Physics · Science General

Nuclear Physics and Energy

1,296 Questions

Access a comprehensive set of questions on nuclear physics, reactor mechanisms, and atomic energy. Topics include nuclear fission, plasma generation, and radiation control. These physics questions form a core part of the syllabus for various engineering and civil service exams.

Nuclear reactor componentsAtomic energy generationPlasma reactorsNuclear fusionRadiation control

Nuclear Physics and Energy Questions

Multiple choice

The conditions under which nuclear fusion takes place are

  1. high temperature and low pressure

  2. low pressure and low temperature

  3. low temperature and high pressure

  4. high pressure and high temperature
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Fusion requires temperature about 100 million Kelvin. Pressure squeezes the hydrogen atoms. They must be within 1 x 10-15 metres of each other to fuse. 

Multiple choice

The Function of heavy water in a nuclear reactor is to

  1. Slow down the speed of neutrons.

  2. Increase the speed of neutrons.

  3. Coll down the reactor.

  4. Stop the nucleus reaction.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The reaction can be controlled by using neutron poisons, which absorb excess neutrons such as boron and cadmium rods and neutron moderators, which reduce the velocity of fast neutrons.  Commonly used moderators include regular (light) water (75% of the world\'s reactors), solid graphite (20% of reactors) and heavy water (5% of reactors). Beryllium has also been used in some experimental types, and hydrocarbons have been suggested as another possibility.

Multiple choice

Which of the following reactors does not load follow?

  1. Gas turbine power plants

  2. Hydroelectric power plants

  3. Boiling water reactors

  4. Pressurized water reactors
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

These reactors use a chemical shim in the moderator to control power level, and so normally do not load follow.

Multiple choice

A neutron-absorbing material is used for making

  1. control rods

  2. moderator

  3. containment

  4. pressure vessel
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

These are made with neutron-absorbing materials such as cadmium, hafnium or boron, and are inserted or withdrawn from the core to control the rate of reaction or to halt it.

Multiple choice

In Illinois, there is a nuclear power plant on a _____

  1. fault line

  2. Native American burial ground

  3. radioactive waste dump site

  4. Large Hadron Collider (LHC)
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The Clinton Power Station in Illinois is famously located near a fault line, which required specific engineering considerations during its construction.

Multiple choice chemistry nuclear physics hazards and safety measures of radiations harmful effects and safety precautions for radiations energy production

Fill in the blank.
__________ arises from the 'burning' of uranium fuel in a nuclear reactor. 

  1. Low-level- waste

  2. High-level waste

  3. Intermediate level waste

  4. Very low level waste
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

High level waste 

High level radioactive waste are highly radioactive materials produced as a by product of the nuclear reactions that occurs inside the nuclear reactor. 

Multiple choice chemistry nuclear physics hazards and safety measures of radiations harmful effects and safety precautions for radiations energy production

Spent fuel rods and obsolete nuclear weapons are examples of 

  1. decommissioned waste

  2. high-level nuclear waste

  3. low-level nuclear waste

  4. recycled nuclear waste

  5. itinerant nuclear waste
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

High level nuclear waste 

High level radioactive waste are the highly radioactive materials that produced as a byproduct of the reactions that occur inside nuclear reactor. Spent fuel and obsolete nuclear weapons are example of high lever nuclear waste. 

Multiple choice chemistry nuclear physics hazards and safety measures of radiations harmful effects and safety precautions for radiations energy production

The various types of nuclear reactors that have been constructed to furnish heat for the production of steam differ from each other in what ways? 

  1. In what kind of moderator is used

  2. How the reactor core is cooled

  3. How the heat energy is used to generate steam

  4. They can differ in all of the above ways
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

They can differ in all the above ways 

A nuclear reactor can be classified depends on the moderator used, reactor core cooling method, use of heat energy and many more. 

Multiple choice chemistry nuclear physics hazards and safety measures of radiations harmful effects and safety precautions for radiations energy production

Which of the following hazards is not associated with a liquid metal breeder reactor (LMFBR)?

  1. little fissionable material is formed

  2. a sodium explosion occurs if it comes in contact with water

  3. the plutonium by-product can be made into nuclear weapons and, therefore, poses a security risk

  4. all of the above are hazards associated with the LMFBR
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A

Liquid Metal Fast brecedes reactor (LMFBR) is a nuclear reactor capable of producing more fissile product than it takes in. 

Multiple choice evs how to save fuel lpg, cng treasures from the earth fuel and conservation

Nuclear fuel among the following is:

  1. uranium

  2. plutonium

  3. both A & B

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

Nuclear fuel is the one which store their energy in the form of nuclear energy and whose nuclei are unstable and undergoes fission.Uranium and plutonium are examples of nuclear fuel.

Multiple choice gamma decay change in nucleus due to radioactive decay alpha, beta and gamma particles (rays) and their properties

A source of energy of 100 W is producing energy by fission of 1 Kg $U^{235}$. How long it can kept generation of energy :- 

  1. $2.5 \times 10^4 yr$
  2. $10^6 s$
  3. $8.6 \times 10^7 s$
  4. $100 yr$
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Total energy available from 1 kg of U-235 (approx 200 MeV per fission) is calculated. Dividing this total energy by the power (100 W = 100 J/s) gives the time in seconds, which is then converted to years.

Multiple choice political science indian foreign policy india's foreign policy foreign policy of india and india's relations with the neighbouring countries foreign relations

What are the three pillars of the NPT?

  1. Disarmament, nonproliferation, and peaceful uses of nuclear technology

  2. Nuclear-weapon-free zones, nuclear power, and regional stability

  3. Strategic bombers, ICBMs, and SLBMs

  4. Nuclear, chemical, and biological weapons
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

  • The Non-Proliferation Treaty or NPT has three pillars :  

  1. Nuclear Disarmament: Includes disarmament and dismantling military nuclear programs.
  2. Non-proliferation: Non nuclear weapon states agree to avoid developing nuclear technology while NWS agree not to spread the technology.
  3. Peaceful Uses Of Nuclear Technology : Using nuclear energy for peaceful purposes and not for war and its nuances.