MCQOPTIONS
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MCQOPTIONS
This section includes 486 Mcqs, each offering curated multiple-choice questions to sharpen your Chemical Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 151. |
_ The disintegration rate of a radioactive element$? |
| A. | Progressively increases |
| B. | Progressively decreases |
| C. | Remains constant throughout |
| D. | May increase or decrease depending on the material |
| Answer» C. Remains constant throughout | |
| 152. |
_ Atoms with same number of neutrons, but different number of nucleons are called$? |
| A. | Isotones |
| B. | Isobars |
| C. | Isotopes |
| D. | Isoters |
| Answer» B. Isobars | |
| 153. |
_ Extraction of uranium from its ore is done by __________ method.$? |
| A. | Chemical |
| B. | Pyrometallurgical |
| C. | Physical beneficiation |
| D. | Electrometallurgical |
| Answer» B. Pyrometallurgical | |
| 154. |
_ Uranium is recovered from its ore (pitchblende) by$? |
| A. | Froth floatation technique |
| B. | Leaching with sulphuric acid |
| C. | Smelting in a furnace |
| D. | Dissolving in water |
| Answer» C. Smelting in a furnace | |
| 155. |
_ Radioactive decay is a __________ change.$? |
| A. | Chemical |
| B. | Nuclear |
| C. | Physical |
| D. | None of these |
| Answer» C. Physical | |
| 156. |
_ The phenomenon of radioactivity was discovered by$? |
| A. | Madam Curie |
| B. | Bacquerrel |
| C. | Roentgen |
| D. | J.J. Thomson |
| Answer» C. Roentgen | |
| 157. |
_ β-rays emission in radioactive disintegration is always accompanied by the emission of$? |
| A. | γ-rays |
| B. | α-rays |
| C. | Neutrons |
| D. | None of these |
| Answer» B. ≈í¬±-rays | |
| 158. |
_ Thermal neutrons which are used to cause the fission of U-235 have energy __________ eV.$? |
| A. | < 0.025 |
| B. | > 1 |
| C. | 1-25 |
| D. | > 200 |
| Answer» B. > 1 | |
| 159. |
_ In nuclear reactions, __________ number is conserved.$? |
| A. | Mass |
| B. | Atomic |
| C. | Both A & B |
| D. | Neither A nor B |
| Answer» D. Neither A nor B | |
| 160. |
_ Ordinary water is not used as a moderator because, it$? |
| A. | Has a low absorption cross-section |
| B. | Has a low scattering cross-section |
| C. | Absorbs neutrons |
| D. | Does not absorb neutrons |
| Answer» D. Does not absorb neutrons | |
| 161. |
_ Which of the following reactors is operated at high neutron flux and low power level?$? |
| A. | Breeder reactor |
| B. | Research reactor |
| C. | Heterogeneous reactor |
| D. | Liquid metal (e.g., molten sodium) cooled reactor |
| Answer» C. Heterogeneous reactor | |
| 162. |
_ Which of the following is a moderating material used in nuclear reactor?$? |
| A. | Graphite |
| B. | Cadmium |
| C. | Zircalloy (an alloy of zirconium and aluminium) |
| D. | Stainless steel |
| Answer» B. Cadmium | |
| 163. |
_ An ideal coolant for a nuclear reactor should$? |
| A. | Be a good absorber of neutrons |
| B. | Be capable of attaining high temperature, only when it is pressurised |
| C. | Have high density, but low heat transfer co-efficient |
| D. | Be free from radiation damage and non-corrosive |
| Answer» E. | |
| 164. |
_ Uranium Corporation of India Limited (UCIL) engaged in the mining & concentration of uranium ore is located at$? |
| A. | Alwaye (in Kerala) |
| B. | Jadugoda (in Jharkhand) |
| C. | Kalpakkam (in Tamilnadu) |
| D. | Gopalpur coast (in Orissa) |
| Answer» C. Kalpakkam (in Tamilnadu) | |
| 165. |
_ __________ nuclear reactor does not require a heat exchanger to supply steam to power turbine.$? |
| A. | Molten sodium cooled |
| B. | Helium cooled |
| C. | Boiling water |
| D. | Pressurised water |
| Answer» D. Pressurised water | |
| 166. |
_ In the gaseous diffusion process of uranium enrichment, the natural uranium is converted into gaseous$? |
| A. | Uranium oxide |
| B. | Uranium hexaflouride |
| C. | Uranium carbide |
| D. | Uranium sulphate |
| Answer» C. Uranium carbide | |
| 167. |
_ The half life period of a radioactive element depends on its$? |
| A. | Temperature |
| B. | Pressure |
| C. | Amount |
| D. | None of these |
| Answer» E. | |
| 168. |
_ Which of the following factors is the most important in the site selection for a nuclear power plant?$? |
| A. | Absence of earthquake prone zone in nearby areas |
| B. | Abundant availability of water |
| C. | Remotely located from residential areas |
| D. | Proximity to fuel source |
| Answer» B. Abundant availability of water | |
| 169. |
_ If 4 gm of a radioisotope has a half life period of 10 days, the half life of 2 gm of the same istotope will be __________ days.$? |
| A. | 5 |
| B. | 10 |
| C. | 20 |
| D. | 30 |
| Answer» C. 20 | |
| 170. |
_ Positron is a/an$? |
| A. | Nucleus having two protons |
| B. | Helium nucleus |
| C. | Electron with positive charge |
| D. | Nucleus with one proton and one neutron |
| Answer» D. Nucleus with one proton and one neutron | |
| 171. |
_ Fast breeder reactors are most usable in India, because of our largest __________ deposits.$? |
| A. | Thorium |
| B. | Plutonium |
| C. | Uranium |
| D. | None of these |
| Answer» B. Plutonium | |
| 172. |
_ Which of the following is not a naturally occurring nuclear fuel?$? |
| A. | Uranium⁻²38 |
| B. | Thorium⁻²33 |
| C. | Plutonium⁻²39 |
| D. | None of these |
| Answer» D. None of these | |
| 173. |
__Tarapur atomic power station__ |
| A. | Has two boiling water reactors of American design |
| B. | Has an installed capacity of 400 MW |
| C. | Is the first power reactor in India, which became critical in 1969 |
| D. | All of the above |
| Answer» E. | |
| 174. |
__Neutrons have mass approximately equal to that of __________ atoms.__ |
| A. | Hydrogen |
| B. | Helium |
| C. | Deuterium |
| D. | None of these |
| Answer» B. Helium | |
| 175. |
__Which of the following may be used to measure the rate of nuclear disintegration?__ |
| A. | Geiger-Muller Counter |
| B. | Cyclotron |
| C. | Cold chamber |
| D. | Mass spectrograph |
| Answer» B. Cyclotron | |
| 176. |
__The 92U238 emits an a-particle. The product is__ |
| A. | 90U234 |
| B. | 90U238 |
| C. | 90U236 |
| D. | 92U236 |
| Answer» B. 90U238 | |
| 177. |
__In a nuclear explosion, the energy is released primarily in the form of __________ energy.__ |
| A. | Potential |
| B. | Thermal |
| C. | Kinetic |
| D. | Electrical |
| Answer» D. Electrical | |
| 178. |
__The atomic number of a radioactive element is not changed, when it emits __________ rays.__ |
| A. | α |
| B. | β |
| C. | γ |
| D. | α & β |
| Answer» D. ≈í¬± & ≈í‚⧠| |
| 179. |
__Unit of radioactivity is__ |
| A. | Barn |
| B. | Fermi |
| C. | Angstrom |
| D. | Curie |
| Answer» E. | |
| 180. |
__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. | |
| 181. |
__Thorium metal__ |
| A. | Resembles steel in appearance |
| B. | Is less hard (in the range of silver) |
| C. | Is highly ductile |
| D. | All of the above |
| Answer» E. | |
| 182. |
__The number of neutrons accompanying the formation of 54Xe139 and 38Sr94 from the absorption of a slow neutron by 92U235 , followed by nuclear fission is__ |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» D. 4 | |
| 183. |
__Which of the following undergoes fission reaction easily?__ |
| A. | U-235 |
| B. | U-238 |
| C. | Th-232 |
| D. | None of these |
| Answer» B. U-238 | |
| 184. |
__Which one is the radioactive isotope of hydrogen?__ |
| A. | Deuterium |
| B. | Ortho-hydrogen |
| C. | Tritium |
| D. | None of these |
| Answer» D. None of these | |
| 185. |
__Pick out the wrong statement.__ |
| A. | Α-particle emission from a radioactive element makes it electrically negative |
| B. | Β-particle emission from a radioactive element makes it electrically positive |
| C. | A radioactive element having a half life period of 20 years will completely disintegrated in 40 years |
| D. | The disintegration constant of a radioactive isotope is independent of pressure, temperature or concentration |
| Answer» D. The disintegration constant of a radioactive isotope is independent of pressure, temperature or concentration | |
| 186. |
_Percentage of U-238 in natural uranium is around$? |
| A. | 0.71 |
| B. | 99.29 |
| C. | 0.015 |
| D. | 29.71 |
| Answer» C. 0.015 | |
| 187. |
_'Heavy water' is termed as 'heavy' because it is$? |
| A. | Denser than water |
| B. | An oxide of deuterium |
| C. | A heavy liquid |
| D. | An oxide of heavier isotope of oxygen |
| Answer» C. A heavy liquid | |
| 188. |
_Nuclear power generation capacity in India is$? |
| A. | 3000 MW |
| B. | 10000 MW |
| C. | More than hydroelectric power generation capacity |
| D. | More than thermal power generation capacity |
| Answer» B. 10000 MW | |
| 189. |
_Which of the following is a fuel for a fusion reactor (thermonuclear reactor)?$? |
| A. | Deuterium and tritium |
| B. | U-233 |
| C. | Thorium |
| D. | Heavy water |
| Answer» B. U-233 | |
| 190. |
_The time required for half of the __________ of a radioactive isotope to decay is called its half life.$? |
| A. | Nuclei |
| B. | Electrons |
| C. | Protons |
| D. | Neutrons |
| Answer» B. Electrons | |
| 191. |
_Nuclear fuel usually used in a Boiling Water Reactor (BWR) is$? |
| A. | Plutonium |
| B. | Enriched uranium |
| C. | Natural uranium |
| D. | Thorium |
| Answer» C. Natural uranium | |
| 192. |
_Safety rods provided in nuclear reactors to guard against accidents, in case of earthquake are made of$? |
| A. | High carbon steel |
| B. | Molybdenum |
| C. | Zircalloy |
| D. | Boron or cadmium |
| Answer» E. | |
| 193. |
_The function of moderators in nuclear reactor is to$? |
| A. | Slow down the secondary neutrons |
| B. | Absorb the secondary neutrons |
| C. | Control the chain reaction |
| D. | None of these |
| Answer» B. Absorb the secondary neutrons | |
| 194. |
_Biological shield is provided in a nuclear power reactor to protect the __________ from radiation damage.$? |
| A. | Fuel elements |
| B. | Operating personnels |
| C. | Walls of the reactor |
| D. | None of these |
| Answer» C. Walls of the reactor | |
| 195. |
_Thorium⁻²32 (a fertile material) on absorption of a neutron gets converted into __________ , which is a fissile material.$? |
| A. | Thorium⁻²33 |
| B. | Uranium⁻²35 |
| C. | Uranium⁻²33 |
| D. | Plutonium⁻²39 |
| Answer» D. Plutonium‚Äö√Ö¬™¬¨‚â§39 | |
| 196. |
_Heavy water plant is not located at$? |
| A. | Talcher |
| B. | Tuticorin |
| C. | Ramagundam |
| D. | Kota |
| Answer» D. Kota | |
| 197. |
_Which of the following accounts for the maximum energy release in the nuclear fission process?$? |
| A. | Kinetic energy of fission products |
| B. | Radioactive decay of fission products |
| C. | Instantaneous release of γ-rays |
| D. | Kinetic energy of neutrons |
| Answer» B. Radioactive decay of fission products | |
| 198. |
_Nuclear power plant is not located at$? |
| A. | Talcher (Orissa) |
| B. | Rawatbhata (Rajasthan) |
| C. | Kalpakkam (Tamilnadu) |
| D. | Kaiga (Karnataka) |
| Answer» B. Rawatbhata (Rajasthan) | |
| 199. |
_Function of control rod in a nuclear reactor is to control$? |
| A. | Temperature |
| B. | Pressure |
| C. | Fuel consumption |
| D. | Absorption of neutrons |
| Answer» E. | |
| 200. |
_The atomic weight and atomic number of an element are A and Z respectively. What is the number of neutrons in the atom of that element?$? |
| A. | A+Z |
| B. | A- Z |
| C. | A |
| D. | Z |
| Answer» C. A | |