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.
| 301. |
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 | |
| 302. |
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. | |
| 303. |
Which of the following is the most harmful for the human being ? |
| A. | β-rays |
| B. | X-rays |
| C. | γ-rays |
| D. | ultra violet rays |
| Answer» D. ultra violet rays | |
| 304. |
Isotopes of an element have different |
| A. | mass number |
| B. | electronic configuration |
| C. | nuclear charge |
| D. | chemical properties |
| Answer» B. electronic configuration | |
| 305. |
First experimental observation of nuclear fission was done by |
| A. | Plane |
| B. | Rutherford |
| C. | Fermi |
| D. | Hahn and Strassman |
| Answer» D. Hahn and Strassman | |
| 306. |
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. | |
| 307. |
Heavy water is used as a moderator in a |
| A. | pressurised water reactor (PWR). |
| B. | boiling water reactor (BWR). |
| C. | Candu reactor. |
| D. | molten sodium cooled reactor. |
| Answer» D. molten sodium cooled reactor. | |
| 308. |
The main ore of uranium is |
| A. | pitchblende |
| B. | monazite sand |
| C. | cassiterite |
| D. | chalcopyrite |
| Answer» B. monazite sand | |
| 309. |
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. | |
| 310. |
Specific gravity of uranium and plutonium is about |
| A. | 9 |
| B. | 13 |
| C. | 19 |
| D. | 27 |
| Answer» D. 27 | |
| 311. |
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) | |
| 312. |
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. | |
| 313. |
Solar energy results from __________ reaction. |
| A. | fission |
| B. | combustion |
| C. | thermonuclear |
| D. | none of these |
| Answer» D. none of these | |
| 314. |
Which of the following is not an ore of uranium ? |
| A. | Pitchblende |
| B. | Kyanite |
| C. | Carnotite |
| D. | Rescolite |
| Answer» C. Carnotite | |
| 315. |
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 | |
| 316. |
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 | |
| 317. |
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 (a), (b) and (c). |
| Answer» E. | |
| 318. |
__________ gas is normally not used as a coolant in a nuclear reactor, because of its high neutron capture cross-section. |
| A. | Nitrogen |
| B. | Hydrogen |
| C. | Helium |
| D. | Carbon dioxide |
| Answer» B. Hydrogen | |
| 319. |
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. | |
| 320. |
A fast breeder reactor |
| A. | utilises fast neutrons for causing fission. |
| B. | converts fertile material (e.g., U-238) into fissile material (Pu-239). |
| C. | normally employs molten sodium as coolant. |
| D. | all (a), (b) and (c). |
| Answer» E. | |
| 321. |
Nucleus of tritium has __________ neutrons. |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 5 |
| Answer» C. 3 | |
| 322. |
Pressure of CO2 gas (which is a coolant) in the Calder-Hall nuclear reactor is __________ kgf/cm2 . |
| A. | 0.2 |
| B. | 7 |
| C. | 35 |
| D. | 50 |
| Answer» C. 35 | |
| 323. |
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. | |
| 324. |
Radioactivity of an isotope is expressed in |
| A. | barn |
| B. | MeV |
| C. | Curie |
| D. | Ergs |
| Answer» D. Ergs | |
| 325. |
An element having large number of __________ is most easily subjected to nuclear fission. |
| A. | protons |
| B. | electrons |
| C. | neutrons |
| D. | nucleons |
| Answer» E. | |
| 326. |
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 | |
| 327. |
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. | |
| 328. |
Out of the following places, heavy water plant is not located at |
| A. | Baroda |
| B. | Ramagundam |
| C. | Talcher |
| D. | Tuticorin |
| Answer» C. Talcher | |
| 329. |
Mass of a positron is same as that of a/an |
| A. | electron |
| B. | α-particle |
| C. | proton |
| D. | neutron |
| Answer» B. Œ±-particle | |
| 330. |
Function of control rod in a nuclear reactor is to control |
| A. | temperature |
| B. | pressure |
| C. | fuel consumption |
| D. | absorption of neutrons |
| Answer» E. | |
| 331. |
Quantity of fissionable material (i.e. U-235) in natural uranium is __________ percent. |
| A. | 0.71 |
| B. | 6.31 |
| C. | 99.29 |
| D. | 12.73 |
| Answer» B. 6.31 | |
| 332. |
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 | |
| 333. |
The ratio of neutrons to protons of an element having a mass number and atomic number of 80 and 40 respectively is |
| A. | 1 |
| B. | 0.5 |
| C. | 2 |
| D. | 4 |
| Answer» B. 0.5 | |
| 334. |
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 | |
| 335. |
Percentage of the heavy water in ordi water is around |
| A. | 0.015 |
| B. | 7.54 |
| C. | 0.71 |
| D. | 32.97 |
| Answer» B. 7.54 | |
| 336. |
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. | |
| 337. |
'Light water' used as a coolant in nuclear reactor is nothing but |
| A. | ordinary water. |
| B. | mildly acidic (pH = 6) water. |
| C. | mildly alkaline (pH = 8) water. |
| D. | none of these. |
| Answer» B. mildly acidic (pH = 6) water. | |
| 338. |
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 (a), (b) and (c). |
| Answer» E. | |
| 339. |
Extraction of uranium from its ore is done using __________ methods. |
| A. | electrometallurgical |
| B. | pyrometallurgical |
| C. | chemical |
| D. | physical beneficiation |
| Answer» D. physical beneficiation | |
| 340. |
Bhabha Atomic Research Centre (BARC) located at Trombay (near Bombay) has |
| A. | five operating research reactors (namely Apsara, Cirus Zerelina, Purnima and Dhurva). |
| B. | a 420 MW nuclear power plant. |
| C. | a very large capacity (100 tons/yr) heavy water plant. |
| D. | all (a), (b) and (c). |
| Answer» B. a 420 MW nuclear power plant. | |
| 341. |
The sum of masses of two nuclei produced in nuclear fission compared to the mass of original nucleus is |
| A. | less |
| B. | more |
| C. | same |
| D. | much more |
| Answer» B. more | |
| 342. |
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. | |
| 343. |
Net efficiency of ordinary light water cooled nuclear reactor is about __________ percent. |
| A. | 32 |
| B. | 52 |
| C. | 72 |
| D. | 88 |
| Answer» B. 52 | |
| 344. |
The size of an atom is of the order of one |
| A. | °Angstrom |
| B. | fermi |
| C. | micron |
| D. | mm |
| Answer» B. fermi | |
| 345. |
In a homogeneous nuclear reactor, the __________ are mixed together. |
| A. | fuel & coolant |
| B. | fuel & moderator |
| C. | coolant & moderator |
| D. | none of these |
| Answer» C. coolant & moderator | |
| 346. |
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. | |
| 347. |
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. | |
| 348. |
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-239 | |
| 349. |
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. | |
| 350. |
Use of molten metal as a coolant in fast breeder reactor helps in |
| A. | rapid heat transfer from the core. |
| B. | accelerating the reaction rate in the core. |
| C. | breeding neutrons. |
| D. | accelerating the neutrons. |
| Answer» B. accelerating the reaction rate in the core. | |