MCQOPTIONS
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MCQOPTIONS
This section includes 286 Mcqs, each offering curated multiple-choice questions to sharpen your GATE (Mechanical Engineering) knowledge and support exam preparation. Choose a topic below to get started.
| 251. |
For economical operation of a nuclear plant |
| A. | used fuel should be reprocessed |
| B. | moderator should be used |
| C. | coolant should be employed |
| D. | control rods should be used |
| Answer» B. moderator should be used | |
| 252. |
The function of control rods in nuclear plants is to |
| A. | control temperature |
| B. | control readioactive pollution |
| C. | control absorption of neutron |
| D. | control fuel consumption |
| Answer» D. control fuel consumption | |
| 253. |
Reactors for propulsion applications use |
| A. | natural uranium |
| B. | molten lead |
| C. | any form of uranium |
| D. | thorium |
| Answer» C. any form of uranium | |
| 254. |
Which of the following can be used as a coolant in nuclear plant |
| A. | light or heavy water |
| B. | molten lead |
| C. | carbon dioxide |
| D. | freon |
| Answer» B. molten lead | |
| 255. |
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. | |
| 256. |
Plutonium-239 is produced |
| A. | as basic raw material |
| B. | by neutron irradiation of IT |
| C. | by neutron irradiation of thorium |
| D. | artificially |
| Answer» C. by neutron irradiation of thorium | |
| 257. |
Uranium-233 is produced |
| A. | as basic raw material |
| B. | by neutron irradiation of Uz |
| C. | by neutron irradiation of thorium |
| D. | artificially |
| Answer» D. artificially | |
| 258. |
Electron-volt is the unit of |
| A. | atomic power |
| B. | energy |
| C. | voltage |
| D. | radio activity |
| Answer» C. voltage | |
| 259. |
Plutonium is produced |
| A. | as basic raw material |
| B. | by neutron irradiation of Uz |
| C. | by neutron irradiation of throium |
| D. | artificially |
| Answer» C. by neutron irradiation of throium | |
| 260. |
Hydrogen is preferred as better coolant in comparison to C02 because former |
| A. | is lighter |
| B. | is inert |
| C. | has high specific heat |
| D. | is a good conductor |
| Answer» D. is a good conductor | |
| 261. |
A reactor capable of converting a ferrite material into fissile isotopes is called |
| A. | regenerative reactor |
| B. | fast breeder reactor |
| C. | breeder reactor |
| D. | boiling water reactor |
| Answer» B. fast breeder reactor | |
| 262. |
U238 will undergo fission b |
| A. | high energy (fast) neutrons alone |
| B. | low energy (slow) neutrons alone |
| C. | either fast or slow neutrons |
| D. | medium energy neutrons |
| Answer» B. low energy (slow) neutrons alone | |
| 263. |
Ideally the neutron flux in reactor should be |
| A. | maximum in center and zero at side |
| B. | maximum at side and zero in center |
| C. | uniform throughout |
| D. | zero throughout |
| Answer» D. zero throughout | |
| 264. |
Boiling water reactor uses the following as moderator, coolant and working fluid |
| A. | ordinary fluid |
| B. | heavy water |
| C. | molten lead |
| D. | hydrogen ga |
| Answer» B. heavy water | |
| 265. |
The nuclear power plant at Tarapur has the following reactor |
| A. | fast breeder |
| B. | pressurised water |
| C. | boiling water |
| D. | sodium graphite |
| Answer» D. sodium graphite | |
| 266. |
The first unclear power plant in India is located at |
| A. | Kota |
| B. | Kalapakkam |
| C. | Tarapur |
| D. | Baraeilly |
| Answer» D. Baraeilly | |
| 267. |
The process by which a heavy nucleus is splitted into two light nuclei is known as |
| A. | splitting |
| B. | fission |
| C. | fusion |
| D. | disintegration |
| Answer» C. fusion | |
| 268. |
A nuclear fission produces energy of following order in MeV |
| A. | 20 |
| B. | 200 |
| C. | 2000 |
| D. | 20,000 |
| Answer» C. 2000 | |
| 269. |
Gas cooled reactor uses following materials as moderator, and coolant |
| A. | graphite, C02 |
| B. | graphite, air |
| C. | heavy water, C02 |
| D. | ead, H2 |
| Answer» B. graphite, air | |
| 270. |
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. | |
| 271. |
Which of the following is the heaviest |
| A. | neutron |
| B. | proton |
| C. | atom |
| D. | electron |
| Answer» D. electron | |
| 272. |
Which of the following particles is the lightest |
| A. | nucleus |
| B. | electron |
| C. | proton |
| D. | neutron |
| Answer» C. proton | |
| 273. |
Which of the following are ferrite materials |
| A. | U233andPu239 |
| B. | U |
| C. | U238andPu239 |
| D. | U238andTh239 |
| Answer» C. U238andPu239 | |
| 274. |
The energy required to be applied to a radioactive nucleus for the emission of a neutron is |
| A. | 1 MeV |
| B. | 2.4 MeV |
| C. | 4.3 MeV |
| D. | 7.8 MeV |
| Answer» E. | |
| 275. |
Reflector in nuclear plants is used to |
| A. | return the neutrons back into the core |
| B. | shield the radioactivity completely |
| C. | check polllution |
| D. | conserve energy |
| Answer» B. shield the radioactivity completely | |
| 276. |
The number of isotopes of hydrogen are |
| A. | 1 |
| B. | 2 |
| C. | U |
| D. | 3 |
| Answer» D. 3 | |
| 277. |
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. | |
| 278. |
One gram of uranium will produce energy equivalent to approximately |
| A. | 1 tonne of high grade coal |
| B. | 4.5 tonnes of high grade coal |
| C. | 10 tonnes of high grade coal |
| D. | 100 tonnes of high grade coa |
| Answer» C. 10 tonnes of high grade coal | |
| 279. |
Breeder reactor has a conversion ratio of |
| A. | unity |
| B. | more than unity |
| C. | less than unity |
| D. | zero |
| Answer» C. less than unity | |
| 280. |
The total energy released in fission of U is |
| A. | 5 MeV |
| B. | 10 MeV |
| C. | 199 MeV |
| D. | 168 MeV |
| Answer» D. 168 MeV | |
| 281. |
The nuclear energy is measured as |
| A. | MeV |
| B. | curie |
| C. | farads |
| D. | MW |
| Answer» B. curie | |
| 282. |
The most commonly used moderator in nuclear plants is |
| A. | heavy water |
| B. | concrete and bricks |
| C. | graphite and concrete |
| D. | graphite |
| Answer» E. | |
| 283. |
Amongst the following, the fissionable materials are |
| A. | U233andPu239 |
| B. | U23iandPu233 |
| C. | U235andPu235 |
| D. | U238andPu239 |
| Answer» B. U23iandPu233 | |
| 284. |
Which is not identical for an atom and an isotope |
| A. | mass number |
| B. | atomic number |
| C. | chemical properties |
| D. | position in periodic table |
| Answer» B. atomic number | |
| 285. |
The mass number of a substance represents the sum of total number of |
| A. | protons and neutrons in an atom |
| B. | protons and electrons in an atom |
| C. | neutrons and electrons in an atom |
| D. | protons and neutrons in a nucleus |
| Answer» E. | |
| 286. |
The efficiency of a nuclear power plant in comparsion to a conventional thermal power plant is |
| A. | same |
| B. | more |
| C. | less |
| D. | unpredictable |
| Answer» D. unpredictable | |