A nuclear fission is initiated when the critical energy as compared to neutron binding energy of the atoms is_________________?
(A) same
(B) more
(C) less
(D) there is no such criterion
(D) 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 atom
(D) protons and neutrons in a nucleus
(D) protons and electrons in a nucleus
The fast breeder reactor uses the following moderator__________________?
(A) demineralised water
(B) carbon dioxide
(C) heavy water
(D) graphite
(D) no moderator is used
The process by which a heavy nucleus is splitted into two light nuclei is known as_________________?
(A) splitting
(B) fission
(C) fusion
(D) disintegration
(D) chain reaction
Hydrogen is preferred as better coolant in comparison to C02 because former_____________________?
(A) is lighter
(B) is inert
(C) has high specific heat
(D) is a good conductor
(D) all of the above
U235 will undergo fission by__________________?
(A) high energy (fast) neutrons alone
(B) low energy (slow) neutrons alone
(C) either fast or slow neutrons
(D) medium energy neutrons
(D) none of the above
The first unclear power plant in India is located at____________________?
(A) Kota
(B) Kalapakkam
(C) Tarapur
(D) Baraeilly
(D) Kerala
Boiling water reactor uses the following as moderator, coolant and working fluid________________?
(A) ordinary fluid
(B) heavy water
(C) molten lead
(D) hydrogen gas
(D) none of the above
U238 will undergo fission by_________________?
(A) high energy (fast) neutrons alone
(B) low energy (slow) neutrons alone
(C) either fast or slow neutrons
(D) medium energy neutrons
(D) none of the above
Ideally the neutron flux in reactor should be__________________ ?
(A) maximum in center and zero at side
(B) maximum at side and zero in center
(C) uniform throughout
(D) zero throughout
(D) none of the above