MCQOPTIONS
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MCQOPTIONS
This section includes 150 Mcqs, each offering curated multiple-choice questions to sharpen your Mechanical Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 101. |
Uranium has isotopes$? |
| A. | U‚ÇÇ‚ÇÉ‚ÇÑ |
| B. | U‚ÇÇ‚ÇÉ‚ÇÖ |
| C. | U‚ÇÇ‚ÇÉ‚Çà |
| D. | All of these |
| Answer» E. | |
| 102. |
Artificial radioactive isotopes find application in$? |
| A. | Power generation |
| B. | Nucleonic devices |
| C. | Nuclear fission |
| D. | Medical field |
| Answer» E. | |
| 103. |
A boiling water reactor uses following as fuel$? |
| A. | Enriched uranium |
| B. | Plutonium |
| C. | Thorium |
| D. | U |
| Answer» B. Plutonium | |
| 104. |
In a fission process, maximum percentage of energy is released as$? |
| A. | Kinetic energy of neutrons |
| B. | Kinetic energy of fission products |
| C. | Instantaneous release of gamma rays |
| D. | Gradual radioactive decay of fission products |
| Answer» C. Instantaneous release of gamma rays | |
| 105. |
The fast breeder reactor uses the following moderator$? |
| A. | Demineralised water |
| B. | Carbon dioxide |
| C. | Heavy water |
| D. | No moderator is used |
| Answer» E. | |
| 106. |
A fission chain reaction in uranium can be developed by$? |
| A. | Slowing down fast neutrons so that Uz fission continues by slow motion neutrons |
| B. | Accelerating fast neutrons |
| C. | Absorbing all neutrons |
| D. | Using moderator |
| Answer» B. Accelerating fast neutrons | |
| 107. |
Reactors designed for propulsion applications are designed for$? |
| A. | Natural uranium |
| B. | Enriched uranium |
| C. | Pure uranium |
| D. | Any type of uranium |
| Answer» C. Pure uranium | |
| 108. |
Pick up the wrong statement fast breeder reactors$? |
| A. | Operate at extremely high power densities |
| B. | Are liquid metal cooled |
| C. | Produce more fuel than they consume |
| D. | Use water as coolant |
| Answer» E. | |
| 109. |
In nuclear fission each neutron that causes fission releases$? |
| A. | No new neutron |
| B. | At least one new neutron |
| C. | One new neutron |
| D. | More than one new neutron |
| Answer» E. | |
| 110. |
A moderator, in nuclear power plants, is a medium introduced into the fuel mass in order to$? |
| A. | Slow down the speed of fast moving neutrons |
| B. | Control the reaction |
| C. | Reduce the temperature |
| D. | Extracts heat from nuclear reaction |
| Answer» B. Control the reaction | |
| 111. |
A moderator$? |
| A. | Absorbs neutrons |
| B. | Does not absorb neutrons |
| C. | Accelerates neutrons |
| D. | None of these |
| Answer» C. Accelerates neutrons | |
| 112. |
Boiling water reactor uses the following as moderator, coolant and working fluid$? |
| A. | Ordinary fluid |
| B. | Heavy water |
| C. | Molten lead |
| D. | Hydrogen gas |
| Answer» B. Heavy water | |
| 113. |
Enriched uranium is required as a fuel in a nuclear reactor, if light water is used as moderator and coolant, because light water has$? |
| A. | High neutron absorption cross-section |
| B. | Low moderating efficiency |
| C. | High neutron scatter cross-section |
| D. | Low neutron absorption cross-section |
| Answer» C. High neutron scatter cross-section | |
| 114. |
A power plant giving least running cost of production of electrical power is$? |
| A. | Steam power plant |
| B. | Gas turbine power plant |
| C. | Hydro electric power plant |
| D. | Nuclear power plant |
| Answer» E. | |
| 115. |
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 |
| Answer» B. Absorbs neutrons | |
| 116. |
A fission chain reaction in uranium can be developed by? |
| A. | Slowing down fast neutrons so that Uz fission continues by slow motion neutrons |
| B. | Accelerating fast neutrons |
| C. | Absorbing all neutrons |
| D. | Using moderator |
| Answer» B. Accelerating fast neutrons | |
| 117. |
Artificial radioactive isotopes find application in? |
| A. | Power generation |
| B. | Nucleonic devices |
| C. | Nuclear fission |
| D. | Medical field |
| Answer» E. | |
| 118. |
In a fission process, maximum percentage of energy is released as? |
| A. | Kinetic energy of neutrons |
| B. | Kinetic energy of fission products |
| C. | Instantaneous release of gamma rays |
| D. | Gradual radioactive decay of fission products |
| Answer» C. Instantaneous release of gamma rays | |
| 119. |
The fast breeder reactor uses the following moderator? |
| A. | Demineralised water |
| B. | Carbon dioxide |
| C. | Heavy water |
| D. | No moderator is used |
| Answer» E. | |
| 120. |
A boiling water reactor uses following as fuel? |
| A. | Enriched uranium |
| B. | Plutonium |
| C. | Thorium |
| D. | U |
| Answer» B. Plutonium | |
| 121. |
Uranium has isotopes? |
| A. | U‚ÇÇ‚ÇÉ‚ÇÑ |
| B. | U‚ÇÇ‚ÇÉ‚ÇÖ |
| C. | U‚ÇÇ‚ÇÉ‚Çà |
| D. | All of these |
| Answer» E. | |
| 122. |
Reactors designed for propulsion applications are designed for? |
| A. | Natural uranium |
| B. | Enriched uranium |
| C. | Pure uranium |
| D. | Any type of uranium |
| Answer» C. Pure uranium | |
| 123. |
Enriched uranium is required as a fuel in a nuclear reactor, if light water is used as moderator and coolant, because light water has? |
| A. | High neutron absorption cross-section |
| B. | Low moderating efficiency |
| C. | High neutron scatter cross-section |
| D. | Low neutron absorption cross-section |
| Answer» C. High neutron scatter cross-section | |
| 124. |
A power plant giving least running cost of production of electrical power is? |
| A. | Steam power plant |
| B. | Gas turbine power plant |
| C. | Hydro electric power plant |
| D. | Nuclear power plant |
| Answer» E. | |
| 125. |
A moderator? |
| A. | Absorbs neutrons |
| B. | Does not absorb neutrons |
| C. | Accelerates neutrons |
| D. | None of these |
| Answer» C. Accelerates neutrons | |
| 126. |
Boiling water reactor uses the following as moderator, coolant and working fluid? |
| A. | Ordinary fluid |
| B. | Heavy water |
| C. | Molten lead |
| D. | Hydrogen gas |
| Answer» B. Heavy water | |
| 127. |
In nuclear fission each neutron that causes fission releases? |
| A. | No new neutron |
| B. | At least one new neutron |
| C. | One new neutron |
| D. | More than one new neutron |
| Answer» E. | |
| 128. |
A moderator, in nuclear power plants, is a medium introduced into the fuel mass in order to? |
| A. | Slow down the speed of fast moving neutrons |
| B. | Control the reaction |
| C. | Reduce the temperature |
| D. | Extracts heat from nuclear reaction |
| Answer» B. Control the reaction | |
| 129. |
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. | Use water as coolant |
| Answer» E. | |
| 130. |
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 |
| Answer» B. Absorbs neutrons | |
| 131. |
The primary fuel used in nuclear power plants is |
| A. | U‚ÇÇ‚ÇÉ‚ÇÖ |
| B. | U‚ÇÇ‚ÇÉ‚Çà |
| C. | Pu‚ÇÇ‚ÇÉ‚Çâ |
| D. | Pu‚ÇÇ‚ÇÉ‚ÇÉ |
| Answer» B. U‚Äö√á√á‚Äö√á√â‚Äö√á√ | |
| 132. |
A pressurized water reactor employs pressurizes for the following application |
| A. | To maintain constant pressure in primary circuit under varying load |
| B. | To Supply high pressure steam |
| C. | To increase pressure of water in primary circuit |
| D. | To provide sub cooled water at high pressure |
| Answer» B. To Supply high pressure steam | |
| 133. |
U‚ÇÇ‚ÇÉ‚ÇÉ is produced$ |
| A. | Artificially |
| B. | As basic raw material |
| C. | When thorium is irradiated by neutrons |
| D. | By fission of U‚ÇÇ‚ÇÉ‚Çà |
| Answer» D. By fission of U‚Äö√á√á‚Äö√á√â‚Äö√á√ | |
| 134. |
Which of the following is the primary fuel? |
| A. | U‚ÇÇ‚ÇÉ‚ÇÉ |
| B. | U |
| C. | U‚ÇÇ‚ÇÉ‚Çà |
| D. | Pu |
| Answer» C. U‚Äö√á√á‚Äö√á√â‚Äö√á√ | |
| 135. |
Enriched uranium may contain fissionable contents of the order of |
| A. | 1-99% |
| B. | 1-25% |
| C. | 1-50% |
| D. | 1-75% |
| Answer» B. 1-25% | |
| 136. |
The breeding gain in case of thermal breeder reactor as compared to fast breeder reactor is |
| A. | Same |
| B. | Lower |
| C. | Higher |
| D. | Unity |
| Answer» C. Higher | |
| 137. |
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 |
| Answer» E. | |
| 138. |
Solid fuel for nuclear reactions may be fabricated into various small shapes such as |
| A. | Plates |
| B. | Pallets |
| C. | Pins |
| D. | Any one of the above |
| Answer» E. | |
| 139. |
The following present serious difficulty in designing reactor shield |
| A. | Alpha particles |
| B. | Beta particles |
| C. | Thermal neutrons |
| D. | Fast neutrons and gamma rays |
| Answer» E. | |
| 140. |
Each fission of U‚ÇÇ‚ÇÉ‚ÇÖ produces on the average _________ fast neutrons as a product of reaction.# |
| A. | 2.46 |
| B. | 24.6 |
| C. | 246 |
| D. | 2460 |
| Answer» B. 24.6 | |
| 141. |
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 |
| Answer» C. Same | |
| 142. |
The coolant used in boiling water reactor is |
| A. | CO2 |
| B. | Pressurised water |
| C. | Mixture of water and steam |
| D. | Liquid metal |
| Answer» D. Liquid metal | |
| 143. |
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 |
| Answer» C. Different masses and different atomic numbers | |
| 144. |
The most practical fuel for a thermonuclear reactor, both from economical and nuclear consideration is |
| A. | Plutonium |
| B. | Uranium |
| C. | Deuterium |
| D. | Thorium |
| Answer» D. Thorium | |
| 145. |
Which of the following particles is the lightest? |
| A. | Nucleus |
| B. | Electron |
| C. | Proton |
| D. | Meson |
| Answer» C. Proton | |
| 146. |
In fast breeder reactors |
| A. | Any type of moderator can be used |
| B. | Graphite is used as the moderator |
| C. | Heavy water is used as the moderator |
| D. | Moderator is dispensed with |
| Answer» E. | |
| 147. |
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 |
| Answer» E. | |
| 148. |
Breeder reactors employ liquid metal coolant because it |
| A. | Acts as good moderator |
| B. | Produces maximum steam |
| C. | Transfers heat from core at a fast rate |
| D. | Breeds neutrons |
| Answer» D. Breeds neutrons | |
| 149. |
U233 is produced |
| A. | As basic raw material |
| B. | By neutron irradiation of Uz |
| C. | By neutron irradiation of thorium |
| D. | Artificially |
| Answer» D. Artificially | |
| 150. |
Ferrite material is |
| A. | The most fissionable material |
| B. | The basic fuel for nuclear paints |
| C. | Basic raw material for nuclear plants |
| D. | The material which absorbs neutrons and undergoes spontaneous changes leading to the formation of fissionable material |
| Answer» E. | |