Effective moderators are those materials which contain____________________?

A. Light weight atoms
B. Heavy weight atoms
C. Critical atoms
D. Zero weight atoms

A fast breeder reactor uses_______________?

A. 90% u-235
B. U-238
C. U-235
D. Pu-239

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

In boiling water reactor, moderator is__________________?

A. Coolant itself
B. Ferrite rod
C. Graphite rod
D. Liquid sodium metal

Half life of a radioactive isotope corresponds to the time required for half of the following to decay__________________?

A. electrons
B. protons
C. neutrons
D. nulceus

Artificial radioactive isotopes find application in________________?

A. power generation
B. nucleonic devices
C. nuclear fission
D. nuclear fusion

A fast breeder reactor uses following as fuel_________________?

A. Enriched uranium
B. Plutonium
C. Thorium
D. U235

A fast breeder reactor__________________?

A. Uses graphite rods as moderator
B. Has powerful moderator
C. Has no moderator
D. Uses ferrite material as moderator

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

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