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DRDO - Power Plant Engineering 1000+ MCQ [Solved] PDF Download

Thursday 9th of March 2023

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1. Uranium has isotopes
A. U???
B. U???
C. U???
D. All of these
Answer : D
2. The efficiency of a nuclear power plant in comparison to a conventional thermal power plant is
A. Same
B. More
C. Less
D. May be less or mote depending on size
Answer : C
3. 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 coal
Answer : B
4. The material most commonly used for shielding is
A. Carbon
B. Lead
C. Concrete
D. All of these
Answer : C
5. A fast breeder reactor
A. Uses graphite rods as moderator
B. Has powerful moderator
C. Has no moderator
D. Uses ferrite material as moderator
Answer : C
6. The energy produced by a thermal reactor of same size as a breeder reactor is
A. Almost same
B. Slightly more
C. Slightly less
D. Much less
Answer : D
7. The secondary fuel used in nuclear power plants is
A. U??? and Pu???
B. U??? and Th???
C. U??? and Pu???
D. U??? and Pu???
Answer : A
8. A moderator, apart from its high neutron slowing power, and low non-productive neutron, should be
A. Stable under nuclear radiation
B. Corrosion resistant
C. Good thermal conductor
D. All of these
Answer : D
9. Pressurised water reactor is designed
A. For boiling pi water in the core
B. To use liquid sodium metal as coolant
C. To use intermediate coolant
D. To prevent the water coolant from boiling in the core
Answer : D
10. In nuclear fission each neutron that causes fission releases
A. No new neutron
B. At least one new neutron
C. One new neutron
D. More than one new neutron
Answer : D
11. The main interest of shielding in nuclear reactor is protection against
A. X-rays
B. Infrared rays
C. Neutrons and gamma rays
D. Electrons
Answer : D
12. A boiling water reactor uses following as fuel
A. Enriched uranium
B. Plutonium
C. Thorium
D. U
Answer : A
13. Gas cooled reactor uses following materials as moderator, and coolant
A. Graphite, CO2
B. Graphite, air
C. Heavy water, CO2
D. Lead, H2
Answer : A
14. Atomic number of an element in the periodic table represents the numbers of
A. Protons in the nucleus
B. Electrons in the nucleus
C. Neutrons in the nucleus
D. Electrons in the atom
Answer : A
15. The unit of radioactivity is
A. Electron volt
B. Electron ampere
C. Curie
D. MV
Answer : C
16. A nuclear unit becoming critical means
A. It is generating power to rated capacity
B. It is capable of generating much more than rated capacity
C. There is danger of nuclear spread
D. Chain reaction that causes automatic splitting of the fuel nuclei has been established
Answer : D
17. 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 : A
18. Reflector in nuclear plants is used to
A. Return the neutrons back into the core
B. Shield the radioactivity completely
C. Check pollution
D. Conserve energy
Answer : A
19. A power plant giving least running cost of production of electrical power is
A. Steam power plant
B. Gas turbine power plant
C. Hydro electric power plant
D. Nuclear power plant
Answer : D
20. Plutonium is produced
A. As basic raw material
B. By neutron irradiation of Uz
C. By neutron irradiation of thorium
D. Artificially
Answer : B
21. 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 : A
22. The commonly used material for shielding is
A. Lead or concrete
B. Lead and tin
C. Graphite or cadmium
D. Thick galvanised sheets
Answer : A
23. 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 : A
24. The breeding gain in case of thermal breeder reactor as compared to fast breeder reactor is
A. Same
B. Lower
C. Higher
D. Unity
Answer : B
25. The primary fuel used in nuclear power plants is
A. U???
B. U???
C. Pu???
D. Pu???
Answer : A
26. Boiling water reactor employs
A. Boiler
B. Direct cycle of coolant system
C. Double circuit system of coolant cycle
D. Multi passes system
Answer : B
27. Electron volt is the unit of
A. Atomic power
B. Energy
C. Voltage
D. Radio activity
Answer : B
28. A fission chain reaction in uranium can be developed by
A. Slowing down fast neutrons so that Uz fission continues by slow motion neutrons
B. Accelerating fast neutrons
C. Absorbing all neutrons
D. Using moderator
Answer : A
29. Reactors for propulsion applications use
A. Natural uranium
B. Molten lead
C. Any form of uranium
D. Thorium
Answer : B
30. Plutonium (Pu???) is produced
A. Artificially
B. By fission of Th???
C. When U??? is irradiated by neutrons
D. As basic raw material
Answer : C
31. Isotopes of same elements have
A. Same atomic number and different masses
B. Same chemical properties but different atomic numbers
C. Different masses and different atomic numbers
D. Different chemical properties and same atomic numbers
Answer : B
32. 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 : D
33. Reflector in nuclear power plants _________ neutron leakage.
A. Increases
B. Decreases
C. Have no effect on
D. None of these
Answer : B
34. The fast breeder reactor uses the following moderator
A. Demineralised water
B. Carbon dioxide
C. Heavy water
D. No moderator is used
Answer : D
35. Enriched uranium is one in which
A. Percentage of U??? has been artificially increased
B. Percentage of U has been artificially increased
C. Percentage of U??? has been artificially increased
D. Extra energy is pumped from outside
Answer : A
36. Each fission of U??? produces following number of fast neutrons per fission
A. 1 neutron
B. 3 neutrons
C. 1, 2 neutrons
D. 2 neutrons
Answer : D
37. A fast breeder reactor uses following as fuel
A. Enriched uranium
B. Plutonium
C. Thorium
D. U???
Answer : D
38. Fast breeder reactor uses
A. Boiler
B. Direct cycle of coolant system
C. Double circuit system of coolant cycle
D. Multi passes system
Answer : C
39. Nuclear reactors are used
A. To produce heat for thermoelectric power
B. To produce fissionable material
C. To propel ships, submarines, aircrafts
D. All of these
Answer : D
40. In order to have constant chain reaction to produce a constant rate of heat output, the value of ratio of the number of neutrons in one generation to the number of neutrons in the immediately preceding generation must be
A. Greater than 1.0
B. Less than 1.0
C. Equal to zero
D. Equal to 1.0
Answer : D
41. Which of the following particles is the lightest?
A. Nucleus
B. Electron
C. Proton
D. Meson
Answer : B
42. Superheated steam is generated in following reactor
A. Boiling water
B. Gas cooled
C. Pressurised water
D. All of the above
Answer : B
43. U233 is produced
A. As basic raw material
B. By neutron irradiation of Uz
C. By neutron irradiation of thorium
D. Artificially
Answer : C
44. Ferrite material is
A. The most fissionable material
B. The basic fuel for nuclear paints
C. Basic raw material for nuclear plants
D. The material which absorbs neutrons and undergoes spontaneous changes leading to the formation of fissionable material
Answer : D
45. Artificial radioactive isotopes find application in
A. Power generation
B. Nucleonic devices
C. Nuclear fission
D. Medical field
Answer : D
46. The energy released during the fission of one atom of Uranium 235 in million electron volts is about
A. 100
B. 200
C. 300
D. 400
Answer : B
47. In a fission process, maximum percentage of energy is released as
A. Kinetic energy of neutrons
B. Kinetic energy of fission products
C. Instantaneous release of gamma rays
D. Gradual radioactive decay of fission products
Answer : B
48. Reactors for propulsion applications are designed for
A. Any form of uranium
B. Natural uranium
C. Enriched uranium
D. Plutonium
Answer : C
49. 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 : D
50. Pick up the wrong statement
A. In a heterogeneous or solid fuel reactor, the fuel is mixed in a regular pattern within moderator.
B. Slow or thermal neutrons have energy of the order or 0.025 eV
C. Fast neutrons have energies above 1000 eV
D. Fast reactor uses moderator
Answer : D

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