MCQOPTIONS
Saved Bookmarks
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.
| 351. |
Both tritium and deuterium have the same number of |
| A. | neutrons |
| B. | electrons |
| C. | protons |
| D. | nucleons |
| Answer» B. electrons | |
| 352. |
Which of the following nuclear reactors is the most efficient thermodynamically while operating between the same temperature and pressure limits of the reactor ? |
| A. | Molten sodium cooled |
| B. | CO2 gas cooled |
| C. | Pressurised water |
| D. | Boiling water |
| Answer» E. | |
| 353. |
The most commonly used nuclear fuel in boiling water reactor is |
| A. | enriched uranium |
| B. | natural uranium |
| C. | plutonium |
| D. | monazite sand |
| Answer» B. natural uranium | |
| 354. |
Out of the following, nucleus of __________ atom contains the largest number of neutrons. |
| A. | U-235 |
| B. | U-238 |
| C. | U-239 |
| D. | Pu-239 |
| Answer» D. Pu-239 | |
| 355. |
Which one is radioactive in nature ? |
| A. | Helium |
| B. | Deuterium |
| C. | Heavy hydrogen |
| D. | Tritium |
| Answer» E. | |
| 356. |
Coolant used in a boiling water reactor is |
| A. | hydrogen gas |
| B. | water |
| C. | steam |
| D. | a mixture of water & steam |
| Answer» E. | |
| 357. |
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 | |
| 358. |
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. | |
| 359. |
The most abundant isotope of natural uranium is |
| A. | 92U238 |
| B. | 92U235 |
| C. | 92U234 |
| D. | none of these |
| Answer» B. 92U235 | |
| 360. |
The number of neutrons in the nucleus of Uranium-233 (92U233) is |
| A. | 141 |
| B. | 92 |
| C. | 233 |
| D. | 325 |
| Answer» B. 92 | |
| 361. |
Nuclear power plant is not located at |
| A. | Talcher (Orissa) |
| B. | Rawatbhata (Rajasthan) |
| C. | Kalpakkam (Tamilnadu) |
| D. | Kaiga (Karnataka) |
| Answer» B. Rawatbhata (Rajasthan) | |
| 362. |
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 | |
| 363. |
Fuel for a fast breeder reactor is |
| A. | plutonium |
| B. | uranium |
| C. | radium |
| D. | neptunium |
| Answer» B. uranium | |
| 364. |
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. | |
| 365. |
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 | |
| 366. |
Uranium percentage in monazite sand is about |
| A. | 0.01 |
| B. | 0.25 |
| C. | 1.2 |
| D. | 7 |
| Answer» C. 1.2 | |
| 367. |
75% of a radioactive element decays in 6 hours. Its half life period is __________ hours. |
| A. | 43558 |
| B. | 43617 |
| C. | 3 |
| D. | 4 |
| Answer» D. 4 | |
| 368. |
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. | |
| 369. |
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 | |
| 370. |
The 92U238 emits an a-particle. The product is |
| A. | 90U234 |
| B. | 90U238 |
| C. | 90U236 |
| D. | 92U236 |
| Answer» B. 90U238 | |
| 371. |
Neutrons have mass approximately equal to that of __________ atoms. |
| A. | hydrogen |
| B. | helium |
| C. | deuterium |
| D. | none of these |
| Answer» B. helium | |
| 372. |
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 | |
| 373. |
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. | |
| 374. |
Graphite is used in nuclear reactor as |
| A. | insulation lining of the reactor. |
| B. | fuel. |
| C. | lubricant. |
| D. | retarder of neutron velocity. |
| Answer» E. | |
| 375. |
A heterogeneous reactor is the one, in which the moderator and the |
| A. | coolant are different materials. |
| B. | coolant are present in different phases (e.g., heavy water and graphite). |
| C. | fuel are present in different phases (e.g. uranium and heavy water). |
| D. | none of these. |
| Answer» D. none of these. | |
| 376. |
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. Œ±-rays | |
| 377. |
Uranium ore is currently mined & concentrated at |
| A. | Jadugoda |
| B. | Ghatsila |
| C. | Khetri |
| D. | Alwaye |
| Answer» B. Ghatsila | |
| 378. |
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 | |
| 379. |
U-235 content in enriched uranium, that is normally used in power reactors (e.g., at Tarapur atomic power plant), is about __________ percent. |
| A. | 85 |
| B. | 50 |
| C. | 3 |
| D. | 97 |
| Answer» D. 97 | |
| 380. |
Hydrogen differs from deuterium in __________ properties. |
| A. | radioactive |
| B. | physical |
| C. | chemical |
| D. | all (a), (b) and (c) |
| Answer» C. chemical | |
| 381. |
Artificially produced radioactive isotopes are used for |
| A. | power generation. |
| B. | treatment of certain diseases. |
| C. | initiating nuclear fission and fusion. |
| D. | all (a), (b) and (c). |
| Answer» C. initiating nuclear fission and fusion. | |
| 382. |
__________ have the same mass number, but different nuclear charge. |
| A. | Isotopes |
| B. | Isobars |
| C. | Isotones |
| D. | none of these |
| Answer» C. Isotones | |
| 383. |
Percentage of heavy water in ordinary water is around |
| A. | 0.015 |
| B. | 7.54 |
| C. | 0.71 |
| D. | 32.97 |
| Answer» B. 7.54 | |
| 384. |
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. | |
| 385. |
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 | |
| 386. |
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. | |
| 387. |
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 | |
| 388. |
Energy equivlant to one atomic mass unit (amu) is __________ MeV. |
| A. | 9.31 |
| B. | 93.1 |
| C. | 931 |
| D. | 9310 |
| Answer» D. 9310 | |
| 389. |
Pressure in a Pressurised Water Reactor (PWR) is used for |
| A. | maintaining constant pressure in the primary cooling circuit under varying loads. |
| B. | superheating the steam. |
| C. | pressurising the water in the primary coolant circuit. |
| D. | none of these. |
| Answer» B. superheating the steam. | |
| 390. |
Fission of U-235 on slow neutron bombardment can be represented by |
| A. | 92U235 + 3 γ1 56Ba143 + 36Kr90 |
| B. | 92U235 + 0n1 56Ba143 + 36Kr90 + 3 0n1 |
| C. | 92U235 + 0n1 56Ba143 + 36Kr90 + 3 0n1 + Q (energy) |
| D. | 92U235 + 0n1 92U236 + 30n1+ Q (energy) |
| Answer» D. 92U235 + 0n1 92U236 + 30n1+ Q (energy) | |
| 391. |
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 | |
| 392. |
The radioisotope used to study the thyroid gland is |
| A. | iodine |
| B. | cobalt |
| C. | iron |
| D. | carbon |
| Answer» B. cobalt | |
| 393. |
Extraction of uranium from its ore is done by __________ method. |
| A. | chemical |
| B. | pyrometallurgical |
| C. | physical beneficiation |
| D. | electrometallurgical |
| Answer» B. pyrometallurgical | |
| 394. |
Emission of β-particles during radioactive decay of a substance is from$ |
| A. | innermost shell |
| B. | nucleus |
| C. | outermost shell |
| D. | none of these |
| Answer» C. outermost shell | |
| 395. |
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. | |
| 396. |
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 | |
| 397. |
Uranium ore is mined & concentrated in India at |
| A. | Jadugoda(Jharkhand) |
| B. | Kota (Rajasthan) |
| C. | Tuticorin (Tamilnadu) |
| D. | Talchar (Orissa) |
| Answer» B. Kota (Rajasthan) | |
| 398. |
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 (a), (b) and (c). |
| Answer» D. all (a), (b) and (c). | |
| 399. |
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. | |
| 400. |
Which of the following nuclear materials is fissile ? |
| A. | Uranium-238 |
| B. | Thorium-232 |
| C. | Plutonium-239 |
| D. | None of these |
| Answer» D. None of these | |