chemical engineering nuclear power engineering Mcqs
3. A heterogeneous reactor is the one, in which the moderator and the________________?
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A. Coolant are present in different phases (e.g., heavy water and graphite)

B. None of these

C. Coolant are different materials

D. Fuel are present in different phases (e.g. uranium and heavy water)
4. Which of the following factors is the most important in the site selection for a nuclear power plant ?
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A. Abundant availability of water

B. Proximity to fuel source

C. Remotely located from residential areas

D. Absence of earthquake prone zone in nearby areas
5. Which of the following may not need a moderator ?
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A. Fast breeder reactor

B. Candu reactor

C. Pressurised water reactor

D. Homogeneous reactor

7. Liquid metal (e.g., molten sodium) is preferred as a coolant in case of a/an ______________ reactor?
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A. Fast breeder

B. Enriched uranium (3% U-235) fuelled

C. Graphite moderated

D. Homogeneous

8. The main purpose of control rod in a nuclear reactor is to control the___________________?
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A. Chain reaction and hence the power output by regulating the number of secondary neutrons

B. Emission of hazardous radiation

C. Conversion of fissile material into fertile material

D. Velocity of the secondary neutrons

E. sing fission</strong>

9. Heavy water is preferred over ordinary water as a coolant, because it?
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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.
10. Tarapur (INDIA) atomic power station____________________?
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A. Has an installed capacity of 400 MW

B. Is the first power reactor in India, which became critical in 1969

C. All A., B. and C.

D. Has two boiling water reactors of American design

13. Final product of uranium extraction plant at Jadugoda (Bihar) is________________?
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A. Magnesium diuranate

B. Uranium oxide

C. Uranium

D. Uranium carbide

16. In nuclear reactions, ______________ number is conserved?
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A. Mass

B. Atomic

C. Both A. & B.

D. Neither A. nor B.

18. Isotopes of an element have the same__________________?
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A. Electronic configuration

B. Mass number

C. Number of neutrons

D. Atomic weight

19. Unit of radioactivity is_________________?
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A. Curie

B. Fermi

C. Angstrom

D. Barn

20. Water is a better coolant than a gas (like CO2, He, N2 etc.), because it_________________?
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A. Require comparatively smaller pumps and heat exchanger for a given heat transfer rate

B. Is a better neutron moderator as well

C. All A., B. and C.

D. Has a better heat transfer characteristics, and it can be pressurised to attain a high temperature

21. An ideal coolant for a nuclear reactor should ________________?
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A. Have high density, but low heat transfer co-efficient

B. Be capable of attaining high temperature, only when it is pressurised

C. Be a good absorber of neutrons

D. Be free from radiation damage and non-corrosive
22. The decrease in the atomic number is not observed in case of________________?
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A. ?-emission

B. Positron emission

C. Electron capture

D. ?-emission
23. The electric power generation cost in nuclear power plant is less than that in a coal based thermal power plant, mainly because the________________?
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A. Thermal efficiency of the former is higher

B. Fuel cost per unit power generated is less

C. Maintenance cost of the former is less

D. None of these

24. Out of the following places, a nuclear power plant is not located at______________?
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A. Talcher (Orissa)

B. Kalpakkam (Tamilnadu)

C. Kaiga (Karnataka)

D. Rawatbhata (Rajasthan)

26. Thorium can be converted into U-233 in a _____________ reactor?
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A. Liquid metal cooled

B. Swimming pool

C. Thermal

D. Fast breeder
27. Fuel for a nuclear reactor (thermal) is___________________?
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A. None of these

B. Radium

C. Uranium

D. Plutonium

29. A nuclear reactor cant be used for_________________?
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A. Marine ship propulsion

B. None of these

C. Supplying intense fields or beams of neutron for scientific experiments

D. The production of radioisotopes

30. Use of molten metal as a coolant in fast breeder reactor helps in_________________?
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A. Rapid heat transfer from the core

B. Breeding neutrons

C. Accelerating the neutrons

D. Accelerating the reaction rate in the core

31. Plutonium________________?
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A. Is recovered from spent fuel from thermal nuclear reactor

B. Has much lower melting point (640C ) compared to thorium (1690C)

C. Both A. and B.

D. Neither A. nor B.

33. Graphite is used in nuclear reactor as_____________________?
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A. Insulation lining of the reactor

B. Retarder of neutron velocity

C. Lubricant

D. Fuel

34. The half life period of a radioactive substance is best determined by counting the number of alpha particles emitted per second in a Geiger Muller counter from its known quantity. If the half life period of a radioactive substance is one month, then____________?
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A. 1/8th of it will remain intact at the end of four months

B. It will completely disintegrate in two months

C. It will completely disintegrate in four months

D. 3/4th of it will disintegrate in two months

38. Spent fuel from the nuclear thermal reactor contains__________________?
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A. All A., B. & C.

B. Fission products

C. Plutonium

D. Unused fuel

39. Candu reactor is a ______________ nuclear reactor?
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A. Fast breeder

B. Homogeneous

C. Natural uranium fuelled heavy water cooled & moderated

D. Highly enriched uranium (85% U-235) fuelled

41. Which of the following is a non-fissile material ?
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A. Plutonium-239

B. Uranium-233

C. Uranium-235

D. Thorium-232
42. Which of the following is the most harmful for the human being ?
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A. Ultra violet rays

B. ?-rays

C. X-rays

D. ?-rays

45. Which is not a fissile nuclear material ?
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A. U-233

B. U-235

C. Pu-239

D. U-238
47. A boiling water reactor is the one, in which the_______________________?
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A. Coolant water, after being heated in the reactor core, generates steam in a boiler

B. Fuel and the coolant are thoroughly mixed to form a homogeneous solution

C. Coolant water is allowed to boil in the core of the reactor

D. Pressurised water is pumped into the core

49. Nuclear fuel usually used in a Boiling Water Reactor (BWR) is__________________?
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A. Enriched uranium

B. Plutonium

C. Natural uranium

D. Thorium

50. Molten sodium (as a coolant in fast breeder reactor) ?
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A. tact with air or water</strong>

B. Cant attain high temperature at normal pressure

C. None of these

D. Is highly radioactive at elevated temperatures and can cause explosion, when it comes in

E. Is not at all corrosive, even at a higher temperature