Tag: the nuclear power station

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

Heavy water is used in nuclear reactor as _________.

  1. Coolant

  2. Moderator

  3. Both coolant and moderator

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

Both coolant and moderator.

Heary water ( $D _20$ )  also called deuterium oxide, water composed of deuterium, the hydrogen isotope with a mass double that of ordinary hydrogen and oxygen. The heary water is used as a moderator of neutrons and also as a coolent in nuclear power plants.

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

How many nuclear power plants does India have in 2018?

  1. 2

  2. 3

  3. 7

  4. None of these
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
India has 7 nuclear power plants

India has 22 nuclear reactors in the operation in 7 nuclear power plants, having a total installed capacity of 6780 MW.
List of nuclear power plants
1. Tarapura
operator- NPCIL
Location- Maharashtra
2. Rawatbhata
operator- NPCIL
Location- Rajasthan
3.Kundankulam
operator- NPCIL
Location- Tamil Nadu
4. Kaiga 
operator- NPCIL
Location- Karnataka
5. Kakrapur
operator- NPCIL
Location- Gujrat
6. Kalpakkan
operator- NPCL
Location- Tamil Nadu
7. Narora
operation- NPCIL
Location- Uttar Pradesh
Multiple choice chemistry nuclear physics nuclear reactor the nuclear power station isotopes and nuclear chemistry

What is the importance of moderator in a nuclear reactor?

  1. Moderator controls the flow of water inlet.

  2. Controls the nuclear fission by absorbing the excess neutrons.

  3. Controls the nuclear fission by slowing down the neutrons.

  4. None of these
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Controls the nuclear fission by slowing down the neutrons.


A moderator is a material used on a nuclear reactor to slow down the neutrons produced from fission. By slowing down neutrons the probability of a neutron interacting with Uranium-235 nuclei is greatly increased thereby maintaining the chain reaction. Carbon in the form of graphite is commonly used as a moderator.

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.