MCQOPTIONS
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MCQOPTIONS
This section includes 87 Mcqs, each offering curated multiple-choice questions to sharpen your Mechanical Engineering Questions knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Which of the following type of pump is used in liquid metal cooled reactor for circulation of liquid metal_________________? |
| A. | centrifugal |
| B. | axial |
| C. | reciprocation |
| D. | electromagnetic |
| E. | diaphragm |
| Answer» E. diaphragm | |
| 2. |
Which of the following particles is the lightest__________________? |
| A. | nucleus |
| B. | electron |
| C. | proton |
| D. | meson |
| E. | neutron |
| Answer» C. proton | |
| 3. |
Which of the following nuclear reactor does not need a heat exchanger for generation of steam____________________? |
| A. | gas cooled |
| B. | liquid metal cooled |
| C. | pressurised water |
| D. | boiling water |
| E. | none of the above |
| Answer» E. none of the above | |
| 4. |
Which of the following is the primary fuel________________? |
| A. | Ulii |
| B. | U |
| C. | U238 |
| D. | Pu: |
| E. | Pu |
| Answer» C. U238 | |
| 5. |
Which of the following is the heaviest________________? |
| A. | neutron |
| B. | proton |
| C. | atom |
| D. | electron |
| E. | nucleus |
| Answer» D. electron | |
| 6. |
Which of the following is secondary fuel ? |
| A. | Th232andU238 |
| B. | U233andPu239 |
| C. | U233andPu238 |
| D. | non of these |
| Answer» D. non of these | |
| 7. |
Which of the following is more appropriate for a moderator. One which_________________? |
| A. | does not absorb neutrons |
| B. | absorbs neutrons |
| C. | accelerates neutrons |
| D. | eats up neutrons |
| E. | regenerates neutrons |
| Answer» B. absorbs neutrons | |
| 8. |
Which of the following can be used as a coolant in nuclear plant________________? |
| A. | light or heavy water |
| B. | molten lead |
| C. | carbon dioxide |
| D. | freon |
| E. | carbon tetrachloride |
| Answer» B. molten lead | |
| 9. |
Which of the following are ferrite materials__________________? |
| A. | U233andPu239 |
| B. | U |
| C. | U238andPu239 |
| D. | U238andTh239 |
| E. | none of the above |
| Answer» C. U238andPu239 | |
| 10. |
Which is not identical for an atom and an isotope_________________? |
| A. | mass number |
| B. | atomic number |
| C. | chemical properties |
| D. | position in periodic table |
| E. | all of the above |
| Answer» B. atomic number | |
| 11. |
When a reactor becomes critical, then the production of neutrons is_________________? |
| A. | infinite |
| B. | zero |
| C. | exactly balanced by the loss of neutrons through leakage |
| D. | initiated |
| E. | stopped |
| Answer» D. initiated | |
| 12. |
Uranium-233 is produced__________________? |
| A. | as basic raw material |
| B. | by neutron irradiation of Uz |
| C. | by neutron irradiation of thorium |
| D. | artificially |
| E. | in high capacity furnaces |
| Answer» D. artificially | |
| 13. |
U238 will undergo fission by_________________? |
| A. | high energy (fast) neutrons alone |
| B. | low energy (slow) neutrons alone |
| C. | either fast or slow neutrons |
| D. | medium energy neutrons |
| E. | none of the above |
| Answer» B. low energy (slow) neutrons alone | |
| 14. |
U235 will undergo fission by__________________? |
| A. | high energy (fast) neutrons alone |
| B. | low energy (slow) neutrons alone |
| C. | either fast or slow neutrons |
| D. | medium energy neutrons |
| E. | none of the above |
| Answer» D. medium energy neutrons | |
| 15. |
The unit of radio-activity is_____________? |
| A. | electron-volt |
| B. | electron-ampere |
| C. | curie |
| D. | MeV |
| E. | AMU |
| Answer» D. MeV | |
| 16. |
The total energy released in fission of U is__________________? |
| A. | 5 MeV |
| B. | 10 MeV |
| C. | 199 MeV |
| D. | 168 MeV |
| E. | 11 MeV |
| Answer» D. 168 MeV | |
| 17. |
The size of the reactor is said to be critical when_________________? |
| A. | chain reaction can be initiated |
| B. | it becomes uncontrollable |
| C. | it explodes |
| D. | it produces no power |
| E. | it produces tremendous power |
| Answer» B. it becomes uncontrollable | |
| 18. |
The risk of radioactive hazard is greatest in the turbine with following reactor___________________? |
| A. | pressurised water |
| B. | boiling water |
| C. | gas cooled |
| D. | liquid metal cooled |
| E. | all of the above |
| Answer» C. gas cooled | |
| 19. |
The process by which a heavy nucleus is splitted into two light nuclei is known as_________________? |
| A. | splitting |
| B. | fission |
| C. | fusion |
| D. | disintegration |
| E. | chain reaction |
| Answer» C. fusion | |
| 20. |
The presence of reflector in nuclear power plants results in___________________? |
| A. | increased production of neutrons |
| B. | complete absorption of neutrons |
| C. | controlled production of neutrons |
| D. | decreased leakage of neutrons |
| E. | decrease of speed of neutrons |
| Answer» E. decrease of speed of neutrons | |
| 21. |
The number of isotopes of hydrogen are _________________? |
| A. | 1 |
| B. | 2 |
| C. | U |
| D. | 3 |
| E. | 0 |
| Answer» E. 0 | |
| 22. |
The nuclear power plant at Tarapur has the following reactor________________? |
| A. | fast breeder |
| B. | pressurised water |
| C. | boiling water |
| D. | sodium graphite |
| E. | none of the above |
| Answer» D. sodium graphite | |
| 23. |
The nuclear energy is measured as__________________? |
| A. | MeV |
| B. | curie |
| C. | farads |
| D. | MW |
| E. | kWhr |
| Answer» B. curie | |
| 24. |
The most practical fuel for a thermo-nuclear reactor, both from econocical and nuclear consideration is____________________? |
| A. | plutonium |
| B. | uranium |
| C. | deuterium |
| D. | thorium |
| E. | lithium |
| Answer» D. thorium | |
| 25. |
The most commonly used moderator in nuclear plants is___________________? |
| A. | heavy water |
| B. | concrete and bricks |
| C. | graphite and concrete |
| D. | deutrium |
| E. | graphite |
| Answer» F. | |
| 26. |
The mass number of a substance represents the sum of total number of___________________? |
| A. | protons and neutrons in an atom |
| B. | protons and electrons in an atom |
| C. | neutrons and electrons in an atom |
| D. | protons and neutrons in a nucleus |
| E. | protons and electrons in a nucleus |
| Answer» E. protons and electrons in a nucleus | |
| 27. |
The main interest of shielding in nuclear reactor is protection against_______________? |
| A. | X-rays |
| B. | infra-red rays |
| C. | a, P, and y rays |
| D. | neutrons and gamma rays |
| E. | electrons |
| Answer» E. electrons | |
| 28. |
The function of control rods in nuclear plants is to__________________? |
| A. | control temperature |
| B. | control readioactive pollution |
| C. | control absorption of neutron |
| D. | control fuel consumption |
| E. | none of the above |
| Answer» D. control fuel consumption | |
| 29. |
The fuel needed, with reflector in nuclear power plant, in order to generate sufficient neutrons to sustain a chain reaction, would be________________? |
| A. | more |
| B. | less |
| C. | same |
| D. | zero |
| E. | negative, i.e. fuel would be generated |
| Answer» C. same | |
| 30. |
The following present serious difficulty in designing reactor shield_________________? |
| A. | alpha particles |
| B. | beta particles |
| C. | thermal neutrons |
| D. | fast neutrons and gamma rays |
| E. | none of the above |
| Answer» E. none of the above | |
| 31. |
The first unclear power plant in India is located at____________________? |
| A. | Kota |
| B. | Kalapakkam |
| C. | Tarapur |
| D. | Baraeilly |
| E. | Kerala |
| Answer» D. Baraeilly | |
| 32. |
The fast breeder reactor uses the following moderator__________________? |
| A. | demineralised water |
| B. | carbon dioxide |
| C. | heavy water |
| D. | graphite |
| E. | no moderator is used |
| Answer» F. | |
| 33. |
The energy required to be applied to a radioactive nucleus for the emission of a neutron is________________? |
| A. | 1 MeV |
| B. | 2.4 MeV |
| C. | 4.3 MeV |
| D. | 7.8 MeV |
| E. | 20 MeV |
| Answer» E. 20 MeV | |
| 34. |
The energy produced by a thermal reactor of same size as a breeder reactor is__________________? |
| A. | almost same |
| B. | slightly more |
| C. | slightly less |
| D. | much less |
| E. | much more |
| Answer» E. much more | |
| 35. |
The efficiency of a nuclear power plant in comparsion to a conventional thermal power plant is________________? |
| A. | same |
| B. | more |
| C. | less |
| D. | may be less or mote depending on size |
| E. | unpredictable |
| Answer» D. may be less or mote depending on size | |
| 36. |
The efficiency of a nuclear power plant in comparison to conventional and nuclear consideration is__________________? |
| A. | higher cost of nuclear fuel |
| B. | high initial cost |
| C. | high heat rejection in condenser |
| D. | lower temperature and pressure condi-tions |
| E. | nuclear hazard risk |
| Answer» E. nuclear hazard risk | |
| 37. |
The coolant used in boiling water reactor is________________? |
| A. | Co2 |
| B. | pressurised water |
| C. | mixture of water and steam |
| D. | liquid metal |
| E. | mercury |
| Answer» D. liquid metal | |
| 38. |
The commonly used material for shielding is__________________? |
| A. | lead or concrete |
| B. | lead and tin |
| C. | graphite or cadmium |
| D. | thick galvanised sheets |
| E. | black carbon papers |
| Answer» B. lead and tin | |
| 39. |
The breeding gain in case of thermal breeder reactor as compared to fast breeder reactor is________________? |
| A. | same |
| B. | lower |
| C. | higher |
| D. | unity |
| E. | higher/lower depending on the size of reactor |
| Answer» C. higher | |
| 40. |
Reflector in nuclear plants is used to________________? |
| A. | return the neutrons back into the core |
| B. | shield the radioactivity completely |
| C. | check polllution |
| D. | conserve energy |
| E. | is not used |
| Answer» B. shield the radioactivity completely | |
| 41. |
Reactors for propulsion applications use_________________? |
| A. | natural uranium |
| B. | molten lead |
| C. | any form of uranium |
| D. | thorium |
| E. | plutonium |
| Answer» C. any form of uranium | |
| 42. |
Reactors designed for propulsion applications are designed for_______________? |
| A. | natural uranium |
| B. | enriched uranium |
| C. | pure uranium |
| D. | any type of uranium |
| E. | none of the above |
| Answer» C. pure uranium | |
| 43. |
Pressurised water reactor is designed________________? |
| A. | for boiling pi water in the core |
| B. | to use liquid sodium metal as coolant |
| C. | to use intermediate coolant |
| D. | to prevent the water coolant from boiling in the core |
| E. | to eliminate the coolant loop of the pressurised water |
| Answer» E. to eliminate the coolant loop of the pressurised water | |
| 44. |
Plutonium is produced________________? |
| A. | as basic raw material |
| B. | by neutron irradiation of Uz |
| C. | by neutron irradiation of throium |
| D. | artificially |
| E. | in high capacity furnace |
| Answer» C. by neutron irradiation of throium | |
| 45. |
Plutonium-239 is produced__________________? |
| A. | as basic raw material |
| B. | by neutron irradiation of IT |
| C. | by neutron irradiation of thorium |
| D. | artificially |
| E. | in high capacity furnaces |
| Answer» C. by neutron irradiation of thorium | |
| 46. |
Pick up the wrong statement Fast breeder reactors__________________? |
| A. | operate at extremely high power densities |
| B. | are liquid-metal cooled |
| C. | produce more fuel than they consume |
| D. | are unmoderated |
| E. | use water as coolant |
| Answer» F. | |
| 47. |
One gram of uranium will produce energy equivalent to approximately____________________? |
| A. | 1 tonne of high grade coal |
| B. | 4.5 tonnes of high grade coal |
| C. | 10 tonnes of high grade coal |
| D. | 100 tonnes of high grade coal |
| E. | 1000 tonnes of high grade coal |
| Answer» C. 10 tonnes of high grade coal | |
| 48. |
Natural uranium is made up of__________________? |
| A. | 99.282% U238, 0.712% U235, 0.006% U234 |
| B. | 99.282% U235, 0.712% U238, 0.06%’ U234 |
| C. | 99.282% U234, 0.712% U238, 0.006% U235 |
| D. | 99.282% U235, 0.712% U234, 0.006% U238 |
| E. | none of the above |
| Answer» B. 99.282% U235, 0.712% U238, 0.06%’ U234 | |
| 49. |
Moderator in nuclear plants is used to__________________? |
| A. | reduce temperature |
| B. | extract heat from nuclear reaction |
| C. | control the reaction |
| D. | cause collision with the fast moving neutrons to reduce their speed |
| E. | moderate the radioactive pollution |
| Answer» E. moderate the radioactive pollution | |
| 50. |
Isotopes of same elements have___________________? |
| A. | same atomic number and different masses |
| B. | same chemical properties but different atomic numbers |
| C. | different masses and different atomic numbers |
| D. | different chemical properties and same atomic numbers |
| E. | same chemical properties and same atomic numbers |
| Answer» C. different masses and different atomic numbers | |