MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 657 Mcqs, each offering curated multiple-choice questions to sharpen your Testing Subject knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
If 4 gm of a radioisotope has a half life period of 10 days, the half life of 2 gm of the same isotope will be ____________ days? |
| A. | 5 |
| B. | 10 |
| C. | 20 |
| D. | 30 |
| Answer» C. 20 | |
| 2. |
Hydrogen has ______________ isotopes? |
| A. | No |
| B. | One |
| C. | Two |
| D. | Three |
| Answer» E. | |
| 3. |
Hydrogen differs from deuterium in _____________ properties? |
| A. | Radioactive |
| B. | Physical |
| C. | Chemical |
| D. | All A., B. and C. |
| Answer» C. Chemical | |
| 4. |
Hydrogen bomb employs the nuclear fusion of __________________ ? |
| A. | Hydrogen |
| B. | Deuterium |
| C. | Tritium |
| D. | Helium |
| Answer» C. Tritium | |
| 5. |
Heavy water used in the nuclear reactors to slow down the speed of neutrons is __________________? |
| A. | Highly purified water |
| B. | A compound of oxygen and deuterium |
| C. | Water having dissolved salts of heavy metals |
| D. | None of these |
| Answer» C. Water having dissolved salts of heavy metals | |
| 6. |
Heavy water is used as a moderator in a _____________________? |
| A. | Pressurised water reactor (PWR) |
| B. | Boiling water reactor (BWR) |
| C. | Candu reactor |
| D. | Molten sodium cooled reactor |
| Answer» D. Molten sodium cooled reactor | |
| 7. |
Heavy water is preferred over ordinary water as a coolant, because it? |
| A. | Acts both as an efficient coolant as well as a moderator |
| B. | Can be heated to a higher temperature without pressurizing |
| C. | Is less prone to radiation damage |
| D. | All A., B. and C. |
| Answer» E. | |
| 8. |
Heavy water has maximum density at ______________ °C ? |
| A. | 4 |
| B. | 11.6 |
| C. | 0 |
| D. | 18.6 |
| Answer» C. 0 | |
| 9. |
Heavy water (D2O) in a nuclear reactor serves as a_______________? |
| A. | Coolant |
| B. | Moderator |
| C. | Both A. & B. |
| D. | Neutron absorber |
| Answer» D. Neutron absorber | |
| 10. |
Heat is generated in a nuclear reactor (thermal) by_________________? |
| A. | Combustion of a nuclear fuel e.g. uranium |
| B. | Fusion of atoms of uranium |
| C. | Absorption of neutrons in uranium atoms |
| D. | Fission of U-235 by neutrons |
| Answer» E. | |
| 11. |
_____________ have the same mass number, but different nuclear charge ? |
| A. | Isotopes |
| B. | Isobars |
| C. | Isotones |
| D. | None of these |
| Answer» C. Isotones | |
| 12. |
H2 is a better coolant than CO2, due to it‟s relatively____________________? |
| A. | Lower density |
| B. | Higher specific heat |
| C. | Non-reactivity to uranium |
| D. | Lower neutron capture cross-section |
| Answer» C. Non-reactivity to uranium | |
| 13. |
Graphite is used in nuclear reactor as_____________________? |
| A. | Insulation lining of the reactor |
| B. | Fuel |
| C. | Lubricant |
| D. | Retarder of neutron velocity |
| Answer» E. | |
| 14. |
Gas cooling as compared to water cooling of nuclear reactors___________________? |
| A. | Cannot attain a high temperature |
| B. | Is more efficient as gas has a higher specific heat |
| C. | Can produce only saturated steam for feeding to power turbine |
| D. | None of these |
| Answer» E. | |
| 15. |
Fuel for a fast breeder reactor is_________________? |
| A. | Plutonium |
| B. | Uranium |
| C. | Radium |
| D. | Neptunium |
| Answer» B. Uranium | |
| 16. |
Fuel for a nuclear reactor (thermal) is___________________? |
| A. | Uranium |
| B. | Plutonium |
| C. | Radium |
| D. | None of these |
| Answer» B. Plutonium | |
| 17. |
First experimental observation of nuclear fission was done by ____________________? |
| A. | Plane |
| B. | Rutherford |
| C. | Fermi |
| D. | Hahn and Strassmann |
| Answer» D. Hahn and Strassmann | |
| 18. |
Final product of uranium extraction plant at Jadugoda (Bihar) is________________? |
| A. | Uranium |
| B. | Uranium oxide |
| C. | Uranium carbide |
| D. | Magnesium diuranate |
| Answer» E. | |
| 19. |
Fast breeder reactors do not____________________? |
| A. | Use Th-232 as fissile fuel |
| B. | Convert fertile material to fissile material |
| C. | Use fast neutrons for fission |
| D. | Use molten sodium as coolant |
| Answer» B. Convert fertile material to fissile material | |
| 20. |
Fast breeder reactors are most usable in India, because of our largest _____________ deposits? |
| A. | Thorium |
| B. | Plutonium |
| C. | Uranium |
| D. | None of these |
| Answer» B. Plutonium | |
| 21. |
Fast breeder nuclear reactors using enriched uranium as fuel may contain upto a maximum of ____________ percent of U-235 (i.e. fissile material)? |
| A. | 15 |
| B. | 45 |
| C. | 65 |
| D. | 85 |
| Answer» E. | |
| 22. |
Extraction of uranium from its ore is done using ______________ methods? |
| A. | Electrometallurgical |
| B. | Pyrometallurgical |
| C. | Chemical |
| D. | Physical beneficiation |
| Answer» D. Physical beneficiation | |
| 23. |
Extraction of uranium from its ore is done by ______________ method? |
| A. | Chemical |
| B. | Pyrometallurgical |
| C. | Physical beneficiation |
| D. | Electrometallurgical |
| Answer» B. Pyrometallurgical | |
| 24. |
Enrichment of uranium is done to increase the concentration of ______________ in the natural uranium? |
| A. | U-238 |
| B. | U-233 |
| C. | U-235 |
| D. | Pu-239 |
| Answer» D. Pu-239 | |
| 25. |
Enriched uranium means that, it contains___________________? |
| A. | More than 0.71% of U-235 |
| B. | Only fertile material |
| C. | Only fissile material |
| D. | No impurities |
| Answer» B. Only fertile material | |
| 26. |
Energy produced in the nuclear fission is of the order of _____________ MeV? |
| A. | 20 |
| B. | 200 |
| C. | 1000 |
| D. | 2000 |
| Answer» C. 1000 | |
| 27. |
Energy equivalent to one atomic mass unit (amu) is ______________ MeV? |
| A. | 9.31 |
| B. | 93.1 |
| C. | 931 |
| D. | 9310 |
| Answer» D. 9310 | |
| 28. |
Emission of β-particles during radioactive decay of a substance is from__________________? |
| A. | Innermost shell |
| B. | Nucleus |
| C. | Outermost shell |
| D. | None of these |
| Answer» C. Outermost shell | |
| 29. |
Critical energy should be _______________ the neutron binding energy of the atom in order to initiate a nuclear fission? |
| A. | Equal to |
| B. | Less than |
| C. | More than |
| D. | Either more or less |
| Answer» D. Either more or less | |
| 30. |
“Critical mass” is the minimum mass of nuclear fissile material required for the_______________________? |
| A. | Sustainment of chain reaction |
| B. | Power generation on commercial scale |
| C. | Economic power generation |
| D. | None of these |
| Answer» B. Power generation on commercial scale | |
| 31. |
“Critical mass” is the minimum mass of nuclear fissile material required for the__________________? |
| A. | Sustainment of chain reaction |
| B. | Power generation on commercial scale |
| C. | Economic power generation |
| D. | None of these |
| Answer» B. Power generation on commercial scale | |
| 32. |
Coolant used in a fast breeder reactor is____________________? |
| A. | Molten sodium |
| B. | Heavy water |
| C. | Ordinary water |
| D. | Helium |
| Answer» B. Heavy water | |
| 33. |
Coolant used in a boiling water reactor is________________? |
| A. | Hydrogen gas |
| B. | Water |
| C. | Steam |
| D. | A mixture of water & steam |
| Answer» E. | |
| 34. |
Commercial power generation from fusion reactor is not yet possible, because___________________? |
| A. | It is difficult to control nuclear fusion reaction |
| B. | The fuel required (i.e., deuterium & tritium) is scarce |
| C. | It is difficult to initiate fusion reaction |
| D. | Quantity of fuel required for initiating fusion reaction is prohibitively high |
| Answer» B. The fuel required (i.e., deuterium & tritium) is scarce | |
| 35. |
Commercial power generation from fusion reactor is not yet possible, because_____________________? |
| A. | It is difficult to control fusion reaction |
| B. | The fuel required (e.g. deuterium and tritium) is scarce |
| C. | It is difficult to initiate fusion reaction |
| D. | Quantity of fuel required for initiating fusion reaction is prohibitively high |
| Answer» B. The fuel required (e.g. deuterium and tritium) is scarce | |
| 36. |
Candu reactor is a ______________ nuclear reactor? |
| A. | Natural uranium fuelled heavy water cooled & moderated |
| B. | Highly enriched uranium (85% U-235) fuelled |
| C. | Homogeneous |
| D. | Fast breeder |
| Answer» B. Highly enriched uranium (85% U-235) fuelled | |
| 37. |
Both tritium and deuterium have the same number of_______________? |
| A. | Neutrons |
| B. | Electrons |
| C. | Protons |
| D. | Nucleons |
| Answer» B. Electrons | |
| 38. |
Biological shield is provided in a nuclear power reactor to protect the ______________ from radiation damage? |
| A. | Fuel elements |
| B. | Operating personnels |
| C. | Walls of the reactor |
| D. | None of these |
| Answer» C. Walls of the reactor | |
| 39. |
Atoms with same number of neutrons, but different number of nucleons are called___________________? |
| A. | Isotones |
| B. | Isobars |
| C. | Isotopes |
| D. | Isostere |
| Answer» B. Isobars | |
| 40. |
Atoms of U-238 and U-235 differ in structure by three_____________________? |
| A. | Electrons and three protons |
| B. | Protons |
| C. | Neutrons |
| D. | Electrons |
| Answer» D. Electrons | |
| 41. |
Artificially produced radioactive isotopes are used for____________________? |
| A. | Power generation |
| B. | Treatment of certain diseases |
| C. | Initiating nuclear fission and fusion |
| D. | All A., B. and C. |
| Answer» C. Initiating nuclear fission and fusion | |
| 42. |
An ideal coolant for a nuclear reactor should ________________? |
| A. | Be a good absorber of neutrons |
| B. | Be capable of attaining high temperature, only when it is pressurised |
| C. | Have high density, but low heat transfer co-efficient |
| D. | Be free from radiation damage and non-corrosive |
| Answer» E. | |
| 43. |
An element having large number of ______________ is most easily subjected to nuclear fission? |
| A. | Protons |
| B. | Electrons |
| C. | Neutrons |
| D. | Nucleons |
| Answer» E. | |
| 44. |
An electron has a mass that is approximately ____________ that of the proton? |
| A. | 1836 (approximately) |
| B. | 1/1836 (approximately) |
| C. | 1 |
| D. | ∞ |
| Answer» C. 1 | |
| 45. |
Absorption/scattering cross-section of an element is expressed in “barn”, which is equivalent to___________________? |
| A. | 10-24 cm2 |
| B. | 10-12 cm |
| C. | 1 Angstrom |
| D. | 10-24 cm |
| Answer» B. 10-12 cm | |
| 46. |
A thermal nuclear reactor compared to a fast breeder reactor ? |
| A. | Uses slower neutrons for fission |
| B. | Uses faster neutrons for fission |
| C. | Gives higher power density |
| D. | Requires less fuel to run at the same power level |
| Answer» B. Uses faster neutrons for fission | |
| 47. |
A radioactive substance does not emit________________? |
| A. | α-ray |
| B. | Proton |
| C. | Position |
| D. | β-ray |
| Answer» C. Position | |
| 48. |
A radioactive isotope undergoes decay with respect to time following _____________ law? |
| A. | Logarithmic |
| B. | Exponential |
| C. | Linear |
| D. | Inverse square |
| Answer» C. Linear | |
| 49. |
A pressurised water reactor (PWR) uses pressurised water as a___________________? |
| A. | Coolant |
| B. | Working fluid in power turbine |
| C. | Moderator |
| D. | None of these |
| Answer» B. Working fluid in power turbine | |
| 50. |
A nuclear reactor can’t be used for_________________? |
| A. | The production of radioisotopes |
| B. | Supplying intense fields or beams of neutron for scientific experiments |
| C. | Marine ship propulsion |
| D. | None of these |
| Answer» E. | |