351. Artificial radioactive isotopes find application in________________?
A. power generation
B. nucleonic devices
C. nuclear fission
D. nuclear fusion
E. medical field

352. A fast breeder reactor uses following as fuel_________________?
A. enriched uranium
B. plutonium
C. thorium
D. U235
E. natural uranium

353. A fast breeder reactor__________________?
A. uses graphite rods as moderator
B. has powerful moderator
C. has no moderator
D. uses ferrite material as moderator
E. uses pressurized water as moderator

354. Each fission of U235 produces following number of fast neutrons per fission________________?
A. 1 neutron
B. 1 — neutrons
C. 1 – 2 neutrons
D. 2 — neutrons
E. infinite

355. 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
E. reflector should be used

356. In nuclear fission___________________?
A. the original elements change into completely different elements
B. the electrons of the element change
C. the molecules rearrange themselves to form other molecules
D. none of the above

357. A boiling water reactor uses following as fuel________________?
A. enriched uranium
B. plutonium
C. thorium
D. U
E. natural uranium.

358. 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
E. diaphragm

359. Heat transfer takes place as per ________________?
A. zeroth law of thermodynamics
B. first law of thermodynamic
C. second law of the thermodynamics
D. Kirchhoff’s law E. Stefan’s law

360. When heat is transferred form hot body to cold body, in a straight line, without affecting the intervening medium, it is referred as heat transfer by __________________?
A. conduction
B. convection
C. radiation
D. conduction and convection
E. convection and radiation

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