Artificial radioactive isotopes find application in________________?

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

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

In boiling water reactor, moderator is__________________?

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

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

A fast breeder reactor uses_______________?

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

Effective moderators are those materials which contain____________________?

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

The coolant used in boiling water reactor is________________?

A. Co2
B. Pressurised water
C. Mixture of water and steam
D. Liquid metal

The most practical fuel for a thermo-nuclear reactor, both from econocical and nuclear consideration is____________________?

A. Plutonium
B. Uranium
C. Deuterium
D. Thorium

The presence of reflector in nuclear power plants results in___________________?

A. Increased production of neutrons
B. Complete absorption of neutrons
C. Controlled production of neutrons
D. Decreased leakage of neutrons

The efficiency of a nuclear power plant in comparison to conventional and nuclear consideration is__________________?

A. Higher cost of nuclear fuel
B. High initial cost
C. High heat rejection in condenser
D. Lower temperature and pressure condi-tions