In fast breeder reactors___________________? A. any type of moderator can be used B. graphite is used as the moderator C. heavy water is used as the moderator D. moderator may or may not be usedE. moderator is dispensed with
Which of the following particles is the lightest__________________? A. nucleusB. electron C. proton D. meson E. neutron
In nuclear fission each neutron that causes fission releases_______________? A. no new neutron B. at least one new neutron C. one new neutronD. more than one new neutrons E. many-fold neutrons
Gas cooled reactor uses following materials as moderator, and coolant____________________? A. graphite, C02 B. graphite, air C. heavy water, C02 D. lead, H2 E. concrete, N2
A nuclear fission is initiated when the critical energy as compared to neutron binding energy of the atoms is_________________? A. sameB. more C. less D. there is no such criterion E. none of the above
The mass number of a substance represents the sum of total number of___________________? A. protons and neutrons in an atom B. protons and electrons in an atom C. neutrons and electrons in an atomD. protons and neutrons in a nucleus…
The fast breeder reactor uses the following moderator__________________? A. demineralised water B. carbon dioxide C. heavy water D. graphiteE. no moderator is used
The process by which a heavy nucleus is splitted into two light nuclei is known as_________________? A. splittingB. fission C. fusion D. disintegration E. chain reaction
A nuclear fission produces energy of following order in MeV___________________? A. 20B. 200 C. 2000 D. 20,000 E. 2 x 105
The breeding gain in case of thermal breeder reactor as compared to fast breeder reactor is________________? A. sameB. lower C. higher D. unity E. higher/lower depending on the size of reactor