Tag: nuclear physics

Quizzes (6) Questions (198)

Questions Related to nuclear physics

Multiple choice chemistry nuclear physics nuclear reactor the nuclear power station isotopes and nuclear chemistry

Which is the material responsible for controlling the chain reaction in nuclear reactor?

  1. Boron

  2. Zirconium

  3. Beryllium

  4. Lead
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Beryllium

Beryllium is considered to be a basically an excellent material fir moderators and reflectors in nuclear reaction, because of its nuclear properties and many of its other physical and mechanical properties.

Multiple choice chemistry nuclear physics nuclear reactor the nuclear power station isotopes and nuclear chemistry

In a nuclear reactor, it is desirable to use reactor core in the form of ____________.

  1. cubical or cylindrical

  2. cubical or spherical

  3. cylindrical or spherical

  4. spherical
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

In a nuclear reactor core from a physical standpoint, the best reactor core shape is a sphere, but design considerations often dictate a cylindrical shape.

Multiple choice chemistry nuclear physics nuclear reactor the nuclear power station isotopes and nuclear chemistry

In nuclear reactor, graphite is used as ___________.

  1. Fuel

  2. Coolant

  3. Moderator

  4. Electrode
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

In nuclear engineering, a neutron moderator is a medium that reduces the speed of fast neutrons, thereby turning them into thermal neutrons capable of sustaining a nuclear chain reaction involving U-235 or a fissile nuclide. Graphite is used as moderator in nuclear reactor.

Multiple choice chemistry nuclear physics nuclear reactor the nuclear power station isotopes and nuclear chemistry

In a nuclear reactor, nuclear energy is obtained by breaking the nucleus of uranium by :

  1. fast moving neutrons

  2. fast moving electrons

  3. slow moving electrons

  4. slow moving neutrons
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

D

In fission each nucleus of uranium -235 emits on an average more than two neutrons. If one of these two neutrons is absorbed by another uranium -235 nucleus, causing it to fission, thus we can have a sustainable chain reaction. However, only a slow neutron, rather than a fast neutron has a high cross section( chance) of absorption. That is why slow moving neutrons are used. 

Multiple choice chemistry nuclear physics nuclear reactor the nuclear power station isotopes and nuclear chemistry

The sources of energy obtained in a nuclear reaction are :

  1. Mass defect

  2. Binding energy

  3. Fission

  4. Fusion

  5. All of these
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

In fusion a heavy nucleus is splitted into two nuclei of comparable masses. The mass of parent nucleus is greater than the total mass of daughter nuclei, some mass is disappeared, this is mass defect and this mass appeared as the binding energy.

In fusion two or more than two light nuclei fuse together to form a heavy nucleus. The sum of masses of light nuclei is greater than the total mass of heavy nucleus, some mass is disappeared, this is mass defect and this mass appeared as the binding energy.