

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

What is the correct answer?

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

What is the correct answer?

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

What is the correct answer?

4

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

A. Plutonium

B. Uranium

C. Deuterium

D. Thorium

What is the correct answer?

4

The total energy released in fission of U is

A. 5 MeV

B. 10 MeV

C. 199 MeV

D. 168 MeV

What is the correct answer?

4

The risk of radioactive hazard is greatest in the turbine with following reactor

A. Pressurised water

B. Boiling water

C. Gas cooled

D. Liquid metal cooled

What is the correct answer?

4

Which of the following is the primary fuel?

A. U₂₃₃

B. U

C. U₂₃₈

D. Pu

What is the correct answer?

4

A boiling water reactor uses following as fuel

A. Enriched uranium

B. Plutonium

C. Thorium

D. U

What is the correct answer?

4

Amongst the following, the fissionable materials are

A. U₂₃₃ and Pu₂₂₉

B. U₂₃₁ and Pu₂₃₃

C. U₂₃₅ and Pu₂₃₅

D. U₂₃₈ and Pu₂₃₉

What is the correct answer?

4

Reactors for propulsion applications are designed for

A. Any form of uranium

B. Natural uranium

C. Enriched uranium

D. Plutonium

What is the correct answer?

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

What is the correct answer?

4

The most commonly used moderator in nuclear plants is

A. Heavy water

B. Concrete and bricks

C. Graphite and concrete

D. Graphite