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.
| 201. |
_Fuel for a fast breeder reactor is$? |
| A. | Plutonium |
| B. | Uranium |
| C. | Radium |
| D. | Neptunium |
| Answer» B. Uranium | |
| 202. |
_Which is the most commonly used molten metal for cooling of nuclear reactors?$? |
| A. | Calcium |
| B. | Sodium |
| C. | Mercury |
| D. | Zinc |
| Answer» C. Mercury | |
| 203. |
A homogeneous reactor is the one, in which the$? |
| A. | Fissile atoms are evenly distributed throughout the mass of nuclear reactor |
| B. | Same substance (e.g. heavy water) is used as moderator & coolant |
| C. | The fuel and the moderator is mixed to form a homogeneous material |
| D. | All of the above |
| Answer» D. All of the above | |
| 204. |
Nucleus of 92U235 contains __________ protons.$? |
| A. | 92 |
| B. | 235 |
| C. | 143 |
| D. | 325 |
| Answer» B. 235 | |
| 205. |
Liquid metal (e.g, . molten sodium) is preferred as a coolant in case of a/an __________ reactor.$? |
| A. | Homogeneous |
| B. | Graphite moderated |
| C. | Fast breeder |
| D. | Enriched uranium (3% U-235) fuelled |
| Answer» D. Enriched uranium (3% U-235) fuelled | |
| 206. |
Hydrogen has __________ isotopes.$? |
| A. | No |
| B. | One |
| C. | Two |
| D. | Three |
| Answer» E. | |
| 207. |
Uranium ore is currently mined & concentrated at$? |
| A. | Jadugoda |
| B. | Ghatsila |
| C. | Khetri |
| D. | Alwaye |
| Answer» B. Ghatsila | |
| 208. |
Thermal nuclear reactors using enriched uranium as fuel contains a maximum of __________ percent fissile material i.e. U-235.$? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 7 |
| Answer» D. 7 | |
| 209. |
Which of the following is not used as a moderator in nuclear reactor?$? |
| A. | Molten sodium |
| B. | Light water |
| C. | Beryllium |
| D. | Boron hydride |
| Answer» B. Light water | |
| 210. |
Mass of a positron is same as that of a/an$? |
| A. | Electron |
| B. | α-particle |
| C. | Proton |
| D. | Neutron |
| Answer» B. ≈í¬±-particle | |
| 211. |
Which of the following is a non-fissile material?$? |
| A. | Plutonium⁻²39 |
| B. | Uranium⁻²35 |
| C. | Uranium⁻²33 |
| D. | Thorium⁻²32 |
| Answer» E. | |
| 212. |
The specific heats of three gaseous coolants namely H‚ÇÇ, He and CO‚ÇÇ in the increasing order are$? |
| A. | CO‚ÇÇ, He, H‚ÇÇ |
| B. | CO‚ÇÇ, H‚ÇÇ, He |
| C. | H‚ÇÇ, He, CO‚ÇÇ |
| D. | H‚ÇÇ, CO‚ÇÇ, He |
| Answer» B. CO‚Äö√á√á, H‚Äö√á√á, He | |
| 213. |
Secondary cooling circuit is a must in molten sodium cooled fast breeder reactor for$? |
| A. | Achieving high degree of superheat in the steam |
| B. | Faster heat removal rate from the core |
| C. | Lowering the coolant circulation pressure |
| D. | Avoiding the mixing of water with radioactive sodium, as it may cause explosion |
| Answer» E. | |
| 214. |
Commercial power generation from fusion reactor is not yet possible, because$? |
| 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 | |
| 215. |
Nuclear fuel complex, Hyderabad is engaged in the job of$? |
| A. | Manufacture of nuclear fuel elements/assemblies |
| B. | Processing of uranium ore |
| C. | Treatment of spent fuel |
| D. | None of these |
| Answer» B. Processing of uranium ore | |
| 216. |
Uranium percentage in monazite sand is about$? |
| A. | 0.01 |
| B. | 0.25 |
| C. | 1.2 |
| D. | 7 |
| Answer» C. 1.2 | |
| 217. |
The half life period of a radiactive element is 100 days. After 400 days, one gm of the element will be reduced to __________ gm.$? |
| A. | 1/4 |
| B. | 1/8 |
| C. | 1/2 |
| D. | 1/16 |
| Answer» E. | |
| 218. |
A thermal nuclear reactor compared to a fast breeder reactor$? |
| 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 | |
| 219. |
Moderating material used in a thermal-reactor should be a$? |
| A. | Good absorber of neutrons |
| B. | Solid substance |
| C. | Poor absorber of neutrons |
| D. | None of these |
| Answer» D. None of these | |
| 220. |
The first underground nuclear test was conducted by India at$? |
| A. | Jaisalmer |
| B. | Pokharan |
| C. | Kalpakkam |
| D. | Narora |
| Answer» C. Kalpakkam | |
| 221. |
Coolant present in the primary circuit of a pressurised water reactor is high pressure$? |
| A. | Sub cooled water |
| B. | Saturated water |
| C. | Superheated steam |
| D. | Saturated steam |
| Answer» C. Superheated steam | |
| 222. |
Percentage of natural uranium present in uranium ore found in Jadugoda (Jharkhand) is$? |
| A. | 0.1 |
| B. | 1 |
| C. | 3 |
| D. | 12 |
| Answer» B. 1 | |
| 223. |
Thorium can be converted into U-233 in a __________ reactor.$? |
| A. | Liquid metal cooled |
| B. | Fast breeder |
| C. | Thermal |
| D. | Swimming pool |
| Answer» C. Thermal | |
| 224. |
In β-decay of radioactive material, the ratio of neutron to proton$? |
| A. | Increases |
| B. | Remains same |
| C. | Decreases |
| D. | Is unpredictable; may increase or decrease |
| Answer» D. Is unpredictable; may increase or decrease | |
| 225. |
Which of the following is present in Bhabha Atomic Research Centre (BARC) complex, Trombay (Bombay)?$? |
| A. | Power reactor |
| B. | Research reactor |
| C. | Fast breeder reactor |
| D. | Heavy water plant |
| Answer» C. Fast breeder reactor | |
| 226. |
The half life period of a radioactive element depends upon the$? |
| A. | Temperature |
| B. | Pressure |
| C. | Amount of element present |
| D. | None of these |
| Answer» E. | |
| 227. |
Which one is different for the neutral atoms of the isotopes of an element?$? |
| A. | Atomic weights |
| B. | Atomic numbers |
| C. | Number of protons |
| D. | Number of electrons |
| Answer» B. Atomic numbers | |
| 228. |
The phenomenon of nuclear fission is opposite to that of$? |
| A. | Radioactive decay |
| B. | Thermionic emission |
| C. | Nuclear fusion |
| D. | Combustion |
| Answer» D. Combustion | |
| 229. |
Thermal shield is used in high powered nuclear reactors to$? |
| A. | Protect the walls of the reactor from radiation damage |
| B. | Absorb the fast neutrons |
| C. | Slow down the secondary neutrons |
| D. | Protect the fuel element from coming in contact with the coolant |
| Answer» B. Absorb the fast neutrons | |
| 230. |
The ratio of volume of an atom to that of its nucleus is$? |
| A. | 10¹² |
| B. | 10⁻¹² |
| C. | 10⁻⁸ |
| D. | 10‚Äö√Ö‚àè |
| Answer» B. 10‚Äö√Ö¬™¬¨œÄ¬¨‚⧠| |
| 231. |
Which of the following may not need a moderator?$? |
| A. | Candu reactor |
| B. | Fast breeder reactor |
| C. | Homogeneous reactor |
| D. | Pressurised water reactor |
| Answer» C. Homogeneous reactor | |
| 232. |
The critical mass of a fissionable material can be reduced by$? |
| A. | Heating it |
| B. | Cooling it |
| C. | Surrounding it by neutron reflecting material |
| D. | Surrounding it by neutron absorbing material |
| Answer» D. Surrounding it by neutron absorbing material | |
| 233. |
The atomic mass of an element is fractional, because$? |
| A. | Of uncertainty principle |
| B. | It may have isobars |
| C. | It contains neutrons |
| D. | It may have isotopes |
| Answer» E. | |
| 234. |
A fertile material is the one, which can be$? |
| A. | Converted into fissile material on absorption of neutron |
| B. | Fissioned by slow (thermal) neutrons |
| C. | Fissioned by fast neutrons |
| D. | Fissioned by either slow or fast neutrons |
| Answer» B. Fissioned by slow (thermal) neutrons | |
| 235. |
Ceramic nuclear metals compared to solid nuclear metals have$? |
| A. | Higher melting points |
| B. | Low strength at high temperature |
| C. | More chances of radiation damage |
| D. | Poorer corrosion resistance |
| Answer» B. Low strength at high temperature | |
| 236. |
Atoms of U-238 and U-235 differ in structure by three$? |
| A. | Electrons and three protons |
| B. | Protons |
| C. | Neutrons |
| D. | Electrons |
| Answer» D. Electrons | |
| 237. |
Plutonium? |
| A. | Is recovered from spent fuel from thermal nuclear reactor |
| B. | Has much lower melting point (640°C ) compared to thorium (1690°C) |
| C. | Both A & B |
| D. | Neither A nor B |
| Answer» D. Neither A nor B | |
| 238. |
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 | |
| 239. |
A fertile material is the one, which can be? |
| A. | Converted into fissile material on absorption of neutron |
| B. | Fissioned by slow (thermal) neutrons |
| C. | Fissioned by fast neutrons |
| D. | Fissioned by either slow or fast neutrons |
| Answer» B. Fissioned by slow (thermal) neutrons | |
| 240. |
The atomic mass of an element is fractional, because? |
| A. | Of uncertainty principle |
| B. | It may have isobars |
| C. | It contains neutrons |
| D. | It may have isotopes |
| Answer» E. | |
| 241. |
The half life period of a radioactive element depends upon the? |
| A. | Temperature |
| B. | Pressure |
| C. | Amount of element present |
| D. | None of these |
| Answer» E. | |
| 242. |
Ceramic nuclear metals compared to solid nuclear metals have? |
| A. | Higher melting points |
| B. | Low strength at high temperature |
| C. | More chances of radiation damage |
| D. | Poorer corrosion resistance |
| Answer» B. Low strength at high temperature | |
| 243. |
The critical mass of a fissionable material can be reduced by? |
| A. | Heating it |
| B. | Cooling it |
| C. | Surrounding it by neutron reflecting material |
| D. | Surrounding it by neutron absorbing material |
| Answer» D. Surrounding it by neutron absorbing material | |
| 244. |
Which of the following is present in Bhabha Atomic Research Centre (BARC) complex, Trombay (Bombay)?? |
| A. | Power reactor |
| B. | Research reactor |
| C. | Fast breeder reactor |
| D. | Heavy water plant |
| Answer» C. Fast breeder reactor | |
| 245. |
The ratio of volume of an atom to that of its nucleus is? |
| A. | 10¹² |
| B. | 10⁻¹² |
| C. | 10⁻⁸ |
| D. | 10‚Äö√Ö‚àè |
| Answer» B. 10‚Äö√Ö¬™¬¨œÄ¬¨‚⧠| |
| 246. |
Sodium melts (at atmospheric pressure) at a temperature of __________ °C.$ |
| A. | 58 |
| B. | 98 |
| C. | 348 |
| D. | 588 |
| Answer» C. 348 | |
| 247. |
Which of the following is artificially produced as it does not occur in nature? |
| A. | Uranium⁻²35 |
| B. | Uranium⁻²33 |
| C. | Plutonium⁻²39 |
| D. | Both B and C |
| Answer» E. | |
| 248. |
Water is a better coolant than a gas (like CO‚ÇÇ, He, N‚ÇÇ etc.), because it$ |
| A. | Is a better neutron moderator as well |
| B. | Requires comparatively smaller pumps and heat exchanger for a given heat transfer rate |
| C. | Has a better heat transfer characteristics, and it can be pressurised to attain a high temperature |
| D. | All of the above |
| Answer» E. | |
| 249. |
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 | |
| 250. |
What is the average life of a radioactive atom having a 'half life period' of T? |
| A. | 1.44 T |
| B. | 0.144 T |
| C. | 14.4 T |
| D. | 2T |
| Answer» B. 0.144 T | |