A. U-235
B. U-238
C. U-239
D. Pu-239
Correct Answer: U-239 ✔
Last Updated: March 07, 2019
Related MCQs
- 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 ?
- The ratio of atomic radius to its nuclear radius is about__________?
- Isotopes of an element have different__________?
- A moderator __________ the neutrons?
- The atomic number of a radioactive element is not changed, when it emits __________ rays?
- Extraction of uranium from its ore is done by __________ method?
- The most abundant isotope of natural uranium is __________?
- A boiling water reactor is the one, in which the__________?
- Heavy water (D2O) in a nuclear reactor serves as a__________?
- The sum of masses of two nuclei produced in nuclear fission compared to the mass of original nucleus is__________?
- In a nuclear explosion, the energy is released primarily in the form of __________ energy?
- What is the average life of a radioactive atom having a ‘half life period’ of T ?
- In a pressurised water reactor (PWR), the__________?
- A fertile material is the one, which can be__________?
- In a homogeneous nuclear reactor, the __________ are mixed together?
- Heat is generated in a nuclear reactor (thermal) by__________?
- Molten sodium is used as a coolant in a fast breeder reactor, because of its__________?
- A homogeneous reactor is the one, in which the__________?
- The number of neutrons in the nucleus of Uranium-233 (92U233) is __________?
- Mass of a positron is same as that of a/an__________?
- The amount of a radioactive material (having a half life of 100 years) remaining after 400 years will be __________ of its original weight?
- An element having large number of __________ is most easily subjected to nuclear fission?
- One ‘amu’ is equivalent to__________?
- 75% of a radioactive element decays in 6 hours. Its half life period is __________ hours?
- Which of the following is not used as a nuclear fuel cladding material ?
- The radioisotope used to study the thyroid gland is__________?
- Sodium melts (at atmospheric pressure) at a temperature of __________ °C?
- A thermal nuclear reactor compared to a fast breeder reactor ?
- __________ nuclear reactor does not require a heat exchanger to supply steam to power turbine?
- Which of the following radiations is the least penetrating ?
- Moderating material used in a thermal-reactor should be a __________?
- Atoms of U-238 and U-235 differ in structure by three__________?
- Nuclear fuel usually used in a Boiling Water Reactor (BWR) is__________?
- __________ moderator is used in a fast breeder reactor?
- Velocity of the thermal neutron (< 0.025 eV) used for fission of U-235 is around __________ m/sec?
- A fast breeder reactor__________?
- Commercial power generation from fusion reactor is not yet possible, because__________?
- The main ore of uranium is __________?
- Pressure in a Pressurised Water Reactor (PWR) is used for __________?