A. Fuel elements
B. Operating personnels
C. Walls of the reactor
D. None of these
Correct Answer: Operating personnels ✔
Last Updated: March 07, 2019
Related MCQs
- H2 is a better coolant than CO2, due to it‟s relatively__________?
- Which of the following accounts for the maximum energy release in the nuclear fission process ?
- The ratio of mass of a neutron to that of an electron is about 1839. What is the ratio of the mass of a proton to that of an electron?
- In the gaseous diffusion process of uranium enrichment, the natural uranium is converted into gaseous __________?
- Enrichment of uranium is done to increase the concentration of __________ in the natural uranium?
- A pressurised water reactor (PWR) uses pressurised water as a__________?
- Critical energy should be __________ the neutron binding energy of the atom in order to initiate a nuclear fission?
- Hydrogen has __________ isotopes?
- Which of the following is not used as a moderator in nuclear reactor ?
- Which is not a fissile nuclear material ?
- Fast breeder reactors are most usable in India, because of our largest __________ deposits?
- An electron has a mass that is approximately __________ that of the proton?
- Which of the following reactors is operated at high neutron flux and low power level ?
- Absorption/scattering cross-section of an element is expressed in “barn”, which is equivalent to__________?
- Isotopes of an element have different__________?
- Thorium metal__________?
- Which of the following isotopes is not present in natural uranium?
- U-235 content in enriched uranium, that is normally used in power reactors (e.g., at Tarapur atomic power plant), is about __________ percent?
- Thorium-232 is converted into uranium-233 in a/an __________ nuclear reactor?
- Nuclides having the same atomic numbers are termed as__________?
- The size of an atom is of the order of one __________?
- The atomic mass of an element is fractional, because __________?
- “Critical mass” is the minimum mass of nuclear fissile material required for the__________?
- The atomic number of an element is equal to the number of __________ present in its atom?
- Radioactive decay is a __________ change?
- The mass number of an element is equal to the number of __________ in the nucleus?
- __________ have the same mass number, but different nuclear charge ?
- Energy produced in the nuclear fission is of the order of __________ MeV?
- Which is the most commonly used molten metal for cooling of nuclear reactors ?
- Percentage of the heavy water in ordinary water is around __________?
- The 92U238 emits an a-particle. The product is__________?
- Coolant used in a boiling water reactor is__________?
- The ratio of neutrons to protons of an element having a mass number and atomic number of 80 and 40 respectively is __________?
- A radioactive substance does not emit__________?
- Thermal shield is used in high powered nuclear reactors to__________?
- Commercial power generation from fusion reactor is not yet possible, because__________?
- Molten sodium (as a coolant in fast breeder reactor) ?
- Out of the following, nucleus of __________ atom contains the largest number of neutrons?
- The amount of a radioisotope remaining undecayed after a time equal to four times its half life, will be __________ percent?
- Nuclear reactors are provided with shield to guard against the emission of mainly __________ rays?
- Which of the following is a moderating material used in nuclear reactor ?
- Uranium percentage in monazite sand is about__________?
- The main ore of thorium is__________?
- Fuel for a fast breeder reactor is__________?
- Fast breeder reactors do not__________?
- Quantity of fissionable material (i.e. U-235) in natural uranium is __________ percent?
- Extraction of uranium from its ore is done using __________ methods?
- The velocity of thermal (slow) neutrons triggering nuclear fission reaction (having energy equal to 0.025 eV) is about __________ metres/second?
- Unit of radioactivity is__________?
- Gas cooling as compared to water cooling of nuclear reactors__________?
- Which of the following nuclear materials is fissile ?