Home
Current Affairs January 2024

What is the correct answer?

4

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

Correct Answer :

C. Has high specific heat


Related Questions

What is the correct answer?

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

What is the correct answer?

4

Reflector in nuclear plants is used to

A. Return the neutrons back into the core

B. Shield the radioactivity completely

C. Check pollution

D. Conserve energy

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

Pick up the wrong statement fast breeder reactors

A. Operate at extremely high power densities.

B. Are liquid metal cooled

C. Produce more fuel than they consume

D. Use water as coolant

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

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%

What is the correct answer?

4

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

What is the correct answer?

4

A fast breeder reactor uses following as fuel

A. Enriched uranium

B. Plutonium

C. Thorium

D. U₂₃₅

What is the correct answer?

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

What is the correct answer?

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

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

The secondary fuel used in nuclear power plants is

A. U₂₃₃ and Pu₂₃₉

B. U₂₃₅ and Th₂₃₂

C. U₂₃₅ and Pu₂₃₈

D. U₂₃₃ and Pu₂₃₈

What is the correct answer?

4

The primary fuel used in nuclear power plants is

A. U₂₃₅

B. U₂₃₈

C. Pu₂₃₉

D. Pu₂₃₃

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

One gram of uranium will produce energy equivalent to approximately

A. 1 tonne of high grade coal

B. 4.5 tonnes of high grade coal

C. 10 tonnes of high grade coal

D. 100 tonnes of high grade coal

What is the correct answer?

4

Electron volt is the unit of

A. Atomic power

B. Energy

C. Voltage

D. Radio activity

What is the correct answer?

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

What is the correct answer?

4

A moderator

A. Absorbs neutrons

B. Does not absorb neutrons

C. Accelerates neutrons

D. None of these

What is the correct answer?

4

In triggering fission, which types of neutrons are more effective?

A. Fast

B. Slow

C. In bulk

D. Static

What is the correct answer?

4

Which of the following can be used as a coolant in nuclear plant?

A. Light or heavy water

B. Molten lead

C. Carbon dioxide

D. Freon

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

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

What is the correct answer?

4

Enriched uranium is required as a fuel in a nuclear reactor, if light water is used as moderator and coolant, because light water has

A. High neutron absorption cross-section

B. Low moderating efficiency

C. High neutron scatter cross-section

D. Low neutron absorption cross-section

What is the correct answer?

4

U238 will undergo fission by

A. High energy (fast) neutrons alone

B. Low energy (slow) neutrons alone

C. Either fast or slow neutrons

D. Medium energy neutrons

What is the correct answer?

4

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

A. Splitting

B. Fission

C. Fusion

D. Disintegration

What is the correct answer?

4

Reactors designed for propulsion applications are designed for

A. Natural uranium

B. Enriched uranium

C. Pure uranium

D. Any type of uranium

What is the correct answer?

4

U₂₃₃ is produced

A. Artificially

B. As basic raw material

C. When thorium is irradiated by neutrons

D. By fission of U₂₃₈

What is the correct answer?

4

Superheated steam is generated in following reactor

A. Boiling water

B. Gas cooled

C. Pressurised water

D. All of the above

What is the correct answer?

4

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

What is the correct answer?

4

Where reactor operation is designed with fast neutrons such as in reactors using highly enriched fuel, the moderator used is

A. Heavy water

B. Graphite

C. Carbon dioxide

D. No moderator is needed