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.
| 101. |
*/*_When the difference between mass number and atomic number of atoms of two or more elements are same, the atoms are termed as? |
| A. | Isomers |
| B. | Isotopes |
| C. | Isobars |
| D. | Isotones |
| Answer» E. | |
| 102. |
*/*_The mass number of an element is equal to the number of __________ in the nucleus.? |
| A. | Electrons |
| B. | Neutrons |
| C. | Protons |
| D. | Neutrons plus protons (i.e., nucleons) |
| Answer» E. | |
| 103. |
*/*_Graphite is used in nuclear reactor as? |
| A. | Insulation lining of the reactor |
| B. | Fuel |
| C. | Lubricant |
| D. | Retarder of neutron velocity |
| Answer» E. | |
| 104. |
*/*_The time taken for a radioactive element to reduce to 50% of its original weight is __________ years, if its half life period is 12 years.? |
| A. | 24 |
| B. | 18 |
| C. | 6 |
| D. | 36 |
| Answer» C. 6 | |
| 105. |
*/*_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 | |
| 106. |
*/*_Fast breeder test reactor at Kalpakkam is designed for using? |
| A. | Thorium as a fertile material |
| B. | U-238 as a fertile material |
| C. | Helium as a coolant |
| D. | Uranium ore directly as a fuel |
| Answer» B. U-238 as a fertile material | |
| 107. |
*/*_A radioactive substance does not emit? |
| A. | Α-ray |
| B. | Proton |
| C. | Position |
| D. | Β-ray |
| Answer» C. Position | |
| 108. |
*/*_Primary purpose of a __________ nuclear reactor is to supply a high neutron flux of the order of 10¹³ to 10¹⁴ neutrons/cm² second.? |
| A. | Research |
| B. | Power |
| C. | Breeder |
| D. | Homogeneous |
| Answer» B. Power | |
| 109. |
*/*_The atomic number of an element is equal to the number of __________ present in its atom.? |
| A. | Neutrons |
| B. | Electrons |
| C. | Protons |
| D. | Either B or C |
| Answer» E. | |
| 110. |
*/*_Radioactive decay of a material involves a __________ order reaction.? |
| A. | Third |
| B. | Second |
| C. | First |
| D. | Zero |
| Answer» D. Zero | |
| 111. |
*/*_In a pressurised water reactor (PWR), the? |
| A. | Fuel is natural uranium and heavy water acts both as moderator & coolant |
| B. | Coolant water boils in the core of the reactor |
| C. | Coolant water is pressurised to prevent bulk boiling of water in the core |
| D. | Use of moderator is not required |
| Answer» D. Use of moderator is not required | |
| 112. |
*/*_Which of the following isotopes is not present in natural uranium?? |
| A. | U-238 |
| B. | U-234 |
| C. | U-235 |
| D. | U-232 |
| Answer» E. | |
| 113. |
*/*_Final product of uranium extraction plant at Jadugoda (Bihar) is? |
| A. | Uranium |
| B. | Uranium oxide |
| C. | Uranium carbide |
| D. | Magnesium diuranate |
| Answer» E. | |
| 114. |
*/*_Which is not a fissile nuclear material?? |
| A. | U-233 |
| B. | U-235 |
| C. | U-238 |
| D. | Pu-239 |
| Answer» D. Pu-239 | |
| 115. |
*/*_Indian monazite sand contains __________ percent thorium.? |
| A. | 10 |
| B. | 25 |
| C. | 60 |
| D. | 90 |
| Answer» B. 25 | |
| 116. |
*/*_First experimental observation of nuclear fission was done by? |
| A. | Plane |
| B. | Rutherford |
| C. | Fermi |
| D. | Hahn and Strassman |
| Answer» D. Hahn and Strassman | |
| 117. |
*/*_One 'amu' is equivalent to? |
| A. | 9.31 MeV |
| B. | 931 eV |
| C. | 931 Mev |
| D. | 931J |
| Answer» D. 931J | |
| 118. |
*/*_The electric power generation cost in nuclear power plant is less than that in a coal based thermal power plant, mainly because the? |
| A. | Fuel cost per unit power generated is less |
| B. | Thermal efficiency of the former is higher |
| C. | Maintenance cost of the former is less |
| D. | None of these |
| Answer» B. Thermal efficiency of the former is higher | |
| 119. |
*/*_Which of the following types of nuclear reactors is most prone to radioactive hazards?? |
| A. | Pressurised water reactor |
| B. | Gas cooled reactor |
| C. | Molten sodium cooled reactor |
| D. | Boiling water reactor |
| Answer» E. | |
| 120. |
*/*_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 | |
| 121. |
*/*_Nuclear power reactor located at Tarapur is of __________ type.? |
| A. | Fast breeder |
| B. | Pressurised water |
| C. | Boiling water |
| D. | Gas cooled |
| Answer» D. Gas cooled | |
| 122. |
*/*_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. | |
| 123. |
*/*_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 of the above |
| Answer» E. | |
| 124. |
*/*_Nuclear fuel generally used in reactors is uranium oxide instead of uranium, because the former has higher? |
| A. | Melting point, hence can be subjected to higher temperature |
| B. | Density ; hence core volume for a given power output would be smaller |
| C. | Resistance to effects of irradiation |
| D. | All of the above |
| Answer» E. | |
| 125. |
*/*_The largest stable nucleus is? |
| A. | U-235 |
| B. | U-238 |
| C. | Pb-206 |
| D. | Bi-209 |
| Answer» B. U-238 | |
| 126. |
*/*_Which of the following is the best nuclear fuel?? |
| A. | Np- 239 |
| B. | U-234 |
| C. | Pu-239 |
| D. | Th-236 |
| Answer» D. Th-236 | |
| 127. |
*/*_A fast breeder reactor employs? |
| A. | Graphite as moderator |
| B. | Water as coolant |
| C. | Molten sodium as coolant as well as moderator |
| D. | U-235 as fuel |
| Answer» E. | |
| 128. |
*/*_The number of neutrons in the nucleus of Uranium⁻²33 (92U233) is? |
| A. | 141 |
| B. | 92 |
| C. | 233 |
| D. | 325 |
| Answer» B. 92 | |
| 129. |
*/*_A radioactive isotope undergoes decay with respect to time following __________ law.? |
| A. | Logarithmic |
| B. | Exponential |
| C. | Linear |
| D. | Inverse square |
| Answer» C. Linear | |
| 130. |
*/*_Artificially produced radioactive isotopes are used for? |
| A. | Power generation |
| B. | Treatment of certain diseases |
| C. | Initiating nuclear fission and fusion |
| D. | All of the above |
| Answer» C. Initiating nuclear fission and fusion | |
| 131. |
*/*_Which of the following is not, a fertile material?? |
| A. | Th-232 |
| B. | U-238 |
| C. | U-233 |
| D. | None of these |
| Answer» D. None of these | |
| 132. |
*/*_Energy produced in the nuclear fission is of the order of __________ MeV.? |
| A. | 20 |
| B. | 200 |
| C. | 1000 |
| D. | 2000 |
| Answer» C. 1000 | |
| 133. |
*/*_H‚ÇÇ is a better coolant than CO‚ÇÇ, due to its 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 | |
| 134. |
%_Energy produced in the nuclear fission is of the order of __________ MeV._% |
| A. | 20 |
| B. | 200 |
| C. | 1000 |
| D. | 2000 |
| Answer» C. 1000 | |
| 135. |
%_Which of the following is not, a fertile material?_% |
| A. | Th-232 |
| B. | U-238 |
| C. | U-233 |
| D. | None of these |
| Answer» D. None of these | |
| 136. |
%_H‚ÇÇ is a better coolant than CO‚ÇÇ, due to its 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 | |
| 137. |
%_Artificially produced radioactive isotopes are used for_% |
| A. | Power generation |
| B. | Treatment of certain diseases |
| C. | Initiating nuclear fission and fusion |
| D. | All of the above |
| Answer» C. Initiating nuclear fission and fusion | |
| 138. |
%_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 | |
| 139. |
_ Candu reactor is a __________ nuclcear reactor.$? |
| A. | Natural uranium fuelled heavy water cooled & moderated |
| B. | Highly enriched uranium (85% U-235) fuelled |
| C. | Homogeneous |
| D. | Fast breeder |
| Answer» B. Highly enriched uranium (85% U-235) fuelled | |
| 140. |
_ Isotopes of an element have the same$? |
| A. | Number of neutrons |
| B. | Mass number |
| C. | Electronic configuration |
| D. | Atomic weight |
| Answer» D. Atomic weight | |
| 141. |
_ Gas cooling as compared to water cooling of nuclear reactors$? |
| A. | Can not attain a high temperature |
| B. | Is more efficient as gas has a higher specific heat |
| C. | Can produce only saturated steam for feeding to power turbine |
| D. | None of these |
| Answer» E. | |
| 142. |
_ The molecular weight of heavy water is$? |
| A. | 10 |
| B. | 18 |
| C. | 20 |
| D. | 36 |
| Answer» D. 36 | |
| 143. |
_ Extraction of uranium from its ore is done using __________ methods.$? |
| A. | Electrometallurgical |
| B. | Pyrometallurgical |
| C. | Chemical |
| D. | Physical beneficiation |
| Answer» D. Physical beneficiation | |
| 144. |
_ The velocity of thermal (slow) neutrons triggering nuclear fission reaction (having energy equal to 0.025 eV) is about __________ metres/second.$? |
| A. | 1100 |
| B. | 2200 |
| C. | 3300 |
| D. | 4400 |
| Answer» C. 3300 | |
| 145. |
_ Which is a fertile nuclear fuel?$? |
| A. | U-233 |
| B. | U-235 |
| C. | Pu-239 |
| D. | Th-232 |
| Answer» E. | |
| 146. |
_ Which of the following ores contains maximum percentage of uranium?$? |
| A. | Carnotite |
| B. | Thorium |
| C. | Rescolite |
| D. | Pitchblende |
| Answer» E. | |
| 147. |
_ Thorium metal$? |
| A. | Resembles steel in appearance |
| B. | Is less hard (in the range of silver) |
| C. | Is highly ductile |
| D. | All of the above |
| Answer» E. | |
| 148. |
_ In the nuclear reaction, 93N239 ‚Üí 93Pu239 + ?; the missing particle is a/an$? |
| A. | Electron |
| B. | Proton |
| C. | Neutron |
| D. | Position |
| Answer» B. Proton | |
| 149. |
_ Out of the following places, heavy water plant is not located at$? |
| A. | Baroda |
| B. | Ramagundam |
| C. | Talcher |
| D. | Tuticorin |
| Answer» C. Talcher | |
| 150. |
_ The emission of an a-particle causes the resultant nucleus to have$? |
| A. | More atomic weight and less atomic number |
| B. | Less atomic weight and less atomic number |
| C. | Less atomic weight and more atomic number |
| D. | None of these |
| Answer» B. Less atomic weight and less atomic number | |