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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
What is the role of a moderator in a nuclear reactor?
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To slow down neutrons
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To absorb neutrons
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To reflect neutrons
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To control the rate of fission
A
Correct answer
Explanation
A moderator is a material used in a nuclear reactor to slow down neutrons, which increases the probability of their being absorbed by fuel nuclei and causing fission.
What is the role of a control rod in a nuclear reactor?
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To absorb neutrons
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To reflect neutrons
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To control the rate of fission
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To generate electricity
C
Correct answer
Explanation
Control rods are inserted into or withdrawn from the reactor core to control the rate of fission by absorbing neutrons.
What is the role of a coolant in a nuclear reactor?
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To remove heat from the reactor core
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To absorb neutrons
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To reflect neutrons
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To control the rate of fission
A
Correct answer
Explanation
A coolant is a fluid that is circulated through the reactor core to remove heat from the fuel and other components.
What is the role of a pressure vessel in a nuclear reactor?
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To contain the reactor core
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To absorb neutrons
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To reflect neutrons
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To control the rate of fission
A
Correct answer
Explanation
A pressure vessel is a large, thick-walled container that houses the reactor core and prevents the release of radioactive material into the environment.
What is the role of a containment building in a nuclear reactor?
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To contain the reactor core
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To absorb neutrons
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To reflect neutrons
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To protect the public from radiation
D
Correct answer
Explanation
A containment building is a structure that surrounds the reactor core and is designed to prevent the release of radioactive material into the environment in the event of an accident.
What is the role of a turbine in a nuclear reactor?
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To generate electricity
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To absorb neutrons
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To reflect neutrons
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To control the rate of fission
A
Correct answer
Explanation
A turbine is a device that converts the mechanical energy of a rotating shaft into electrical energy.
What is the role of a generator in a nuclear reactor?
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To generate electricity
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To absorb neutrons
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To reflect neutrons
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To control the rate of fission
A
Correct answer
Explanation
A generator is a device that converts mechanical energy into electrical energy.
What is the role of a condenser in a nuclear reactor?
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To remove heat from the steam
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To absorb neutrons
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To reflect neutrons
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To control the rate of fission
A
Correct answer
Explanation
A condenser is a device that removes heat from the steam produced by the reactor and converts it back into water.
What is the role of a feedwater pump in a nuclear reactor?
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To pump water into the reactor core
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To absorb neutrons
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To reflect neutrons
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To control the rate of fission
A
Correct answer
Explanation
A feedwater pump is a device that pumps water into the reactor core to replace the water that is converted into steam.
What is the role of a pressurizer in a nuclear reactor?
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To maintain the pressure in the reactor coolant system
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To absorb neutrons
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To reflect neutrons
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To control the rate of fission
A
Correct answer
Explanation
A pressurizer is a device that maintains the pressure in the reactor coolant system to prevent boiling.
What is the role of a containment spray system in a nuclear reactor?
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To remove heat from the containment atmosphere
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To absorb neutrons
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To reflect neutrons
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To control the rate of fission
A
Correct answer
Explanation
A containment spray system is a system that sprays water into the containment atmosphere to remove heat and reduce the pressure.
What is the role of an emergency core cooling system in a nuclear reactor?
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To provide cooling to the reactor core in the event of an accident
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To absorb neutrons
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To reflect neutrons
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To control the rate of fission
A
Correct answer
Explanation
An emergency core cooling system is a system that provides cooling to the reactor core in the event of an accident to prevent the core from overheating and melting.
What is the most common type of nuclear fuel used in nuclear power plants?
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Uranium-235
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Plutonium-239
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Thorium-232
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Cesium-137
A
Correct answer
Explanation
Uranium-235 is the most common type of nuclear fuel used in nuclear power plants because it is the only naturally occurring isotope of uranium that is fissile, meaning it can sustain a chain reaction.
What is the process by which nuclear fuel is converted into energy?
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Nuclear fission
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Nuclear fusion
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Radioactive decay
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Nuclear transmutation
A
Correct answer
Explanation
Nuclear fission is the process by which a heavy nucleus is split into two or more lighter nuclei, releasing a great amount of energy.
What is the process by which nuclear waste is converted into a more stable and less radioactive form?
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Reprocessing
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Vitrification
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Incineration
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Transmutation
B
Correct answer
Explanation
Vitrification is the process by which nuclear waste is converted into a stable glass form, which reduces its radioactivity and makes it easier to store and transport.