MCQOPTIONS
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MCQOPTIONS
This section includes 8247 Mcqs, each offering curated multiple-choice questions to sharpen your Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 1951. |
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 | |
| 1952. |
The number of neutrons in the nucleus of Uranium-233 (92U233) is |
| A. | 141 |
| B. | 92 |
| C. | 233 |
| D. | 325 |
| Answer» B. 92 | |
| 1953. |
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. | |
| 1954. |
The main purpose of control rod in a nuclear reactor is to control the |
| A. | chain reaction and hence the power output by regulating the number of secondary neutrons causing fission. |
| B. | emission of hazardous radiation. |
| C. | conversion of fissile material into fertile material. |
| D. | velocity of the secondary neutrons. |
| Answer» B. emission of hazardous radiation. | |
| 1955. |
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 | |
| 1956. |
Which of the following is not an ore of uranium ? |
| A. | Pitchblende |
| B. | Kyanite |
| C. | Carnotite |
| D. | Rescolite |
| Answer» C. Carnotite | |
| 1957. |
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 | |
| 1958. |
The main ore of uranium is |
| A. | pitchblende |
| B. | monazite sand |
| C. | cassiterite |
| D. | chalcopyrite |
| Answer» B. monazite sand | |
| 1959. |
Function of control rod in a nuclear reactor is to control |
| A. | temperature |
| B. | pressure |
| C. | fuel consumption |
| D. | absorption of neutrons |
| Answer» E. | |
| 1960. |
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 | |
| 1961. |
Extraction of uranium from its ore is done using __________ methods. |
| A. | electrometallurgical |
| B. | pyrometallurgical |
| C. | chemical |
| D. | physical beneficiation |
| Answer» D. physical beneficiation | |
| 1962. |
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. | |
| 1963. |
Nucleus of tritium has __________ neutrons. |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 5 |
| Answer» C. 3 | |
| 1964. |
Fast breeder reactors are most usable in India, because of our largest __________ deposits. |
| A. | thorium |
| B. | plutonium |
| C. | uranium |
| D. | none of these |
| Answer» B. plutonium | |
| 1965. |
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 | |
| 1966. |
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 | |
| 1967. |
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. | |
| 1968. |
In the nuclear reaction, 93N239 94Pu239 + ?; the missing particle is a/an |
| A. | electron |
| B. | proton |
| C. | neutron |
| D. | position |
| Answer» B. proton | |
| 1969. |
"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. | |
| 1970. |
Critical energy should be __________ the neutron binding energy of the atom in order to initiate a nuclear fission. |
| A. | equal to |
| B. | less than |
| C. | more than |
| D. | either more or less |
| Answer» D. either more or less | |
| 1971. |
The main ore of thorium is |
| A. | pitchblende |
| B. | monazite sand |
| C. | limonite |
| D. | galena |
| Answer» C. limonite | |
| 1972. |
Commercial power generation from fusion reactor is not yet possible, because |
| A. | it is difficult to control nuclear fusion reaction. |
| B. | the fuel required (i.e., deuterium & 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 (i.e., deuterium & tritium) is scarce. | |
| 1973. |
Which of the following is a non-fissile material ? |
| A. | Plutonium-239 |
| B. | Uranium-235 |
| C. | Uranium-233 |
| D. | Thorium-232 |
| Answer» E. | |
| 1974. |
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. | |
| 1975. |
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 | |
| 1976. |
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 | |
| 1977. |
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. | |
| 1978. |
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. | |
| 1979. |
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. | |
| 1980. |
Fuel for a fast breeder reactor is |
| A. | plutonium |
| B. | uranium |
| C. | radium |
| D. | neptunium |
| Answer» B. uranium | |
| 1981. |
Fast breeder test reactor at Kalpakkam is designed for using |
| A. | thorium as a fertile material. |
| B. | U-238 as a fertile material. |
| C. | helium as a coolant. |
| D. | uranium ore directly as a fuel. |
| Answer» B. U-238 as a fertile material. | |
| 1982. |
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 | |
| 1983. |
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. | |
| 1984. |
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 | |
| 1985. |
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. | |
| 1986. |
A fast breeder reactor |
| A. | uses natural uranium as fuel. |
| B. | does not require a moderator. |
| C. | both (a) and (b). |
| D. | neither (a) nor (b). |
| Answer» C. both (a) and (b). | |
| 1987. |
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. | |
| 1988. |
Uranium ore is mined & concentrated in India at |
| A. | Jadugoda(Jharkhand) |
| B. | Kota (Rajasthan) |
| C. | Tuticorin (Tamilnadu) |
| D. | Talchar (Orissa) |
| Answer» B. Kota (Rajasthan) | |
| 1989. |
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 | |
| 1990. |
Unit of radioactivity is |
| A. | barn |
| B. | Fermi |
| C. | Angstrom |
| D. | Curie |
| Answer» E. | |
| 1991. |
Net efficiency of ordinary light water cooled nuclear reactor is about __________ percent. |
| A. | 32 |
| B. | 52 |
| C. | 72 |
| D. | 88 |
| Answer» B. 52 | |
| 1992. |
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 | |
| 1993. |
One 'amu' is equivalent to |
| A. | 9.31 Mev |
| B. | 931 eV |
| C. | 931 MeV |
| D. | 931 J |
| Answer» D. 931 J | |
| 1994. |
A radioactive substance does not emit |
| A. | -ray |
| B. | proton |
| C. | position |
| D. | -ray |
| Answer» C. position | |
| 1995. |
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 | |
| 1996. |
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 | |
| 1997. |
__________ 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 | |
| 1998. |
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 | |
| 1999. |
Heavy water (D2O) in a nuclear reactor serves as a |
| A. | coolant |
| B. | moderator |
| C. | both (a) & (b) |
| D. | neutron absorber |
| Answer» D. neutron absorber | |
| 2000. |
Isotopes of an element have the same |
| A. | number of neutrons |
| B. | mass number |
| C. | electronic configuration |
| D. | atomic weight |
| Answer» D. atomic weight | |