Q.1
Enriched uranium is one in which
  • %age of U235 has been artificially in-creased
  • %age of U has been artificially increased
  • %age of U234 has been artificially increased
  • extra energy is pumped from outside
Q.2
The first nuclear power plant in India is located at
  • Baraeilly
  • Kalapakkam
  • Kota
  • Tarapur
Q.3
The risk of radioactive hazard is greatest in the turbine with following reactor
  • pressurized water
  • boiling water
  • gas cooled
  • liquid metal cooled
Q.4
Electron-volt is the unit of
  • atomic power
  • energy
  • voltage
  • radio activity
Q.5
The unit of radio-activity is
  • AMU
  • curie
  • MeV
  • electron-ampere
Q.6
Pick up the wrong statement Fast breeder reactors
  • operate at extremely high power densities.
  • produce more fuel than they consume
  • are liquid-metal cooled
  • use water as coolant
Q.7
Uranium-is produced
  • by neutron irradiation of thorium
  • by neutron irradiation of Uz
  • artificially
  • as basic raw material
Q.8
In triggering fission, the following types of neutrons are desirable
  • neutrons at rest
  • critical neutrons
  • slow moving
  • fast moving
Q.9
Superheated steam is generated in following reactor
  • gas cooled
  • pressurized water
  • boiling water
  • all of the above
Q.10
In a fission process, maximum %age of energy is released as
  • kinetic energy of fission products
  • instantaneous release of gamma rays
  • kinetic energy of neutrons
  • none of the above
Q.11
The following present serious difficulty in designing reactor shield
  • fast neutrons and gamma rays
  • alpha particles
  • beta particles
  • none of the above
Q.12
In nuclear fission
  • the original elements change into completely different elements
  • the electrons of the element change
  • the molecules rearrange themselves to form other molecules
  • none of the above
Q.13
Moderator in nuclear plants is used to
  • reduce temperature
  • extract heat from nuclear reaction
  • control the reaction
  • cause collision with the fast moving neutrons to reduce their speed
Q.14
Each fission of Uproduces following number of fast neutrons per fission
  • 1 2 neutrons
  • 1 neutron
  • 2 neutrons
  • infinite
Q.15
Radioactive isotopes find application in
  • power generation
  • nuclear fission
  • nuclear fusion
  • medical field
Q.16
A fast breeder reactor uses
  • U-239
  • U-238
  • 90% U-235
  • Pu-239
Q.17
In boiling water reactor, moderator is
  • ferrite rod
  • coolant itself
  • liquid sodium metal
  • blanket of thorium
Q.18
The most commonly used moderator in nuclear plants is
  • deuterium
  • graphite
  • heavy water
  • concrete and bricks
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